Exit button in applet

Question

hi u see in the code that i have made a button an exit button and i did this code but when i run the code is fine but when i click the exit button it dos not clos the applet
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
public class assignment2_1 extends Applet implements ActionListener {
JTextField ID, Mark;
JLabel IdLabel, MarkLabel;
JButton ExitButton;
JTextArea Disply;
String stnum;
int studentnum;
int stid;
int assimak;
public void init() {
GridBagLayout GBL = new GridBagLayout();
GridBagConstraints cr= new GridBagConstraints();
setLayout(GBL);
setBackground(Color.lightGray);
cr.weightx=cr.weighty = 2.0;
cr.gridx=1; cr.gridy =2;
cr.gridheight = 1; cr.gridwidth = 2;
add(IdLabel=new JLabel("Enter Student ID"),cr);
// IdLabel.setBackground(Color.lightGray);
cr.weightx=cr.weighty = 2.0;
cr.gridx=5; cr.gridy =2;
cr.gridheight = 1; cr.gridwidth = 2;
add(ID = new JTextField(9),cr);
cr.weightx=cr.weighty = 2.0;
cr.gridx=1; cr.gridy =3;
cr.gridheight = 1; cr.gridwidth = 2;
add(MarkLabel=new JLabel("Enter Assignment Mark"),cr);
// MarkLabel.setBackground(Color.lightGray);
cr.weightx=cr.weighty = 2.0;
cr.gridx=5; cr.gridy =3;
cr.gridheight = 1; cr.gridwidth = 2;
add(Mark=new JTextField(9),cr);
Mark.addActionListener( this );
cr.weightx=cr.weighty = 2.0;
cr.gridx=1; cr.gridy =4;
cr.gridheight = 1; cr.gridwidth = 2;
add(Disply=new JTextArea(10, 20),cr);
Disply.setEditable(false);
// Disply.setBackground(Color.lightGray);
cr.weightx=cr.weighty = 1.0;
cr.gridx=5; cr.gridy =5;
cr.gridheight = 1; cr.gridwidth = 2;
add(ExitButton=new JButton("Exit"),cr);
ExitButton.addActionListener( this );
/* Container container = getContentPane();
container.setLayout( new FlowLayout() );
IdLabel = new JLabel("Enter Student ID ");
container.add( IdLabel );
ID = new JTextField(9);
container.add( ID );
MarkLabel = new JLabel("Enter Assignment Mark ");
container.add( MarkLabel );
Mark = new JTextField(5);
Mark.addActionListener( this );
container.add( Mark );
Disply = new JTextArea( 10, 20);
Disply.setEditable(false);
container.add( Disply );
ExitButton = new JButton("Exit");
ExitButton.addActionListener( this );
container.add( ExitButton );
stnum = JOptionPane.showInputDialog( "Enter total assignment" );
public void actionPerformed(ActionEvent evt) {
studentnum = Integer.parseInt( stnum );
stid = Integer.parseInt(ID.getText());
assimak = Integer.parseInt(Mark.getText());
if (evt.getSource() == Mark)
showStatus ("heeeea "+ studentnum);
if (evt.getSource() == ExitButton )
System.exit(0);

Answer 1

U wrote:
if (evt.getSource() == ExitButton )
System.exit(0);
Try the following:
assign a ActionCommandString to your Button using the setActionCommand-Method and then, in the ActionListerner:
if (evt.getActionCommand().equals("Exit"))
stop();