bufferimage中的图像怎么绘制在jpanel中那

http://www.oschina.net/question/573224_61486


JFileChooser chooser = newJFileChooser(".");

if(chooser.showOpenDialog(frame) == JFileChooser.APPROVE_OPTION) {

    BufferedImage image = ImageIO.read(chooser.getSelectedFile());

    frame.myPanel.setImage(image);

    // 重绘

    frame.validate();

    // 也可以用frame.myPanel.repaint();

}







publicclassMyPanel extendsJPanel {

    privatestaticfinal long serialVersionUID = 1L;

 

    privateBufferedImage image = null;

 

    publicMyPanel() {

    }

 

    @Override

    protectedvoidpaintComponent(Graphics graphics) {

        if(image == null) {

            super.paintComponent(graphics);

        }else{

            graphics.drawImage(image,0,0,this.getWidth(),this.getHeight(),this);

        }

    }

 

    publicBufferedImage getImage() {

        returnimage;

    }

 

    publicvoidsetImage(BufferedImage image) {

        this.image = image;

    }

}