Listener for button press wherever in the frame

Question

I have a frame and it has to listen to button press whatever element is selected. Is it possible to make a global listener for this frame, or I have to write listeners for every element I have?

Answer 1

Write a MouseListener/MouseAdapter and share the same instance with all the elements you want to react to.

This other question will give you a clue: Java MouseListener

Answer 2

I'm not sure this is what you want. You can make those buttons use the same action listener,

//set up some buttons...
bt1 = new JButton("BUTTON1");
bt2 = new JButton("BUTTON2");
//use the same actionListener
bt1.addActionListener(someActionListener);
bt2.addActionListener(someActionListener);

then in actionPerformed method you can check which button was pressed.

public void actionPerformed(ActionEvent e){
    JButton pressedButton = (JButton)e.getSource();

//check which button was pressed

    if(pressedButton ==bt1)
        System.out.println("Button 1 do something");
    else if(pressedButton ==bt2)
        System.out.println("Button 2 do something");
}