java - 缓冲图像调整大小

Question

我正在尝试调整缓冲图像的大小。我能够存储它并显示在 jframe 上没有问题，但我似乎无法调整它的大小。关于如何更改它以使其工作并将图像显示为 200*200 文件的任何提示都会很棒

private void profPic(){
    String path = factory.getString("bottle");
    BufferedImage img = ImageIO.read(new File(path));
}


public static BufferedImage resize(BufferedImage img, int newW, int newH) {  
    int w = img.getWidth();  
    int h = img.getHeight();  
    BufferedImage dimg = new BufferedImage(newW, newH, img.getType());  
    Graphics2D g = dimg.createGraphics();  
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
    RenderingHints.VALUE_INTERPOLATION_BILINEAR);  
    g.drawImage(img, 0, 0, newW, newH, 0, 0, w, h, null);  
    g.dispose();  
    return dimg;  
}  

Answer 1

更新答案

我不记得为什么 my original answer工作但在单独的环境中对其进行了测试，我同意，原来接受的答案不起作用(为什么我说它我也不记得了)。另一方面，这确实有效:

public static BufferedImage resize(BufferedImage img, int newW, int newH) { 
    Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
    BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB);

    Graphics2D g2d = dimg.createGraphics();
    g2d.drawImage(tmp, 0, 0, null);
    g2d.dispose();

    return dimg;
}