iodemo2.java

JAVA的一些基础教程

import java.io.*;
public class IODemo2
	{
	public static void printArray(byte bytes[] ,int num)
	{
		System.out.println("读了"+ num + "个字节，数组中的数据");
		for(int i=0; i< bytes.length; i++)
		{
			System.out.print(Integer.toHexString(bytes[i])+ " ");
		}
		System.out.println();
		for(int i=0; i< num; i++)
		{
			System.out.write(bytes[i]);
		}
	}	

	public static void main(String[] args) throws Exception
	{
		InputStream in = System.in;
		byte bytes[] = new byte[5];
		int num = System.in.read(bytes);
		printArray(bytes,num);
		num = in.read(bytes,2,2);
		printArray(bytes,num);

		num = in.read(bytes,2,10);
		printArray(bytes,num);
				
	}
}