Java Java.io.CharArrayWriter.reset()用法及代码示例

描述

这个java.io.CharArrayWriter.reset()方法重置缓冲区，以便它可以再次使用而不会丢弃分配的缓冲区。

声明

以下是声明java.io.CharArrayWriter.reset()方法≫

public void reset()

参数

NA

返回值

该方法不返回任何值。

异常

NA

示例

下面的例子展示了 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