How can I Define a JFrame subclass that has four vertically positioned buttons.

Hi Friend,

Try the following code:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class DisplayButtons extends JFrame {
int i=0;
static JPanel panel;
public DisplayButtons(){
JButton[] buttons = new JButton[4];
panel=new JPanel(new GridLayout(4,1));
String b[]={"Senior","Junior","Sophomore","Freshman"};
for(i = 0; i < buttons.length; i++) {
buttons[i] = new JButton(b[i]);
buttons[i].setSize(80, 80);
buttons[i].setActionCommand(b[i]);
buttons[i].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
String choice = e.getActionCommand();
JOptionPane.showMessageDialog(null, "You have clicked: "+choice);
}
});
panel.add(buttons[i]);
}
}
public static void main(String[]args){
DisplayButtons frame=new DisplayButtons();
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
}

For more information, visit the following link:

http://www.roseindia.net/java/example/java/swing/create_multiple_buttons_using_ja.shtml

Thanks