java 如何在 JDesktopPane 中设置背景图像
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How to set Background image in JDesktopPane
提问by Majda
I want to set the background of the JDesktopPane (I add this JDesktopPanedirectly from the palette into the JFrame)
我想设置 JDesktopPane 的背景（我JDesktopPane直接从调色板添加到JFrame）
I try to override the method public void paintComponent (Graphics g)but it's not working
我尝试覆盖该方法 public void paintComponent (Graphics g)但它不起作用
Here is the code:
这是代码：
JDesktop p = new JDesktop();
ImageIcon icon = new ImageIcon("images/Nénuphars6892.jpg");
final Image img = icon.getImage();
img.getScaledInstance(159, 207, Image.SCALE_SMOOTH);
p.principal = new JDesktopPane() {
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.drawImage(img, 0, 0, getSize().width, getSize().height, this);
}
};
p.setVisible(true);
回答by Majda
I resolve this problem by adding that on the creation of the JDesktopPane choosing customize code(variable principal) :
我通过在选择自定义代码（变量主体）的 JDesktopPane 创建时添加来解决这个问题：
principal = new javax.swing.JDesktopPane()
{
ImageIcon icon = new ImageIcon("images/blue_digital_waves_abstract.jpg");
Image image = icon.getImage();
Image newimage = image.getScaledInstance(1500, 1000, Image.SCALE_SMOOTH);
@Override
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawImage(newimage, 0, 0, this);
}
}
;
回答by Eason Xiao
JDesktopPane desktopPane = new JDesktopPane() {
private final ImageIcon image = new ImageIcon("sample.jpg");;
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int x = (desktopPane.getWidth() - image.getIconWidth()) / 2;
int y = (desktopPane.getHeight() - image.getIconHeight()) / 2;
g.drawImage(image.getImage(), x, y, this);
}
};
