从另一个按钮更改切换按钮的状态

Question

我正在使用Swing with Eclipse和Window Builder Pro创建Java GUI.我正在使用JButtons和JToggleButtons.我想从另一个按钮更改切换按钮的状态.

例如,当我单击清除网格时,所有切换按钮都将被"未选中".

我怎样才能做到这一点？我必须使用哪些方法来切换按钮和按钮？

Answer 1

将actionListener 添加到您的JButton 中，并在actionPerformed(ActionEvent) 方法中更改所有JToggleButton 的状态。确保所有 JToggleButton 都可以在此方法中访问。一个简单的例子是..

    JFrame frame = new JFrame("Panel image demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 400);
    frame.setLayout(new FlowLayout());

    final JToggleButton[] button = new JToggleButton[10];
    for (int i = 0; i < button.length; i++) {
        button[i] = new JToggleButton("Toggle Us");
        frame.add(button[i]);
    }
    JButton jButton = new JButton("Toggle that button");
    jButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            for (JToggleButton jToggleButton : button) {
                jToggleButton.setSelected(!jToggleButton.isSelected()); // <-- this will change the state of toggle button
            }
        }
    });

    frame.add(jButton);
    frame.setVisible(true);

Answer 2

toggleButton.setSelected(boolean b)

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JToggleButton;

public class JToggleButtonAction {

    public static void main(String args[]) {
        JFrame frame = new JFrame("Selecting Toggle");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JToggleButton toggleButton = new JToggleButton("Toggle Button");
        final JToggleButton toggleButton1 = new JToggleButton("Another Toggle Button");
        ActionListener actionListener = new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();
                boolean selected = abstractButton.getModel().isSelected();
                System.out.println("Action - selected=" + selected + "\n");
                toggleButton1.setSelected(selected);
            }
        };
        toggleButton.addActionListener(actionListener);
        frame.add(toggleButton, BorderLayout.NORTH);
        frame.add(toggleButton1, BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
    }
}