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Title FIRST COME FIRST SERVED
Author PEMMASANI HARI KRISHNA
Author Email KRISHNAPEMMASANI [at] GMAIL.COM
Description THIS IS A PROGRAM ON FIRST COME FIRST SERVED PROCESS
SCHEDULING ALGORITHAM OF TYPE NONPREEMPTIVE SCHEDULING ALGORITHAM.THIS
ALGORITHAM HELPS YOU TO ANALYSE THE FCFS CLEARLY AND AND ALSO
CALCULATES
SOME PARAMETERS WHICH ARE GOING TO BE MENTIONED .

Category Java » Java Swing
Hits 48343
Code Select and Copy the Code
import javax.swing.*; import java.awt.*; import java.awt.event.*; class fcfs extends JFrame implements ActionListener { JButton jb[] = new JButton[3]; JTextField jt1[],jt2[]; JLabel jl[],jl1,jl2,jl3; JPanel jp,jp1; Container con; int k,p; String str[] = {"SUBMIT","RESET","EXIT"}; String str1[] = {"Process"," AT","ST","WT","FT","TAT","NTAT"}; public fcfs() { super("fcfs scheduling algoritham"); con = getContentPane(); k= Integer.parseInt(JOptionPane.showInputDialog("Enter number of process")); jl1 = new JLabel("Process"); jl2 = new JLabel("Arival Time"); jl3 = new JLabel("Service Time"); jl = new JLabel[k]; jt1 = new JTextField[k]; jt2 = new JTextField[k]; for(int i=0;i<k;i++) { jl[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(jl1); con.add(jl2); con.add(jl3); int l=0; for(int i=0;i<k;i++) { con.add(jl[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++; } }//end of constructor public void actionPerformed(ActionEvent ae) { int FT[] = new int[k]; int WT[] = new int[k]; int TAT[] = new int[k]; float NTAT[] = new float[k]; float sum=0; float avg; 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]) { FT[0] = Integer.parseInt(jt1[0].getText()) + Integer.parseInt(jt2[0].getText()); for(int i=0;i<k;i++) { if(i==0) { WT[i] = 0; } else { if(FT[i-1] < Integer.parseInt(jt1[i].getText())) { FT[i] = Integer.parseInt(jt1[i].getText())+Integer.parseInt(jt2[i].getText()); WT[i] = 0; } else { FT[i] = FT[i-1] + Integer.parseInt(jt2[i].getText()); WT[i] = FT[i-1] - Integer.parseInt(jt1[i].getText()); } } TAT[i] = WT[i]+Integer.parseInt(jt2[i].getText()); NTAT[i] = TAT[i]/(Integer.parseInt(jt2[i].getText())); sum = sum+WT[i]; }//end for loop for (int i=0;i<7;i++ ) { jp.add(new JLabel(str1[i])); } for (int i=0;i<k;i++) { jp.add(new JLabel("process"+(i+1))); jp.add(new JLabel(" "+Integer.parseInt(jt1[i].getText()))); jp.add(new JLabel(""+Integer.parseInt(jt2[i].getText()))); jp.add(new JLabel(""+WT[i])); jp.add(new JLabel(""+FT[i])); jp.add(new JLabel(""+TAT[i])); jp.add(new JLabel(""+NTAT[i])); } avg = sum/k; String str2 = "Average Waiting Time is "+ avg; jp1.add(new JLabel(str2)); 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); fcfs window = new fcfs(); window.setSize(400,300); window.setVisible(true); window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }//END ACTION PERFORMED public static void main(String[] args) { fcfs window = new fcfs(); window.setSize(400,300); window.setVisible(true); window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }//end main }//end class

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