Multiple buttons mouse click

Question

This is my code:

package saaaaaaaaaa;

public class xd {
    public static JFrame frame = new JFrame("Halo");
    public static JLabel lab = new JLabel("learning ",JLabel.CENTER);
    public static JButton but = new JButton("but");
    public static JButton but1 = new JButton("butt");
    public static CustomAct act = new CustomAct(lab);

    public static void main(String[] args) {
        but.addMouseListener(act);
        but1.addMouseListener(act);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(640, 480);
        frame.setLayout(new BorderLayout());
        frame.setResizable(false);
        frame.add(lab, BorderLayout.CENTER);
        frame.add(but, BorderLayout.SOUTH);
        frame.add(but1, BorderLayout.NORTH);
    }
}

This is extra class for mouse click, I need 2x mouse click for 2 buttons.

package saaaaaaaaaa;

public class CustomAct implements MouseListener {
    private static final long serialVersionUID = 1L;
    private String halo = "this is ";
    private int getClickCount = 1;
    private JLabel lab;
    private JLabel lab1;

    public CustomAct(JLabel lab) {
        this.lab = lab;
    }

    public void mouseClicked(MouseEvent e) {
        if(e.getSource()==but) {
            lab.setText("cau"+getClickCount++);
        }
    }

    @Override
    public void mouseEntered(MouseEvent e) {
    }

    @Override
    public void mouseExited(MouseEvent e) {
    }

    @Override
    public void mousePressed(MouseEvent e) {
    }

    @Override
    public void mouseReleased(MouseEvent e) {
    }
}

How can I do a multiple buttons for each different mouse click action?

How can I get ID of button, which is used?

This is if(e.getSource()==but) --- but cannot be resolved to a variable

I really don't know how to do it.

score 0 · Answer 1 · answered Nov 03 '18 at 15:18

First of all you don't use a MouseListener to listen for clicks on a button.

Instead you should be using an ActionListener.

If the Action for each button is unrelated, then you need to create a separate ActionListener for each button with each ActionListener containing the specific code for the button. For example the "Add" and "Subtract" methods of a simple calculator would require a separate Action.

If the Action is related, then you would create a generic ActionListener that can be shared by the buttons. For example, entering digits 0, 1, 2, ... could be a shared ActionListener. For a working example of this approach check out: How to add a shortcut key for a jbutton in java?

Also, you should NOT be using static variables. Instead you should be create a class that extends a JPanel where you define all your variables and Swing components. The ActionListeners would also be defined in that class so they can update the labels as required.

Multiple buttons mouse click

1 Answers1