package pushbackInputStream;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;

/*
 * 自己再寫一次
 */
public class PushbackInputStreamDemo2 {
    public static void main(String[] args) throws Exception {
        //定義一個字符串
        String str = "hello.hai.heihei.laiba...";
        
 
//定義一個內存輸入流對象
        ByteArrayInputStream bai = new ByteArrayInputStream(str.getBytes());
        //定義一個回退流對象
        PushbackInputStream pbi = new PushbackInputStream(bai);
        System.out.println("讀取的數據為：");
        int temp = 0;
        while ((temp = pbi.read())!=-1) {
          if (temp ==‘.‘) {
            pbi.unread(temp);
             temp 
 
= pbi.read();
             System.out.print("(回退"+(char)temp+")");
        }
          else {
              System.out.print((char)temp);
        }
            
        }
        
    }

}

回退流 Demo2