在JFrame中设置背景图片 [英] Setting background images in JFrame

问题描述

可用于将图像设置为背景的任何方法的JFrame ？

Are any methods available to set an image as background in a JFrame?

推荐答案

有没有内置的方法，但有几个方法可以做到这一点。我可以在此刻想到的最简单的方法是：

There is no built-in method, but there are several ways to do it. The most straightforward way that I can think of at the moment is:

1. 创建的子类<一href=\"http://java.sun.com/javase/6/docs/api/javax/swing/JComponent.html\"><$c$c>JComponent.


2. 重写<一个href=\"http://java.sun.com/javase/6/docs/api/javax/swing/JComponent.html#paintComponent(java.awt.Graphics)\"><$c$c>paintComponent(Graphics G） 方法来作画要显示的图像。


3. Set内容窗格中的的JFrame 是这样的子类。

1. Create a subclass of JComponent.
2. Override the paintComponent(Graphics g) method to paint the image that you want to display.
3. Set the content pane of the JFrame to be this subclass.

一些示例code：

class ImagePanel extends JComponent {
    private Image image;
    public ImagePanel(Image image) {
        this.image = image;
    }
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(image, 0, 0, this);
    }
}

// elsewhere
BufferedImage myImage = ImageIO.load(...);
JFrame myJFrame = new JFrame("Image pane");
myJFrame.setContentPane(new ImagePanel(myImage));

请注意，这code不处理调整图像大小以适合的JFrame ，如果这就是你想要的。

Note that this code does not handle resizing the image to fit the JFrame, if that's what you wanted.

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