二進位制檔案讀取圖片，其實就是用位元組流讀取圖片。其實就是用Java中提供的對位元組流操作的類去操控圖片檔案

import java.io.*;
import javax.swing.*;
public class Start
{
	public static void main(String args[]) throws Exception{
		
		//原始檔，必須存在，路徑可選
		File sf = new File("H:/javapro/files/source.jpg");	
		
		//目的檔案，因為要向其中寫入，指定檔案可以不存在，由程式生成
		File df = new File("H:/javapro/files/dest.jpg");
		new ReadWriteGra(sf,df);
		new UseGra(df);
	}
}

class ReadWriteGra 
{
	FileInputStream in = null;
	FileOutputStream out = null;
	public ReadWriteGra(File sourceFile,File destFile) throws Exception{
		byte[] buf = new byte[1024];
		int len = 0;
		in = new FileInputStream(sourceFile);
		out = new FileOutputStream(destFile,true);
		while( (len = in.read(buf)) != -1 ){
			out.write(buf,0,len);
		}
		out.close();
	}
}
class UseGra extends JFrame
{
	public UseGra(File picFile) throws Exception{

		this.setVisible(true);
		this.setResizable(false);
		this.setLayout(null);
		this.setBounds(600, 200, 400, 370);
		this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		JPanel p1 = (JPanel)this.getContentPane();
		p1.setOpaque(false);
		p1.setLayout(null);
		InputStream is = new FileInputStream(picFile);
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		int b = 0;
		while((b = is.read())!=-1){
			baos.write(b);
		}
		ImageIcon image = new ImageIcon(baos.toByteArray());
		JLabel background = new JLabel(image);
		this.getLayeredPane().add(background, new Integer(Integer.MIN_VALUE));
		background.setBounds(0, 0, image.getIconWidth(), image.getIconHeight());
		JButton bt = new JButton("Test_Button");
		p1.add(bt);
		bt.setBounds(10,10,150,25);
		validate();
	}
}