Java PushbackInputStream reset()方法

java.io.PushbackInputStream.reset() 方法重新定位此流，mark方法最后调用这个输入流中的位置，但对于类PushbackInputStream什么都不做，除了抛出IOException。

1 语法

public void reset()

2 参数

无

3 返回值

无

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.io.PushbackInputStream.reset()方法的例子
 */
import java.io.*;

public class Demo {
    public static void main(String[] args) {

        // declare a buffer and initialize its size:
        byte[] arrByte = new byte[1024];

        // create an array for our message
        byte[] byteArray = new byte[]{'H', 'e', 'l', 'l', 'o'};


        // create object of PushbackInputStream class for specified stream
        InputStream is = new ByteArrayInputStream(byteArray);
        PushbackInputStream pis = new PushbackInputStream(is);

        try {
            // read from the buffer one character at a time
            for (int i = 0; i < byteArray.length; i++) {

                // read a char into our array
                arrByte[i] = (byte) pis.read();

                // display the read byte
                System.out.print((char) arrByte[i]);
            }

            // try to call the reset method, but it is not supported
            pis.reset();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

输出结果为：

Hellojava.io.IOException: mark/reset not supported
	at java.io.PushbackInputStream.reset(PushbackInputStream.java:364)
	at com.yiidian.Demo.main(Demo.java:37)