12.14 回退流

表 12-23 PushbacklnputStream 类的常用方法

表12-24回退流与输入流的对应

【例12.67】操作回退流

package jiaqi;

import java.io.ByteArrayInputStream;
import java.io.PushbackInputStream;

public class demo436_1 {

//	private static final PushbackInputStream ByteArrayInputStream = null;

	public static void main(String[] args)throws Exception 
	{
		String str = "www.mycomputer.top";
		
		//回退流
		PushbackInputStream push = null;
		//内存字节输入流
		ByteArrayInputStream bai = null;
		
		//实例化
	    bai = new ByteArrayInputStream(str.getBytes());
		//实例化
	    push = new PushbackInputStream(bai);
	    
	    
	    int temp = 0;
	    while((temp = push.read())!=-1)
	    {
	    	if((char)temp == '.')
	    	{
	    		push.unread(temp);//回退
	    		temp = push.read();//读出
	    		System.out.print("(删除.)");
	    	}
	    	else 
	    	{
	    		System.out.print((char)temp);
	    	}
	    }
	    
	}

}