BufferedImage img = new BufferedImage(16,16,BufferedImage.TYPE_INT_RGB);
    Graphics g = img.getGraphics();
    g.setColor(Color.GREEN);
    g.fillRect(0,16);
    byte[] imgBytes = getImgBytes(img);
    int fileSize = imgBytes.length + 22;
    ByteBuffer bytes = ByteBuffer.allocate(fileSize);
    bytes.order(ByteOrder.LITTLE_ENDIAN);
    bytes.putShort((short) 0);//Reserved must be 0
    bytes.putShort((short) 1);//Image type
    bytes.putShort((short) 1);//Number of image in file
    bytes.put((byte) img.getWidth());//image width
    bytes.put((byte) img.getHeight());//image height
    bytes.put((byte) 0);//number of colors in color palette
    bytes.put((byte) 0);//reserved must be 0
    bytes.putShort((short) 0);//color planes
    bytes.putShort((short) 0);//bits per pixel
    bytes.putInt(imgBytes.length);//image size
    bytes.putInt(22);//image offset
    bytes.put(imgBytes);
    byte[] result = bytes.array();
    FileOutputStream fos = new FileOutputStream("C://Users//Owner//Desktop//picture.ico");
    fos.write(result);
    fos.close();
    fos.flush();

private static byte[] getImgBytes(BufferedImage img) throws IOException
{
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ImageIO.write(img,"png",bos);
    return bos.toByteArray();
}

问题是窗口似乎无法打开图像,当我尝试使用Windows照片库打开图像时出现错误.但是,当我尝试使用gimp打开图像时,图像打开正常.我究竟做错了什么.我觉得我正在搞乱文件头中的东西.编辑：即使陌生人在桌面上的图片看起来正确,只是不是当我尝试打开它.

在我的桌面上,图像看起来像这样

当我尝试在Windows照片库中打开它时会显示此错误

在png尝试失败后,我尝试使用位图图像,而这是我的新代码

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.HeadlessException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;

import javax.imageio.ImageIO;

public class IconWriter
{
    public static void main(String[] args) throws HeadlessException,AWTException,IOException
    {
        BufferedImage img = new BufferedImage(16,BufferedImage.TYPE_INT_RGB);
        Graphics g = img.getGraphics();
        g.setColor(Color.GREEN);
        g.fillRect(0,16);
        byte[] imgBytes = getImgBytes(img);
        int fileSize = imgBytes.length + 22;
        ByteBuffer bytes = ByteBuffer.allocate(fileSize);
        bytes.order(ByteOrder.LITTLE_ENDIAN);
        bytes.putShort((short) 0);//Reserved must be 0
        bytes.putShort((short) 1);//Image type
        bytes.putShort((short) 1);//Number of images in file
        bytes.put((byte) img.getWidth());//image width
        bytes.put((byte) img.getHeight());//image height
        bytes.put((byte) 0);//number of colors in color palette
        bytes.put((byte) 0);//reserved must be 0
        bytes.putShort((short) 0);//color planes
        bytes.putShort((short) 0);//bits per pixel
        bytes.putInt(imgBytes.length);//image size
        bytes.putInt(22);//image offset
        bytes.put(imgBytes);
        byte[] result = bytes.array();
        FileOutputStream fos = new FileOutputStream("C://Users//Owner//Desktop//hi.ico");
        fos.write(result);
        fos.close();
        fos.flush();
    }

    private static byte[] getImgBytes(BufferedImage img) throws IOException
    {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ImageIO.write(img,"bmp",bos);
        byte[] bytes = bos.toByteArray();
        return Arrays.copyOfRange(bytes,14,bytes.length);
    }
}

现在,当我尝试在照片库中打开我的图像时,图像看起来像这样我不知道为什么它现在不工作,特别是为什么奇怪的线条出现,虽然我怀疑它必须与彩色飞机属性在ico图像标题.