java 使用JDesktopPane

前提： java工程中src目录下创建文件夹res，其中添加图片文件

1.

public class TestJDesktopPane extends JFrame {

public TestJDesktopPane() {

setSize(400, 400);

setLocation(200, 100);

JPanel panel = new JPanel();

panel.setLayout(new BorderLayout());

TestDesktop desktop = new TestDesktop();

//
JFrame 缺省布局使用的是边界布局管理器(BorderLayout).

//JPanel 缺省布局使用的是流式布局管理器(FlowLayout).

panel.add(desktop, BorderLayout.CENTER);

setContentPane(panel);

// setContentPane(desktop, BorderLayout.CENTER);

setVisible(true);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new TestJDesktopPane();

}

}

2.

public class TestDesktop extends JDesktopPane {

private Image img;

public TestDesktop() {

URL url = TestDesktop.class.getResource("/res/1.gif");

img = new ImageIcon(url).getImage();

System.out.println(img);

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

// g.drawImage(img, 0, 0,getWidth(), getHeight(), this);

}

}