Java StringReader reset()方法

java.io.StringReader.reset() 方法重置流为最新的标记，或以该字符串的开头，如果它从来没有被标记。

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.StringReader.reset()方法的例子
 */
import java.io.*;

public class Demo {
    public static void main(String[] args) {
        String s = "Hello World";

        // create a new StringReader
        StringReader sr = new StringReader(s);

        try {
            // read the first five chars
            for (int i = 0; i < 5; i++) {
                char c = (char) sr.read();
                System.out.print("" + c);
            }

            // mark the reader at position 5 for maximum 6
            sr.mark(6);

            // read the next six chars
            for (int i = 0; i < 6; i++) {
                char c = (char) sr.read();
                System.out.print("" + c);
            }

            // reset back to marked position
            sr.reset();

            // read again the next six chars
            for (int i = 0; i < 6; i++) {
                char c = (char) sr.read();
                System.out.print("" + c);
            }

            // close the stream
            sr.close();

        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

输出结果为：

Hello World World