如何在Java中将.TIF图像设置为ImageIcon? [英] How to set .TIF image to ImageIcon in java?

问题描述

有人可以建议我如何将.TIF格式的图像存储到ImageIcon并将该图像添加到列表模型中吗?我试过了，但是给了我java.lang.NullPointerException.

Could anyone suggest me how to store .TIF formatted image to ImageIcon and add this image to list model? I tried this but gives me java.lang.NullPointerException.

  public static void main(String[] args) throws Exception {
    String path = "C:\\project\\aimages";
    JFrame frame = new JFrame();
    frame.setSize(500, 500);
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    File folder = new File(path);
    File[] listOfFiles = folder.listFiles();
    DefaultListModel listModel = new DefaultListModel();
    System.out.println("listOfFiles.length="+listOfFiles.length);
    int count = 0;
    for (int i = 0; i < listOfFiles.length; i++) {
        //System.out.println("check path"+listOfFiles[i]);
        String name = listOfFiles[i].toString();
         System.out.println("name"+name);
        // load only JPEGs
        if (name.endsWith("jpg") || name.endsWith("JPG")|| name.endsWith("tif") || name.endsWith("TIF")) {
            if(name.endsWith("tif") || name.endsWith("TIF"))
            { 
                BufferedImage image = ImageIO.read(listOfFiles[i]);
           BufferedImage convertedImage = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
              ImageIcon ii = new ImageIcon(image);
                    Image img1 = ii.getImage();
                Image newimg = img1.getScaledInstance(75, 75, java.awt.Image.SCALE_SMOOTH);
                   ImageIcon newIcon = new ImageIcon(img1);
                  listModel.add(count++, newIcon);
            }
            else
            {
              ImageIcon ii = new ImageIcon(ImageIO.read(listOfFiles[i]));
              Image img1 = ii.getImage();
              Image newimg = img1.getScaledInstance(75, 75, java.awt.Image.SCALE_SMOOTH);
              ImageIcon newIcon = new ImageIcon(newimg);
             listModel.add(count++, newIcon);
            }
        }
    }
    JList p2 = new JList(listModel);

    }
     }

在这里我已经编辑了代码，这是我的错误信息 线程主"中的异常java.lang.NullPointerException 在javax.swing.ImageIcon(ImageIcon.java:228) 在ListImage1.main(ListImage1.java:48)

here i had edited my code and this is my error msg Exception in thread "main" java.lang.NullPointerException at javax.swing.ImageIcon.(ImageIcon.java:228) at ListImage1.main(ListImage1.java:48)

推荐答案

如果TIFF是应用程序资源，则最好将其转换为JPG或PNG.

If the TIFF is an application resource, probably better to convert it to JPG or PNG.

OTOH，我相信 JAI 支持阅读TIFF

OTOH, I believe that JAI offers support for reading TIFF.

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