bytearraydemo.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter13;
import java.io.*;
public class ByteArrayDemo
{
	public static void main(String args[]) 
	{
		int Bchar;
		byte Array2[];
		String str="Read Bytes from a ByteArrayInputStream";
		//将str转换成字节形式，存入数组Array1
  		byte Array1[]=str.getBytes();  
  		//创建ByteArrayInputStream类对象
		ByteArrayInputStream byteIn=new ByteArrayInputStream(Array1,0,10);
		ByteArrayOutputStream byteOut=new ByteArrayOutputStream();
  		System.out.println("从输入流中读取的字符数："+byteIn.available());
  		System.out.println("读取的内容为:");
		//读取byteIn中的每个字节
		while((Bchar=byteIn.read())!=-1)
		{
			System.out.println((char)Bchar);
			byteOut.write(Bchar);
		}
		Array2 = byteOut.toByteArray();   
      	System.out.println("Array2的内容: " + new String(Array2));
      	System.out.print("直接由ByteArray输出Array2: ");
      	try
      	{
      		byteOut.writeTo(System.out);  //输出至屏幕
      		System.out.println();
      	}
      	catch(Exception e)
      	{
      		e.printStackTrace();
      	}
  	}
}