Listening to JCheckBox Events with a ChangeListener: listen to armed, pressed, selected, or released state : 多选框 « Swing


import javax.swing.AbstractButton;

import javax.swing.ButtonModel;

import javax.swing.JCheckBox;

import javax.swing.JFrame;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;



public class JCheckBoxChangeListener {

  public static void main(String args[]) {

    JFrame frame = new JFrame("Iconizing CheckBox");

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



    JCheckBox aCheckBox4 = new JCheckBox("Stuffed Crust");



    // Define ChangeListener

    ChangeListener changeListener = new ChangeListener() {

      public void stateChanged(ChangeEvent changeEvent) {

        AbstractButton abstractButton =

          (AbstractButton)changeEvent.getSource();

        ButtonModel buttonModel = abstractButton.getModel();

        boolean armed = buttonModel.isArmed();

        boolean pressed = buttonModel.isPressed();

        boolean selected = buttonModel.isSelected();

        System.out.println("Changed: " + armed + "/" + pressed + "/" +

          selected);

      }

    };



    aCheckBox4.addChangeListener(changeListener);

    frame.add(aCheckBox4);

    frame.setSize(300, 200);

    frame.setVisible(true);

  }

}

Listening to JCheckBox Events with a ChangeListener: listen to armed, pressed, selected, or released state : 多选框 « Swing « Java 教程