Java CharArrayWriter reset()方法

java.io.CharArrayWriter.reset() 用于重置缓冲区。

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

public class Demo {
    public static void main(String[] args) {
        CharArrayWriter chw = null;

        try {
            // create character array writer
            chw = new CharArrayWriter();

            // declare character sequence
            CharSequence csq = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

            // append character sequence to the writer
            chw.append(csq);

            System.out.println("Before Reset:");

            // print  character sequence
            System.out.println(csq);

            // invoke reset()
            chw.reset();
            System.out.println("Reset is invoked");

            csq = "1234567890";

            chw.append(csq);

            System.out.println("After reset:");

            // print character sequence
            System.out.println(chw.toString());

        } catch(Exception e) {
            // for any error
            e.printStackTrace();
        } finally {
            // releases all system resources from writer
            if(chw!=null)
                chw.close();
        }
    }
}

输出结果为：

Number = 15
Number = 20
Number = 25