Round Robin

import java.awt.*; import javax.swing.*; import java.awt.event.*; class round extends JFrame implements ActionListener { JButton jb[]=new JButton[3]; JTextField jt1[],jt2[]; JLabel j1[],j11,j12,j13; JPanel jp,jp1; Container con; int k,p,q; String str[]={"SUBMIT","RESET","EXIT"}; String str1[]={"Process"," AT","WT","TAT"}; public round() { super("round scheduling algorithm"); con=getContentPane(); k=Integer.parseInt(JOptionPane.showInputDialog("E nter no. of processes:")); q=Integer.parseInt(JOptionPane.showInputDialog("E nter quantum time:")); j11=new JLabel("Process"); j12=new JLabel("arrival time"); j13=new JLabel("Service Time"); j1=new JLabel[k]; jt1=new JTextField[k]; jt2=new JTextField[k]; for(int i=0;i<k;i++) { j1[i]=new JLabel("Process"+(i+1)); jt1[i]=new JTextField(10); jt2[i]=new JTextField(10); } for(int i=0;i<3;i++) { jb[i]=new JButton(str[i]); } con.setLayout(new GridLayout(k+2,3)); con.add(j11); con.add(j12); con.add(j13); int l=0; for(int i=0;i<k;i++) { con.add(j1[l]); con.add(jt1[l]); con.add(jt2[l]); l++; } l=0; for(int i=0;i<3;i++) { con.add(jb[l]); jb[l].addActionListener(this); l++; } }

public static void main(String[] args) { round win=new round(); win.setSize(400,300); win.setVisible(true); win.setDefaultCloseOperation(JFrame.EXIT_ON_CL OSE); } public void actionPerformed(ActionEvent ae) { int a[]=new int[k]; int b[]=new int[k]; int p[]=new int[k]; int fb[]=new int[10]; int wait[]=new int[10]; int i,j,temp1,temp2,temp3; int wtc=0,lc=0,pn=0; int bb[]=new int[10]; int wt[]=new int[k]; int tat[]=new int[k]; float twt=0,ttat=0,avg; int fp[]=new int[30]; int ft[]=new int[30]; JPanel main=new JPanel(); main.setLayout(new BorderLayout()); jp=new JPanel(); jp1=new JPanel(); jp.setLayout(new GridLayout(k+1,7)); jp1.setLayout(new FlowLayout()); if(ae.getSource()==jb[2]) { System.exit(0); } else if(ae.getSource()==jb[0]) { for(i=0;i<k;i++) { a[i]=Integer.parseInt(jt1[i].getText()); b[i]=Integer.parseInt(jt2[i].getText()); p[i]=i+1; } for(i=0;i<k;i++) { for(j=i+1;j<k;j++) { if(a[i]>a[j]) { temp1=a[i]; a[i]=a[j]; a[j]=temp1; temp2=b[i]; b[i]=b[j]; b[j]=temp2; temp3=p[i]; p[i]=p[j]; p[j]=temp3; } }

} for(i=0;i<k;i++) { lc=b[i]+lc; fb[i]=b[i]; if(b[i]%q==0) bb[i]=(int)(b[i]/q)-1; else bb[i]=(int)(b[i]/q); } lc=lc/q+1; for(i=0;i<lc;i++) { for(j=0;j<k;j++) { if(b[j]>0) { wait[j]=wtc; if(b[j]>=q) { b[j]=b[j]-q; wtc+=q; } else { wtc+=b[j]; b[j]=b[j]-p[j]; } ft[pn]=wtc; fp[pn++]=p[j]; } } } for(i=0;i<k;i++) { wt[i]=(wait[i]-a[i])-(bb[i]*q); twt=twt+wt[i]; tat[i]=wt[i]+fb[i]; ttat=ttat+tat[i]; } for(i=0;i<4;i++) { jp.add(new JLabel(str1[i])); } for( i=0;i<k;i++) { jp.add(new JLabel("Process"+(p[i]))); jp.add(new JLabel(" "+a[i])); jp.add(new JLabel(" "+wt[i])); jp.add(new JLabel(" "+tat[i])); } avg=twt/k; String str2="Average Waiting time: "+avg; jp1.add(new JLabel(str2)); avg=ttat/k; str2="Average turn around time: "+avg; jp1.add(new JLabel(str2));

String str3=""; String str4="0 "; for(i=0;i<pn;i++) { str3+="P"+fp[i]+"|"; str4+=""+ft[i]+" "; } jp1.add(new JLabel(str3)); jp1.add(new JLabel(str4)); main.add(jp,BorderLayout.NORTH); main.add(jp1,BorderLayout.SOUTH); JOptionPane.showMessageDialog(null,main,"output", JOptionPane.PLAIN_MESSAGE); } else if(ae.getSource()==jb[1]) { setVisible(false); round win =new round(); win.setSize(400,300); win.setVisible(true); win.setDefaultCloseOperation(JFrame.EXIT_ON_CL OSE); } } }