import java.awt.*;
import javax.swing.*;
public class TestBackgroundColor extends JFrame {
public static void main(String[] args) {
TestBackgroundColor tbc = new TestBackgroundColor();
tbc.setVisible(true);
}
private JPanel imagePanel;
private ImageIcon background;
public TestBackgroundColor() {
background = new ImageIcon("项目背景图片
JLabel label = new JLabel(background);//把背景图片显示在一个标签里面
//把标签的大小位置设置为图片刚好填充整个面板
label.setBounds(0,0,background.getIconWidth(),background.getIconHeight());
//把内容窗格转化为JPanel,否则不能用方法setOpaque()来使内容窗格透明
imagePanel = (JPanel)this.getContentPane();
imagePanel.setOpaque(false);
//内容窗格默认的布局管理器为BorderLayout
imagePanel.setLayout(new FlowLayout());
imagePanel.add(new JButton("测试按钮"));
this.getLayeredPane().setLayout(null);
//把背景图片添加到分层窗格的最底层作为背景
this.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(background.getIconWidth(),background.getIconHeight());
this.setVisible(true);
}
}