想实现一个效果：JToggleButton，当没按下去时显示绿色，按下去时显示黄色。
但不知为什么按下去后显示不出黄色来，而是默认的灰色。
请教各位高手，这是什么原因？以及要达到这个目的应该如何做！
非常感谢各位高手，有提示也欢迎，谢谢！
代码如下：
- Java code
package test24Buttons;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JToggleButton;public class Hour { JPanel timePanel = new JPanel(); JBusyTimeButton btn1 = new JBusyTimeButton("1"); JBusyTimeButton btn2 = new JBusyTimeButton("2"); JBusyTimeButton btn3 = new JBusyTimeButton("3"); JBusyTimeButton btn4 = new JBusyTimeButton("4"); JBusyTimeButton btn5 = new JBusyTimeButton("5"); JBusyTimeButton btn6 = new JBusyTimeButton("6"); public Hour() { timePanel.add(btn1); timePanel.add(btn2); timePanel.add(btn3); timePanel.add(btn4); timePanel.add(btn5); timePanel.add(btn6); } public JPanel getBusyTimePanel() { return timePanel; } public class JBusyTimeButton extends JToggleButton { private static final long serialVersionUID = 1L; public JBusyTimeButton(String text) { super(text); setBackground(Color.green); this.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (!((JToggleButton)e.getSource()).getModel().isSelected()) { ((JToggleButton)e.getSource()).setBackground(Color.green); } else { ((JToggleButton)e.getSource()).setBackground(Color.yellow); } } }); } } public static void main(String[] args) { JFrame frame = new JFrame(); Hour bt = new Hour(); frame.add(bt.getBusyTimePanel()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); }}------解决方案--------------------
我改了一下第一次按下是灰色的，第二次点击是黄色背景，我也不是很清楚为什么出现这个效果
发现如果设置前景色的话一切会是按照逻辑走
- Java code
import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class Hour { JPanel timePanel = new JPanel(); JBusyTimeButton btn1 = new JBusyTimeButton("1"); JBusyTimeButton btn2 = new JBusyTimeButton("2"); JBusyTimeButton btn3 = new JBusyTimeButton("3"); JBusyTimeButton btn4 = new JBusyTimeButton("4"); JBusyTimeButton btn5 = new JBusyTimeButton("5"); JBusyTimeButton btn6 = new JBusyTimeButton("6"); public Hour() { timePanel.add(btn1); timePanel.add(btn2); timePanel.add(btn3); timePanel.add(btn4); timePanel.add(btn5); timePanel.add(btn6); } public JPanel getBusyTimePanel() { return timePanel; } public class JBusyTimeButton extends JToggleButton { private static final long serialVersionUID = 1L; public JBusyTimeButton(String text) { super(text); setBackground(Color.green); this.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {// if (!((JToggleButton)e.getSource()).isSelected()) {// ((JToggleButton)e.getSource()).setBackground(Color.green);// } else {// ((JToggleButton)e.getSource()).setBackground(Color.YELLOW);// } JToggleButton j=(JToggleButton)e.getSource(); ButtonModel bm=j.getModel(); if(bm.isSelected()) { j.setBackground(Color.YELLOW); System.out.println("奇数次按下，更改颜色"); } } }); } } public static void main(String[] args) { JFrame frame = new JFrame(); Hour bt = new Hour(); frame.add(bt.getBusyTimePanel()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); }}