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JPanel的图像转播
原标题:image resize to fit on JPanel

我有将装上图像的JPanel。

由于图像不会像JPanel那样有同样的宽度和高度,我想要使图像转播并适合JPanel。

最佳回答

阅读本条: The Perils of Value.getScaledInstance()

现在, 阁下,希望<>

Image scaledImage = originalImage.getScaledInstance(jPanel.getWidth(),jPanel.getHeight(),Image.SCALE_SMOOTH);

在将图像装上您的JPanel之前,可能像讨论过的in。 页: 1

问题回答

我知道这一点是老的,但也许会帮助其他人。

采用这种分类,而不是使用普通的JLabel,并在使用Icon(#)时通过图像Icon;

private class ImageLabel extends JLabel{
    private Image _myimage;

    public ImageLabel(String text){
        super(text);
    }

    public void setIcon(Icon icon) {
        super.setIcon(icon);
        if (icon instanceof ImageIcon)
        {
            _myimage = ((ImageIcon) icon).getImage();
        }
    }

    @Override
    public void paint(Graphics g){
        g.drawImage(_myimage, 0, 0, this.getWidth(), this.getHeight(), null);
    }
}




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