java中imageIO的使用

package imageio;

import javax.imageio.*;//for ImageIO.read
import java.awt.image.BufferedImage;
import java.awt.*;//for JFrame and JLabel etc
import javax.swing.*;//for JFrame and JLabel etc
import java.net.*;//for URL
import java.io.*;//for catch (IOException e),File,InputStream, BufferedInputStream,and FileInputStream ect

public class Example {
   public static void main (String[] args){
       String dir = System.getProperty("user.dir");//获得当前路径
       System.out.println(dir);
      
       File f = new File(".");//获得当前文件路径
       String absolutePath = f.getAbsolutePath();
       System.out.println(absolutePath);

   Image image = null;
    try {
        // Read from a file
        File sourceimage = new File(".\\pic\\over.gif"); //source.gif图片要与HelloJava.java同在一目录下
        image = ImageIO.read(sourceimage);
   
        // Read from an input stream
        //InputStream is = new BufferedInputStream(
       //    new FileInputStream(".\\pic\\over.gif")); //mid.jpg图片要与HelloJava.java同在一目录下
       // image = ImageIO.read(is);
   
        // Read from a URL
        //URL url = new URL("http://www.javaworld.com/images/012407-tipsbox.jpg");
       // image = ImageIO.read(url);
    } catch (IOException e) {
    }
   
    // Use a label to display the image
    JFrame frame = new JFrame();
    JLabel label = new JLabel(new ImageIcon(image));
    frame.getContentPane().add(label, BorderLayout.CENTER);
    frame.pack();
    frame.setVisible(true);
    //关闭窗口--退出调试
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
}

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