Java code for button

[Owen Fernandes]

Hello Friends,

I studying the advanced programming on JAVA. Advanced java programming seems to be more difficult to understand than core JAVA programming. Now I want to code the java program for button, but I don't have any idea about it.
If you any java code Java code for button , then please let me know that. I would appreciate your help.

[Praetor]

Refer following java program for button:

import java.awt.event.*;
import java.awt.*;

public class ButtonDemo {
public static void main(String args[])
{
Button b;
ActionListener a1 = new MyActionListener();

Frame f1 = new Frame("Java Applet");

f1.add(b1 = new Button("BonjourDemo"), BorderLayout.SOUTH);

b1.setActionCommand("Welcome");

b1.addActionListener(a1);

f1.add(b1 = new Button("NIce day"), BorderLayout.SOUTH);

b1.addActionListener(a1);
b1.addActionListener(a1);

f1.pack();

f1.show();
}
}

class MyActionListenerDemo implements ActionListener {

public void actionPerformed(ActionEvent ae)
{
String s1 = ae1.getActionCommand();

if (s1.equals("ButtonName")) {
System.exit(0);
}
else if (s1.equals("BonjourDemo")) {
System.out.println("Welcome");
}

}
}

[Katty]

If you want to include the buttons, check boxes in java the use following different java classes for that:

• JButton(A common button)
• JRadioButton(One of a group of radio buttons)
• JCheckBoxMenuItem(A menu item that has a check box)
• JToggleButton(Implements toggle functionality inherited by JCheckBox and JRadioButton)
• JCheckBox(A check box button)

[kelfro]

Hi,

I have following java event program. In which I have used the "MyActionListener " class concept to fire the various events for buttons.

import java.awt.event.*;

class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent ae) {
String s = ae.getActionCommand();
if (s.equals("Hello"))
{
System.out.println("Hello everyone");

}
else {
System.exit(0);
}
}
}
public class JavaButtonDemo {
public static void main(String[] args){
Button b;
ActionListener ab = new MyActionListener();
Frame fk = new Frame("java");
fk.add(lb = new Button("Hello"), BorderLayout.NORTH);

bl.setActionCommand("Hello");
bl.addActionListener(ab);
fk.pack();
fk.show();
}
}

[Zecho]

Hi,
To code the java program for button, you need to use the properties of the "ActionListener" class . The "ActionListener" basically comprises properties like "setActionCommand", "addActionListener", "getActionCommand". setActionCommand is used to pass the value to the getActionCommand. The you need to put the code hat you want to apply for button into the "getActionCommand". You can use nore than one events to the single button in the java. You can also use the multiple button in the single program.

[D_chapple]

To code for "actionPerformed" method use the following code for reference. I have used multiple properties of the "actionPerformed" method in this java program for button.

public void actionPerformed(ActionEvent p)
{
if ("emp".Equals(p.getActionCommand()))
{
m1.setEnabled(true);
m2.setEnabled(false);
m3.setEnabled(false);

}
else
{
m1.setEnabled(False);
m2.setEnabled(true);
m3.setEnabled(true);
}
}