设置JButton在不同状态的图片

设置JButton在不同状态的图片

1.源代码：
//<wbr><wbr> 创建并设置一个登录按钮，并将其添加到用来添加按钮的面板中
<wbr><wbr>final JButton landButton = new JButton();// 创建登录按钮组件对象
<wbr><wbr>landButton.setMargin(new Insets(0, 0, 0, 0));// 设置按钮边框和标签之间的间隔
<wbr><wbr>landButton.setContentAreaFilled(false);// 设置不绘制按钮的内容区域
<wbr><wbr>landButton.setBorderPainted(false);// 设置不绘制按钮的边框
<wbr><wbr>URL landUrl = this.getClass().getResource("/land_submit.png");// 获得默认情况下登录按钮显示图片的URL
<wbr><wbr>landButton.setIcon(new ImageIcon(landUrl));// 设置默认情况下登录按钮显示的图片
<wbr><wbr>URL landOverUrl = this.getClass().getResource(
<wbr><wbr><wbr><wbr>"/land_submit_over.png");// 获得当鼠标经过登录按钮时显示图片的URL
<wbr><wbr>landButton.setRolloverIcon(new ImageIcon(landOverUrl));// 设置当鼠标经过登录按钮时显示的图片
<wbr><wbr>URL landPressedUrl = this.getClass().getResource(
<wbr><wbr><wbr><wbr>"/land_submit_pressed.png");// 获得当登录按钮被按下时显示图片的URL
<wbr><wbr>landButton.setPressedIcon(new ImageIcon(landPressedUrl));// 设置当登录按钮被按下时显示的图片
</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr>landButton.addActionListener(new LandButtonActionListener<wbr>());// 为登录按钮添加事件监听器
<wbr><wbr>buttonPanel.add(landButton);// 将登录按钮添加到用来添加按钮的面板中</wbr></wbr></wbr></wbr></wbr>
2.相关代码：
class LandButtonActionListener<wbr> implements ActionListener {</wbr>
<wbr><wbr><wbr><wbr><wbr> public void actionPerformed(ActionEvent e){</wbr></wbr></wbr></wbr></wbr>
}
}
3.又一个例子
<wbr>final MButton passwordButton = new MButton();
<wbr><wbr>URL passwordUrl = this.getClass().getResource("/img/password.png");
<wbr><wbr>passwordButton.setIcon(new ImageIcon(passwordUrl));
<wbr><wbr>URL passwordOverUrl = this.getClass().getResource(
<wbr><wbr><wbr><wbr>"/img/password_over.png");
<wbr><wbr>passwordButton.setRolloverIcon(new ImageIcon(passwordOverUrl));
<wbr><wbr>toolBar.add(passwordButton);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>