Java Programming Lab Manual
Content
PROGRAMMING WITH J AVA
LAB
Under the Guidance of
Sri S.V.G.REDDY,
ASSOCIATE PROFESSOR,
DEPT. OF CSE,
GIT , GITAM UNIVERSITY.
2/4 B.Tech (B4), CSE DEPARTMENT
GIT, GITAM UNIVERSITY
INDEX
Name: Regd no:
Section: Branch:
S. No Name of the program Page No Signature
*1
Temparature Conversion 1 - 2
*2
Bank Account Class 3 - 6
*3
String Palindrome 7 - 8
4
2D String Array 9 -11
5
Commandline & Static 12 - 13
6
Abstract classes & methods 14 - 16
7
Access Controls 17 - 18
8
Method Overloading 19 - 21
9
Constructor Overloading 22 - 23
10
Multilevel Inheritance 24 - 25
11
Hierarchial Inheritance 26 - 27
*12
Multiple
Inheritance(Interface)
28 - 30
13
Method Over-riding 31 - 34
14
Prevention using "Final" 35 - 36
15
System defined exceptions 37 - 38
16
User defined exceptions 39 - 40
*17
Threads with "Runnable" 41 - 42
18
Threads with priority 43 - 44
19
Flow Layout 45 - 47
20
Border Layout 48 - 49
21
Grid Layout 50 - 51
22
Label 52 - 53
23
Button 54 - 56
24
Checkbox 57 -59
25
Checkbox Group 60 - 62
26
Choice 63 - 65
INDEX
Name: Regd no:
Section: Branch:
S. No Name of the program Page No Signature
27
List 66 - 68
28
Text Field 69 - 71
29
Text Area 72 - 73
*30
User inputs in applet 74 - 76
*31
Future Investment 77 - 79
*32
Frames and Panels 80 - 81
*33
Mouse pressed location 82 - 83
*34
Mouse events 84 - 86
*35
Drawing Shapes 87 - 88
*36
Barcharts with passing
parameters
89 - 90
*37
Barcharts with different
inputs
91 - 93
38
39
40
* : Lab cycle programs
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 1
PROGRAM – 1
AIM:
To develop a program to convert the given temparature in
Fahrenheit to Celcius.
SOURCE CODE:
import java.io.*;
public class TempConvert
{
public static void main( String ar[] )throws IOException
{
DataInputStream d =new DataInputStream( System.in );
String s1[] =new String[10];
String s2;
float a[] =new float[10];
float b[] =new float[10];
System.out.println("Enter the no.of temparature
readings:");
s2 =d.readLine();
int n =Integer.parseInt( s2 );
System.out.println("Enter the " +n +" readings in
Fahrenheit scale:");
for( int i =0 ; i <n ; i++)
{
s1[i] =d.readLine();
a[i] =Float.parseFloat( s1[i] );
b[i] =( ( a[i] - 32 ) / (float)1.8 );
}
System.out.println("The converted data is:");
System.out.println("FAHRENHEIT\t\tCELCIUS");
System.out.println("--------------------------------");
JAVA RECORD - 2/ 4 B4
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for( int i =0 ; i <n ; i++)
{
System.out.println( " " +a[i] +"\t\t" +b[i] );
}
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 3
PROGRAM – 2
AIM:
Develop a program to design a class that represents a bank
account,including the following members:
DATA MEMBERS:
1.Name of the depositor
2.Account number
3.Type of account
4.Balance
METHODS:
1.To assign initial values
2.To deposit an amount
3.To withdraw an amount after checking balance
4.To display the name,account number and
balance
SOURCE CODE:
import java.io.*;
class BankRep
{
double bal , wthd , dep;
int ty;
DataInputStream d =new DataInputStream( System.in );
String name , s3 , s4 , s5 , s6 , acc;
public void init()throws IOException
{
System.out.println("Enter the name of account-holder:");
name =d.readLine();
System.out.println("Enter the account number:");
acc =d.readLine();
System.out.println("Types of account:\n1.CURRENT\n2.SAVINGS\n3.FIXED
DEPOSIT\nEnter choice:");
s3 =d.readLine();
ty =Integer.parseInt( s3 );
switch( ty )
{
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 4
case 1: s3 ="CURRENT";
break;
case 2: s3 ="SAVINGS";
break;
case 3: s3 ="FIXED DEPOSIT";
break;
default:System.out.println("Illegal entry!!");
}
System.out.println("Type of account entered:" +s3);
System.out.println("Enter the amount present in account:");
s4 =d.readLine();
bal =Double.parseDouble( s4 );
}
public void deposit()throws IOException
{
System.out.println("Enter the amount to deposit:");
s5 =d.readLine();
dep =Double.parseDouble( s5 );
bal =bal +dep;
}
public void withd()throws IOException
{
System.out.println("Enter the amount to withdraw:");
s6 =d.readLine();
wthd =Double.parseDouble( s6 );
bal =bal - wthd;
}
public void enq()
{
System.out.println("Balance is:" +bal);
}
public void display()
{
System.out.println("The updated details of account are:\nNAME:" +name +
"\nAccount Number:" +acc +"\nBalance in account after last transaction:" +bal);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 5
}
}
public class Class
{
public static void main( String ar[] )throws IOException
{
BankRep b =new BankRep();
b.init();
int ch;
String s;
DataInputStream k =new DataInputStream( System.in );
do
{
System.out.println("Type of
Transaction:\n1.DEPOSIT\n2.WITHDRAWL\n3.BALANCE ENQUIRY\n4.EXIT\nEnter choice:");
s =k.readLine();
ch =Integer.parseInt( s );
switch( ch )
{
case 1: b.deposit();
break;
case 2: b.withd();
break;
case 3: b.enq();
break;
case 4: b.display();
System.exit(0);
default:System.out.println("Illegal choice!!");
}
}while( ch !=5 );
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 6
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 7
PROGRAM – 3
AIM:
Develop a program that takes a string from the commandline
arguments and checks whether it is a palindrome or not.
SOURCE CODE:
public class StrPalind
{
public static void main( String ar[] )
{
String s=ar[0];
System.out.println("The given string is:" +ar[0] );
int l=s.length();
int count=0;
for(int i=0;i<l;i++)
{
if(s.charAt(i)!=s.charAt(l-i-1))
{
count=1;
}
}
if(count==1)
{
System.out.println("The given string '" +ar[0] +"' is not a palindrome!");
}
else
{
System.out.println("The given string '" +ar[0] +"' is a palindrome!");
}
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 8
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 9
PROGRAM – 4
AIM:
Develop a program that appends two 2D string arrays using string
handling functions.
SOURCE CODE:
import java.io.*;
class string2D
{
public static void main( String ar[] )throws IOException
{
DataInputStream d =new DataInputStream( System.in );
String a[][] =new String[20][20];
String b[][] =new String[20][20];
String c[][] =new String[20][20];
String s1 , s2 , s3 , s4;
System.out.println("Enter the values of rows and columns of first matrix:");
s1 =d.readLine();
s2 =d.readLine();
System.out.println("Enter the values of rows and columns of second matrix:");
s3 =d.readLine();
s4 =d.readLine();
int m , n , p , q , i , j;
m =Integer.parseInt( s1 );
n =Integer.parseInt( s2 );
p =Integer.parseInt( s3 );
q =Integer.parseInt( s4 );
System.out.println("Enter the elements of first matrix:");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 10
for( i =0 ; i <m ; i++)
for( j =0 ; j <n ; j++)
{
a[i][j] =d.readLine();
}
System.out.println("Enter the elements of second matrix:");
for( i =0 ; i <p ; i++)
for( j =0 ; j <q ; j++)
{
b[i][j] =d.readLine();
}
System.out.println("The entered first matrix:");
for( i =0 ; i <m ; i++)
{
for( j =0 ; j <n ; j++)
{
System.out.print( a[i][j] +"\t" );
}
System.out.println("\n");
}
System.out.println("The entered second matrix:");
for( i =0 ; i <p ; i++)
{
for( j =0 ; j <q ; j++)
{
System.out.print( b[i][j] +"\t" );
}
System.out.println("\n");
}
if( ( m ==p ) && ( n ==q ) )
{
for( i =0 ; i <p ; i++)
for( j =0 ; j <q ; j++)
{
c[i][j] =a[i][j].concat( b[i][j] );
}
}
else
System.out.println("Addition is not possible as the matrices orders are
unequal");
System.out.println("The result matrix:");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 11
for( i =0 ; i <p ; i++)
{
for( j =0 ; j <q ; j++)
{
System.out.print( c[i][j] +"\t" );
}
System.out.println("\n");
}
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 12
PROGRAM – 5
AIM:
Develop a program to demonstrate both commandline arguments
and static members.
SOURCE CODE:
class CommandLine
{
public static void main(String args[])
{
for(int i=0; i<args.length; i++)
System.out.println("args[" +i +"]: " +
args[i]);
UseStatic ob =new UseStatic();
ob.meth(42);
}
}
class UseStatic
{
static int a =3;
static int b;
static void meth(int x)
{
System.out.println("x =" +x);
System.out.println("a =" +a);
System.out.println("b =" +b);
}
static
{
System.out.println("Static block initialized.");
b =a * 4;
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 13
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 14
PROGRAM – 6
AIM:
Develop a program to demonstrate abstract classes and methods .
SOURCE CODE:
import java.io.*;
abstract class Figure
{
double dim1;
double dim2;
Figure( ) throws IOException
{
String s;
DataInputStream g =new DataInputStream( System.in );
System.out.println("Enter the dimensions:");
s =g.readLine();
dim1 =Float.parseFloat( s );
s =g.readLine();
dim2 =Float.parseFloat( s );
}
abstract double area( );
}
class Rectangle extends Figure
{
Rectangle( ) throws IOException
{
super();
}
// override area for rectangle
double area( )
{
System.out.println("Inside Area for Rectangle:");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 15
return dim1 * dim2;
}
}
class Triangle extends Figure
{
Triangle()throws IOException
{
super();
}
// override area for right triangle
double area()
{
System.out.println("Inside Area for Triangle:");
return dim1 * dim2 / 2;
}
}
class AbstractAreas
{
public static void main( String ar[] )throws IOException
{
int ch;
String s;
Figure figref;
DataInputStream d =new DataInputStream( System.in );
OverloadDemo ob =new OverloadDemo();
do
{
System.out.println("\nMENU\n1.Find area of rectangle\n2.Find area of
triangle");
System.out.println("3.Exit\nEnter youir choice:");
s =d.readLine();
ch =Integer.parseInt( s );
switch( ch )
{
case 1: Rectangle r =new Rectangle();
figref =r;
System.out.println( "Area is " +figref.area() );
break;
JAVA RECORD - 2/ 4 B4
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case 2: Triangle t =new Triangle();
figref =t;
System.out.println( "Area is " +figref.area() );
break;
case 3: System.exit( 0 );
break;
default:System.out.println("Invalid choice!!!");
}
}while( ch !=3 );
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 17
PROGRAM – 7
AIM:
Develop a program to demonstrate the access specifiers .
SOURCE CODE:
class Test
{
int a;
public int b;
private int c;
void setc(int i)
{
c =i;
}
int getc()
{
return c;
}
}
class AccessTest
{
public static void main(String args[])
{
Test ob =new Test();
ob.a =10;
ob.b =20;
ob.setc(100);
System.out.println("a, b, and c: " +ob.a +" " +ob.b +" " +ob.getc());
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 18
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 19
PROGRAM – 8
AIM:
Develop a program to demonstrate the method overloading .
SOURCE CODE:
import java.io.*;
class OverloadDemo
{
void test()
{
System.out.println("No parameters");
}
void test(int a)
{
System.out.println("a: " +a);
}
void test(int a, int b)
{
System.out.println("a and b: " +a +" " +b);
}
double test(double a)
{
System.out.println("double a: " +a);
return a*a;
}
}
class Test
{
public static void main( String ar[] )throws IOException
{
int ch ;
String s;
double result;
DataInputStream d =new DataInputStream( System.in );
OverloadDemo ob =new OverloadDemo();
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 20
do
{
System.out.println("MENU\n1.Call method with no parameters\n2.Call
method with one integer parameters");
System.out.println("3.Call method with two integer parameters\n4.Call
method with a double parameter");
System.out.println("5.Exit\nEnter youir choice:");
s =d.readLine();
ch =Integer.parseInt( s );
switch( ch )
{
case 1: ob.test();
break;
case 2: ob.test( 10 );
break;
case 3: ob.test( 10 , 20 );
break;
case 4: result =ob.test( 11.3654 );
System.out.println("Result =" +result );
break;
case 5: System.exit( 0 );
break;
default:System.out.println("Invalid choice!!!");
}
}while( ch !=5 );
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 21
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 22
PROGRAM – 9
AIM:
Develop a program to demonstrate the constructor overloading .
SOURCE CODE:
import java.io.*;
class Box
{
double width;
double height;
double depth;
Box(double w, double h, double d)
{
width =w;
height =h;
depth =d;
}
Box()
{
width =5; // use -1 to indicate
height =5; // an uninitialized
depth =5; // box
}
Box(double len)
{
width =height =depth =len;
}
double volume()
{
return width * height * depth;
}
}
class OverloadCons
{
public static void main( String ar[] )
JAVA RECORD - 2/ 4 B4
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{
Box mybox1 =new Box( 100 , 200 , 150 );
Box mybox2 =new Box();
Box mycube =new Box( 70 );
double vol;
vol =mybox1.volume();
System.out.println("Volume of mybox1 is " +vol);
vol =mybox2.volume();
System.out.println("Volume of mybox2 is " +vol);
vol =mycube.volume();
System.out.println("Volume of mycube is " +vol);
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 24
PROGRAM – 10
AIM:
Develop a program to demonstrate multilevel inheritance.
SOURCE CODE:
import java.io.*;
class student
{
int roll_no;
public void getnumber(int m)
{
roll_no =m;
}
}
class marks extends student
{
int marks1,marks2;
public void getmarks(int m,int n)
{
marks1 =m;
marks2 =n;
}
}
class results extends marks
{
void putdetails()
{
int total=marks1+marks2;
System.out.println("\nStudent roll number : "+roll_no);
System.out.println("\nMarks Obtained:");
System.out.println("Marks1 ="+marks1);
System.out.println("Marks2 ="+marks2);
System.out.println("\nTotal ="+total);
}
}
class exam
{
public static void main(String args[])throws IOException
{
DataInputStream d =new DataInputStream(System.in);
String s1,s2,s3;
int a,b,c;
System.out.println("Enter roll-number : ");
s1=d.readLine();
System.out.println("Enter Marks : ");
s2=d.readLine();
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s3=d.readLine();
a=Integer.parseInt(s1);
b=Integer.parseInt(s2);
c=Integer.parseInt(s3);
results ob =new results();
ob.getnumber(a);
ob.getmarks(b,c);
ob.putdetails();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 26
PROGRAM – 11
AIM:
Develop a program to demonstrate hierarchial inheritance.
SOURCE CODE:
import java.io.*;
class numbers
{
int num1,num2;
public void getnumbers(int m,int n)
{
num1 =m;
num2 =n;
}
}
class addition extends numbers
{
int sum;
void add()
{
sum =num1+num2;
}
void putdata()
{
System.out.println("\nSum of "+num1+" and "+num2+" ="+sum);
}
}
class subtraction extends numbers
{
int diff;
void sub()
{
diff =num1-num2;
}
void putdata()
{
System.out.println("\nDifference between "+num1+" and "+num2+" ="+diff);
}
}
class operation
{
public static void main(String args[])throws IOException
{
DataInputStream d =new DataInputStream( System.in );
String s1,s2;
int a,b;
JAVA RECORD - 2/ 4 B4
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System.out.println("Enter the numbers:" );
s1 =d.readLine();
s2 =d.readLine();
a =Integer.parseInt(s1);
b =Integer.parseInt(s2);
addition ob1 =new addition();
ob1.getnumbers(a,b);
ob1.add();
ob1.putdata();
subtraction ob2 =new subtraction();
ob2.getnumbers(a,b);
ob2.sub();
ob2.putdata();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 28
PROGRAM – 12
AIM:
Develop a program to demonstrate multiple inheritance using
interfaces.
SOURCE CODE:
import java.io.*;
class Student
{
int roll;
String name;
void getData()throws IOException
{
String s;
DataInputStream d =new DataInputStream( System.in );
System.out.println("Enter the name of the student:");
name =d.readLine();
System.out.println("Enter the roll number of the student:");
s =d.readLine();
roll =Integer.parseInt( s );
}
void putData()
{
System.out.println("Name:" +name +"\nRoll no:" +roll );
}
}
class Test extends Student
{
float m1 , m2;
void getMarks()throws IOException
{
String s;
DataInputStream d =new DataInputStream( System.in );
JAVA RECORD - 2/ 4 B4
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System.out.println("Enter the inernal marks of the student:");
s =d.readLine();
m1 =Float.parseFloat( s );
System.out.println("Enter the external marks of the student:");
s =d.readLine();
m2 =Float.parseFloat( s );
}
void putMarks()
{
System.out.println("Marks obtained:\nInternal:" +m1 +"\nExternal:" +m2 );
}
}
interface Sports
{
float sprt =6.5F;
void putWt();
}
class Results extends Test implements Sports
{
float tot;
public void putWt()
{
System.out.println("Sport Weight:" +sprt );
}
void display()
{
tot =m1 +m2 +sprt;
putData();
putMarks();
putWt();
System.out.println("Total Score:" +tot );
}
}
class Multiple
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{
public static void main( String ar[] )throws IOException
{
Results r =new Results();
r.getData();
r.getMarks();
r.display();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 31
PROGRAM – 13
AIM:
Develop a program to demonstrate method over-riding.
SOURCE CODE:
import java.io.*;
class Figure
{
double dim1;
double dim2;
Figure()throws IOException
{
String s;
DataInputStream g =new DataInputStream( System.in );
System.out.println("Enter the dimensions:");
s =g.readLine();
dim1 =Float.parseFloat( s );
s =g.readLine();
dim2 =Float.parseFloat( s );
}
double area()
{
System.out.println("Area for Figure is undefined,as we don't know the shape!");
return 0;
}
}
class Rectangle extends Figure
{
Rectangle()throws IOException
{
super();
}
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// override area for rectangle
double area()
{
System.out.println("Inside Area for Rectangle.");
return dim1 * dim2;
}
}
class Triangle extends Figure
{
Triangle()throws IOException
{
super();
}
// override area for right triangle
double area()
{
System.out.println("Inside Area for Triangle.");
return dim1 * dim2 / 2;
}
}
class FindAreas
{
public static void main( String ar[] )throws IOException
{
int ch;
String s;
Figure figref;
DataInputStream d =new DataInputStream( System.in );
OverloadDemo ob =new OverloadDemo();
do
{
System.out.println("\nMENU\n1.Find area of rectangle\n2.Find area of
triangle");
System.out.println("3.Find area of figure by super class method");
System.out.println("4.Exit\nEnter youir choice:");
s =d.readLine();
ch =Integer.parseInt( s );
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switch( ch )
{
case 1: Rectangle r =new Rectangle();
figref =r;
System.out.println( "Area is " +figref.area() );
break;
case 2: Triangle t =new Triangle();
figref =t;
System.out.println( "Area is " +figref.area() );
break;
case 3: Figure f =new Figure();
figref =f;
System.out.println("Area is " +figref.area());
break;
case 4: System.exit( 0 );
break;
default:System.out.println("Invalid choice!!!");
}
}while( ch !=4 );
}
}
JAVA RECORD - 2/ 4 B4
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OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 35
PROGRAM – 14
AIM:
Develop a program to demonstrate how to prevent method over-
riding using "final" keyword.
SOURCE CODE:
//Program to prevent method overloading using final keyword:#1
class A
{
final void meth()
{
System.out.println("This is a final method.");
}
}
class B extends A
{
void meth()
{
// ERROR! Can't override.
System.out.println("Illegal!");
}
}
class TestFinal
{
public static void main( String ar[] )
{
B b =new B();
b.meth();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 36
//Program to prevent method overloading using final keyword:#2
class A
{
final void meth()
{
System.out.println("This is a final method.");
}
}
class B extends A {}
class TestFinal
{
public static void main( String ar[] )
{
B b =new B();
b.meth();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 37
PROGRAM – 15
AIM:
Develop a program to demonstrate how to handle system defined
exceptions.
SOURCE CODE:
class Multicatch
{
public static void main(String args[])
{
int a[]={5 , 10 };
int b =5;
try
{
int z =a[2] / b - a[1];
}
catch( ArithmeticException e )
{
System.out.println("Division by zero");
}
catch( ArrayIndexOutOfBoundsException e )
{
System.out.println("Array out of bounds");
}
catch( NullPointerException e )
{
System.out.println("Null exception");
}
finally
{
System.out.println("System defined exception is caught!");
int y =a[1] / a[0];
System.out.println( "Value =" +y );
}
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 38
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 39
PROGRAM – 16
AIM:
Develop a program to demonstrate how to handle user defined
exceptions.
SOURCE CODE:
import java.io.*;
class MyException extends Exception
{
private float detail;
MyException(float a)
{
detail =a;
}
public String toString()
{
return "MyException[" +detail +"]";
}
}
class ExceptionDemo
{
static void compute(float a) throws MyException
{
System.out.println("Called compute(" +a +")");
if(a <1)
throw new MyException(a);
System.out.println("Normal exit");
}
public static void main( String ar[] )throws IOException
{
int a , b;
float r;
DataInputStream d =new DataInputStream( System.in );
System.out.println("Enter the values of a and b:");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 40
String s =d.readLine();
a =Integer.parseInt( s );
s =d.readLine();
b =Integer.parseInt( s );
try
{
r =( float ) a / ( float ) b ;
compute(r);
}
catch ( MyException e )
{
System.out.println("Caught " +e);
}
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 41
PROGRAM – 17
AIM:
Develop a program to demonstrate multithreading concept using
"Runnable " interface.
SOURCE CODE:
class Runnabletest implements Runnable
{
int i;
String str;
Runnabletest( String s )
{
str=s;
}
public void run()
{
for(int i=0;i<8;i++)
{
System.out.println(str);
}
}
}
class Runnabledemo
{
public static void main(String args[])
{
Runnabletest x=new Runnabletest("First thread");
Runnabletest y=new Runnabletest("second thread");
Thread t1=new Thread(x);
Thread t2=new Thread(y);
t1.start();
t2.start();
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 42
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 43
PROGRAM – 18
AIM:
Develop a program to demonstrate multithreading concept
implementing priorities.
SOURCE CODE:
import java.io.*;
class A extends Thread
{
publc void run( ) throws IOException
{
DataInputStream d =new DataInputStream( System.in );
for(int j=1;j<=5;j++)
{
System.out.println("\nEnter the value for thread A:");
String s =d.readLine( );
}
System.out.println("\t Exit from A");
}
}
class B extends Thread
{
public void run( )throws IOException
{
for(int j=1;j<=5;j++)
{
System.out.println("\nEnter the value for thread B:");
String s =d.readLine( );
}
System.out.println("\t Exit from B");
}
}
class C extends Thread
{
public void run( )throws IOException
{
for(int k=1;k<=5;k++)
{
System.out.println("\nEnter the value for thread C:");
String s =d.readLine( );
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 44
}
System.out.println("\t Exit from C");
}
}
class Test
{
public static void main(String args[])
{
A ob1 =new A( );
B ob2 =new B( );
C ob3 =new C( );
ob3.setPriority( Thread.MAX_PRIORITY );
ob2.setPriority( ob1.getPriority( ) +1 );
ob3.setPriority( Thread.MIN_PRIORITY );
System.out.println( "Start Thread A" );
ob1.start( );
System.out.println( "Start Thread B" );
ob2.start( );
System.out.println( "Start Thread C" );
ob3.start( );
System.out.println( "End of Main Thread" );
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 45
PROGRAM – 19
AIM:
Develop a program to demonstrate flow layout.
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code ="FlowLayoutDemo"
width =400
height =200>
</applet>
*/
public class FlowLayoutDemo extends Applet implements ItemListener
{
String msg =" ";
Checkbox win98 , winNT , solaris , mac;
public void init()
{
setLayout( new FlowLayout( FlowLayout.LEFT ) );
win98 =new Checkbox("Windows 98/XP",null,true);
winNT =new Checkbox("Windows NT");
solaris =new Checkbox("Solaris");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 46
mac =new Checkbox("Apple's Mac");
add( win98 );
add( winNT );
add( solaris );
add( mac );
win98.addItemListener( this );
winNT.addItemListener( this );
solaris.addItemListener( this );
mac.addItemListener( this );
}
public void itemStateChanged( ItemEvent ie )
{
repaint( );
}
public void paint( Graphics g )
{
msg ="Current State:";
g.drawString( msg , 6 , 80 );
msg ="Windows 98/XP:"+win98.getState( );
g.drawString( msg , 6 , 100 );
msg ="Windows NT:"+winNT.getState( );
g.drawString( msg , 6 , 120 );
msg ="Solaris:"+solaris.getState( );
g.drawString( msg , 6 , 140 );
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 47
msg ="Apple's Macintosh:"+mac.getState( );
g.drawString( msg , 6 , 160 );
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 48
PROGRAM – 20
AIM:
Develop a program to demonstrate border layout.
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
public class ShowBorderLayout extends Frame
{
public ShowBorderLayout( )
{
setTitle("ShowBorderLayout");
setLayout( new BorderLayout( 5 , 10 ) );
add("East", new Button("India on the East") );
add("South", new Button("Australia on the South") );
add("West", new Button("America on the West") );
add("North", new Button("Britain on the North") );
add("Center", new Button("Africa on the Center") );
}
public static void main( String ar[ ] )
{
Frame f =new ShowBorderLayout();
f.setSize( 400 , 300 );
f.setVisible( true );
f.addWindowListener( new WindowAdapter()
{
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 49
public void windowClosing( WindowEvent evt )
{
System.exit( 0 );
}
});
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 50
PROGRAM – 21
AIM:
Develop a program to demonstrate grid layout.
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
public class ShowGridLayout extends Frame
{
public ShowGridLayout( )
{
setTitle("Grid Layout");
setLayout( new GridLayout( 4 , 3 , 5 , 5 ) );
for( int i =1 ; i <=10 ; i++)
{
add( new Button("Component#"+i) );
}
}
public static void main( String ar[ ] )
{
Frame f =new ShowGridLayout( );
f.setSize( 400 , 300 );
f.setVisible( true );
f.addWindowListener( new WindowAdapter( )
{
public void WindowClosing( WindowEvent evt )
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 51
{
System.exit( 0 );
}
});
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 52
PROGRAM – 22
AIM:
Develop a program to demonstrate GUI component "Label".
SOURCE CODE:
import java.awt.*;
import java.applet.*;
/*
<applet code="LabelDemo" width=100 height=100>
</applet>
*/
public class LabelDemo extends Applet
{
public void init()
{
Label one =new Label("My name");
Label two =new Label("is");
Label three =new Label("Namburi VK");
add(one);
add(two);
add(three);
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 53
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 54
PROGRAM – 23
AIM:
Develop a program to demonstrate GUI component "Button".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code="ButtonDemo"
width =250
height=150>
</applet>
*/
public class ButtonDemo extends Applet implements ActionListener
{
String msg =" ";
Button yes,no,maybe;
public void init()
{
yes=new Button("Yes");
no=new Button("No");
maybe=new Button("Undecided");
add(yes);
add(no);
add(maybe);
yes.addActionListener(this);
no.addActionListener(this);
maybe.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 55
{
String str =ae.getActionCommand();
if(str.equals("Yes"))
{
msg="You pressed Yes.";
}
else if (str.equals("No"))
{
msg="You pressed No.";
}
else
{
msg="You pressed Undecided.";
}
repaint();
}
public void paint(Graphics g)
{
g.drawString(msg,6,100);
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 56
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 57
PROGRAM – 24
AIM:
Develop a program to demonstrate GUI component "Checkbox".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code ="CheckboxDemo"
width=250
height=200 >
</applet>
*/
public class CheckboxDemo extends Applet implements ItemListener
{
String msg =" ";
Checkbox Win98, winNT,solaris,mac;
public void init()
{
Win98 =new Checkbox("Windows 98/XP",null,true);
winNT =new Checkbox("Windows NT/2000");
solaris =new Checkbox("Solaris");
mac =new Checkbox("Apple'sMac");
add(Win98);
add(winNT);
add(solaris);
add(mac);
Win98.addItemListener(this);
winNT.addItemListener(this);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 58
solaris.addItemListener(this);
mac.addItemListener(this);
}
public void itemStateChanged(ItemEvent ie)
{
repaint();
}
//Display current state of the check boxes.
public void paint(Graphics g)
{
msg=" Current state :";
g.drawString(msg,6,80);
msg=" Windows 98/XP:"+Win98.getState();
g.drawString(msg,6,100);
msg=" Windows NT/2000:"+winNT.getState();
g.drawString(msg,6,120);
msg=" Solaris :"+solaris.getState();
g.drawString(msg,6,140);
msg=" Apple's Macintosh: "+mac.getState();
g.drawString(msg,6,160);
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 59
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 60
PROGRAM – 25
AIM:
Develop a program to demonstrate GUI component
"CheckboxGroup".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/* <applet code ="CheckboxGroupDemo"
width=250
height=200>
</applet>
*/
public class CheckboxGroupDemo extends Applet implements ItemListener
{
String msg =" ";
Checkbox Win98,winNT,solaris,mac;
CheckboxGroup cbg;
public void init()
{
cbg=new CheckboxGroup();
Win98=new Checkbox("Windows 98/XP",cbg,true);
winNT=new Checkbox("Windows NT/2000",cbg,false);
solaris=new Checkbox("Solaris",cbg,false);
mac=new Checkbox("MacOS",cbg,false);
add(Win98);
add(winNT);
add(solaris);
add(mac);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 61
Win98.addItemListener(this);
winNT.addItemListener(this);
solaris.addItemListener(this);
mac.addItemListener(this);
}
public void itemStateChanged(ItemEvent ie)
{
repaint();
}
public void paint(Graphics g)
{
msg="Current selection: ";
msg+=cbg.getSelectedCheckbox().getLabel();
g.drawString(msg,6,100);
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 62
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 63
PROGRAM – 26
AIM:
Develop a program to demonstrate GUI component "Choice".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code ="ChoiceDemo"
width=300
height=180 >
</applet>
*/
public class ChoiceDemo extends Applet implements ItemListener
{
Choice os,browser;
String msg=" ";
public void init()
{
os=new Choice();
browser=new Choice();
//add items to os list
os.add("Windows 98/XP");
os.add("Windows NT/2000");
os.add("Solaris");
os.add("MacOS");
//add items to browser list
browser.add("Internet Explorer");
browser.add("Firefox");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 64
browser.add("Opera");
//add choice lists to window
add(os);
add(browser);
//register to receive item events
os.addItemListener(this);
browser.addItemListener(this);
}
public void itemStateChanged(ItemEvent ie)
{
repaint();
}
public void paint(Graphics g)
{
msg="Current OS:";
msg+=os.getSelectedItem();
g.drawString(msg,6,120);
msg="Current Browser: ";
msg+=browser.getSelectedItem();
g.drawString(msg,6,140);
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 65
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 66
PROGRAM – 27
AIM:
Develop a program to demonstrate GUI component "List".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code ="ListDemo"
width =500
height =300 >
</applet>
*/
public class ListDemo extends Applet implements ActionListener
{
List br , prg;
Label l1 , l2;
String msg ="";
public void init()
{
prg =new List( 2 , true );
br =new List( 5 , false );
l1 =new Label("Select a program:");
l2 =new Label("Select a branch:");
prg.add("B.Tech");
prg.add("M.Tech");
br.add("C.S.E");
br.add("I.T");
br.add("E.C.E");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 67
br.add("E.I.E");
br.add("E.E.E");
br.select( 1 );
add( l1 );
add( prg );
add( l2 );
add( br );
prg.addActionListener( this );
br.addActionListener( this );
}
public void actionPerformed( ActionEvent ae )
{
repaint();
}
public void paint( Graphics g )
{
int n[];
msg ="Program selected:";
n =prg.getSelectedIndexes();
for( int i =0 ; i <n.length ; i++)
{
msg +=prg.getItem( n[i] ) +" ";
}
g.drawString( msg , 6 , 120 );
msg ="Branch selected:";
msg +=br.getSelectedItem();
g.drawString( msg , 6 , 140 );
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 68
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 69
PROGRAM – 28
AIM:
Develop a program to demonstrate GUI component "TextField".
SOURCE CODE:
//program to calculate future value of an investment
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*<applet code ="TextFieldDemo"
width =250
height =250 >
</applet>
*/
public class TextFieldDemo extends Applet implements ActionListener
{
TextField intrate , intamnt;
Label l1 , l2;
public void init( )
{
intrate =new TextField(15);
intamnt =new TextField(10);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 70
l1 =new Label("NAME:",Label.RIGHT);
l2 =new Label("PASSWORD:",Label.RIGHT);
intamnt.setEchoChar('*');
add(l1);
add(intrate);
add(l2);
add(intamnt);
intrate.addActionListener( this );
intamnt.addActionListener( this );
}
public void actionPerformed( ActionEvent ae )
{
repaint( );
}
public void paint( Graphics g )
{
g.drawString("Name:" +intrate.getText( ) , 6 , 90 );
g.drawString("Selected text in name:" +intrate.getSelectedText( ) , 6 , 110 );
g.drawString("Password:" +intamnt.getText( ) , 6 , 130 );
} }
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 71
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 72
PROGRAM – 29
AIM:
Develop a program to demonstrate GUI component "TextArea".
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
<applet code ="TextAreaDemo"
width =500
height =400 >
</applet>
*/
public class TextAreaDemo extends Applet implements ActionListener
{
TextArea a;
Button b;
Label l1;
String msg ="";
public void init()
{
l1 =new Label("Write about yourself in less than 250 characters:");
b =new Button("SUBMIT");
a =new TextArea();
add( l1 );
add( a );
add( b );
b.addActionListener(this);
}
public void actionPerformed( ActionEvent ae )
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 73
{
String str =ae.getActionCommand();
if( str.equals("SUBMIT") )
{
msg ="Your answer is submitted!";
}
repaint();
}
public void paint( Graphics g )
{
g.drawString( msg , 180 , 250 );
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 74
PROGRAM – 30
AIM:
Develop an applet that receives three numeric values as input
from the user and then display the largest of the three.
SOURCE CODE:
import java.applet.*;
import java.awt.*;
/*<applet code ="Input3"
width =800
height =200>
</applet>*/
public class Input3 extends Applet
{
TextField txt1 , txt2 , txt3;
public void init()
{
txt1 =new TextField( 10 );
txt2 =new TextField( 10 );
txt3 =new TextField( 10 );
Label one =new Label("Enter the three input numbers:");
add( one );
add( txt1 );
add( txt2 );
add( txt3 );
/*txt1.setText("0");
txt2.setText("0");
txt3.setText("0");*/
}
public void paint( Graphics g )
{
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 75
int x =0 , y =0 , z =0 , l ,l1 , l2;
String s1 , s2 , s3 ,s;
try
{
s1 =txt1.getText();//if u don't give this code in try,u can remove
initializations of x , y , z and enter the comments of setText
x =Integer.parseInt( s1 );
s2 =txt2.getText();
y =Integer.parseInt( s2 );
s3 =txt3.getText();
z =Integer.parseInt( s3 );
}
catch( Exception e ){}
l1 =x >y ? x : y;
l2 =x >z ? x : z;
l =l1 >l2 ? l1 : l2;
s =String.valueOf( l );
g.drawString("The largest of the three numbers entered is:" , 20 , 120 );
g.drawString( s , 275 , 120 );
}
public boolean action( Event event , Object object )
{
repaint();
return true;
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 76
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 77
PROGRAM – 31
AIM:
Develop program to calculate the future value of an investment at
a given interest rate for a specified number of years. The formula for the
calculat ion is as follows:
Future value =Investment Amount (1+Interest Rate) years.
Use text fields for interest rate, investment amount and years. Display the
future amount in a textfield when clicking the calculate button, or
choosing calculate form the operation menu.
SOURCE CODE:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*<applet code ="FtrInvst"
width =250
height =250 >
</applet>*/
public class FtrInvst extends Applet implements ActionListener
{
TextField intrate , intamnt , yrs , futamnt;
Button cal;
Label l1 , l2 , l3 , l4;
public void init()
{
intrate =new TextField(5);
intamnt =new TextField(10);
yrs =new TextField(3);
futamnt =new TextField(15);
cal =new Button("CALCULATE");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 78
l1 =new Label("Interest Rate:",Label.RIGHT);
l2 =new Label("Investment Amount:",Label.RIGHT);
l3 =new Label("Number of years:",Label.RIGHT);
l4 =new Label("Future value of investment:",Label.RIGHT);
add(l1);
add(intrate);
add(l2);
add(intamnt);
add(l3);
add(yrs);
add(cal);
add(l4);
add(futamnt);
cal.addActionListener( this );
}
public void actionPerformed( ActionEvent ae )
{
float x =0 , y =0;
int z =0;
double f =0;
String s1 , s2 , s3 , s;
try
{
s1 =intrate.getText();
x =Float.parseFloat( s1 );
s2 =intamnt.getText();
y =Float.parseFloat( s2 );
s3 =yrs.getText();
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 79
z =Integer.parseInt( s3 );
}
catch( Exception e ){}
String str =ae.getActionCommand();
if( str.equals("CALCULATE") )
{
f =y * ( 1 +x ) * z;
}
s =String.valueOf( f );
futamnt.setText( s );
repaint();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 80
PROGRAM – 32
AIM:
Develop a program to meet the following requirements
(a) Create a frame with flow layout
(b) Create two panels and add the panels to the frame
(c) Each panel contains three buttons. The panel uses flow layout.
SOURCE CODE:
import java.awt.*;
public class PanFrReq extends Frame
{
public void init()
{
FlowLayout x=new FlowLayout();
setLayout(x);
Panel p1=new Panel();
p1.setSize(100,100);
Panel p2=new Panel();
p2.setSize(100,100);
Button btn1=new Button("B1");
Button btn2=new Button("B2");
Button btn3=new Button("B3");
Button btn4=new Button("B4");
Button btn5=new Button("B5");
Button btn6=new Button("B6");
p1.add(btn1);
p1.add(btn2);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 81
p1.add(btn3);
p2.add(btn4);
p2.add(btn5);
p2.add(btn6);
add(p1);
add(p2);
p1.setForeground( Color.red );
p2.setForeground( Color.blue );
setSize(500,500);
setVisible(true);
}
public static void main(String args[])
{
PanFrReq ob=new PanFrReq();
ob.init();
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 82
PROGRAM – 33
AIM:
Develop a program to display the mouse position when the mouse
is pressed.
SOURCE CODE:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/* <applet code ="MouseLoc"
width =400
height =200> </applet>*/
public class MouseLoc extends Applet
{
int x=0;
int y=0;
public void init()
{
addMouseListener(new mymouselistener());
}
public void start()
{
}
public void paint(Graphics g)
{
g.drawLine(x,y,x,y);
g.drawString(x +","+y, x,y);
}
public class mymouselistener extends MouseAdapter
{
public void mouseClicked(MouseEvent e)
{
x =e.getX();
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 83
y =e.getY();
repaint();
}
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 84
PROGRAM – 34
AIM:
Develop a program to handle mouse events.
SOURCE CODE:
import java.io.*;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
/*<applet code="Mouse"
width =400
height =300>
</applet>*/
public class Mouse extends Applet implements MouseListener,MouseMotionListener
{
String txt="";
int x=10,y=30;
public void init()
{
addMouseListener(this);
addMouseMotionListener(this);
}
public void mouseClicked(MouseEvent me)
{
txt="Mouse Clicked";
setForeground(Color.magenta);
repaint();
}
public void mouseEntered(MouseEvent me)
{
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 85
txt="Mouse Entered";
repaint();
}
public void mouseExited(MouseEvent me)
{
txt="Mouse Exited";
setForeground(Color.cyan);
repaint();
}
public void mousePressed(MouseEvent me)
{
txt="Mouse Pressed";
setForeground(Color.blue);
repaint();
}
public void mouseMoved(MouseEvent me)
{
txt="Mouse Moved";
setForeground(Color.red);
repaint();
}
public void mouseDragged(MouseEvent me)
{
txt="Mouse Dragged";
setForeground(Color.green);
repaint();
}
public void mouseReleased(MouseEvent me)
{
txt="Mouse Released";
setForeground(Color.gray);
repaint();
}
public void paint(Graphics g)
{
g.drawString(txt,200,150);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 86
showStatus("Mouse events Handling");
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 87
PROGRAM – 35
AIM:
Develop an applet to draw the following shapes.
1.Cone
2.Cylinder
3.Cube
4.Square inside a circle
5.Circle inside a square
SOURCE CODE:
import java.awt.*;
import java.applet.*;
/*<applet code=shapes
width=300
height=300>
</applet>*/
public class shapes extends Applet
{
public void paint(Graphics g)
{
g.drawOval(30,200,80,40);
g.drawLine(30,220,70,50);
g.drawLine(110,220,70,50);
g.drawString("cone",50,260);
g.drawOval(200,200,80,40);
g.drawOval(200,50,80,40);
g.drawLine(200,70,200,220);
g.drawLine(280,70,280,220);
g.drawString("cylinder",210,260);
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 88
g.drawRect(360,50,80,80);
g.drawRect(400,90,80,80);
g.drawLine(360,50,400,90);
g.drawLine(440,50,480,90);
g.drawLine(360,130,400,170);
g.drawLine(440,130,480,170);
g.drawString("cube",420,200);
g.drawRect(30,350,100,100);
g.drawOval(30,350,100,100);
g.drawString("circle in square",30,470);
g.drawOval(220,350,100,100);
g.drawRect(235,365,70,70);
g.drawString("square in circle",220,470);
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 89
PROGRAM – 36
AIM:
Develop an applet to display a bar chart by passing parameters to
applet.
SOURCE CODE:
/* <applet code="exBarChart"
height=300
width=350>
<param name ="totcol" value="4">
<param name ="c1" value ="110">
<param name ="c2" value ="150">
<param name ="c3" value ="100">
<param name ="c4" value ="170">
<param name ="lbl1" value ="2010">
<param name ="lbl2" value ="2011">
<param name ="lbl3" value ="2012">
<param name ="lbl4" value ="2013">
</applet>*/
import java.awt.*;
import java.applet.*;
public class exBarChart extends Applet
{
int n=0;
String label[];
int value[];
public void init()
{
try
{
n =Integer.parseInt(getParameter("totcol"));
label =new String[n];
value =new int[n];
label[0] =getParameter("lbl1");
label[1] =getParameter("lbl2");
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 90
label[2] =getParameter("lbl3");
label[3] =getParameter("lbl4");
value[0] =Integer.parseInt(getParameter("c1"));
value[1] =Integer.parseInt(getParameter("c2"));
value[2] =Integer.parseInt(getParameter("c3"));
value[3] =Integer.parseInt(getParameter("c4"));
}
catch(Exception e) {}
}
public void paint(Graphics g)
{
for (int i=0;i<n ;i++)
{
g.setColor(Color.red);
g.drawString(label[i],20,(i*50)+30);
g.setColor(Color.blue);
g.fillRect(50,(i*50)+10,value[i],40);
g.drawString(" " +value[i],value[i]+50,(i*50)+30);
}
}
}
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 91
PROGRAM – 37
AIM:
Develop an applet to display different bar charts by taking
different inputs.
SOURCE CODE:
import java.awt.*;
import java.lang.*;
import java.io.*;
import java.applet.*;
import java.util.Scanner;
import java.util.*;
/*
<applet code="Drawchart"
width=500
height=500 >
</applet>
*/
public class Drawchart extends Applet
{
int x[]=new int[10];
String y[]=new String[10];
int n;
public void init()
{
System.out.println("Enter the no.of bars in chart:");
Scanner a=new Scanner(System.in);
n=a.nextInt();
System.out.println("Enter titles of "+n+" bars:");
for(int j=0;j<=n;j++)
{
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 92
y[j]=a.nextLine();
}
for(int i=1;i<=n;i++)
{
System.out.println("Enter the value of bar" +i +":");
x[i]=a.nextInt();
}
}
public void paint(Graphics g)
{
g.drawString("The depicted bar graph is:",50,50);
for(int i=1;i<=n;i++)
{
g.setColor( Color.blue );
g.fillRect(150+(i*50),150-x[i],40,x[i]);
g.setColor( Color.red );
g.drawString(y[i],157+(i*50),170+30);
}
}
}
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 93
OUTPUT:
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 94
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 95
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 96
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 97
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 98
JAVA RECORD - 2/ 4 B4
CSE,GIT,GITAM University Page 99
