java - 读取图像时出错

当我尝试使用打开一个简单的smile.png图像时

package com.java3d.java3d.graphics;

 import java.awt.Color;
 import java.awt.image.BufferedImage;
 import java.io.File;

 import javax.imageio.ImageIO;

 public class Texture {
public static Render floor = loadBitMap("smile.png");
 public Texture(){}
public static Render loadBitMap(String fileName) {
    try {
        BufferedImage image =          ImageIO.read(Thread.currentThread().getContextClassLoader().getResource(fileName));
        System.out.print(image==null);
        int width = image.getWidth();
        System.out.println(width);
        int height = image.getHeight();
        System.out.println(height);


        System.out.println(image.getRGB(4, 4));
        Render result = new Render(width, height);

        image.getRGB(0, 0, width, height, result.pixels, 0, width);

        return result;
    } catch (Exception e) {
 System.out.println("CRASH!");
 throw new RuntimeException(e);
    }
}
 }

它返回每个像素为-1；是什么引起了这个问题？
这是图片：

最佳答案

import java.awt.image.BufferedImage;
import java.net.URL;
import javax.imageio.ImageIO;

public class QuickTest {

    public static void main( String[] args ) throws Exception {
        BufferedImage image = ImageIO.read(new URL(
            "http://i.stack.imgur.com/BLRBU.png"));
        System.out.println(image==null);
        int width = image.getWidth();
        int height = image.getHeight();
        System.out.println(width + "x" + height);
        for (int i=0; i<width; i++) {
            for (int j=0; j<height; j++) {
                System.out.print(image.getRGB(i, j) + "," );
            }
            System.out.println();
        }
    }
}

OP

false
8x8
-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,
-16711936,-1,-1,-1,-1,-1,-1,-16711936,
-16711936,-1,-65536,-1,-65536,-1,-1,-16711936,
-16711936,-1,-1,-1,-1,-65536,-1,-16711936,
-16711936,-1,-1,-1,-1,-65536,-1,-16711936,
-16711936,-1,-65536,-1,-65536,-1,-1,-16711936,
-16711936,-1,-1,-1,-1,-1,-1,-16711936,
-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,-16711936,

关于java - 读取图像时出错，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13540690/