void reset

描述

所述java.io.CharArrayWriter.reset（）方法将重置缓冲器，以便它可以被再次使用，而不丢弃分配的缓冲区。

声明

以下是java.io.CharArrayWriter.reset（）方法的声明

public void reset()

参数

NA

返回值

该方法不返回任何值。

异常

NA

实例

以下示例显示了java.io.CharArrayWriter.reset（）方法的用法。

package com.tutorialspoint;

  import java.io.CharArrayWriter;

  public class CharArrayWriterDemo {
     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();
        }
     }
  }

让我们编译并运行上面的程序，这将产生以下结果

Before Reset:
  ABCDEFGHIJKLMNOPQRSTUVWXYZ
  Reset is invoked
  After reset:
  1234567890