Java Java.io.OutputStreamWriter.close() 方法

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  描述

  java.io.OutputStreamWriter.close()方法关闭流，首先刷新它。一旦关闭流，进一步的write()或flush()调用将导致引发IOException。关闭先前关闭的流无效。
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  声明

  以下是java.io.OutputStreamWriter.close()方法的声明。

   public void close()

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  参数

  不适用
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  返回值

  此方法不返回值。
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  异常

  IOException如果发生I / O错误。
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  例子

  以下示例显示java.io.OutputStreamWriter.close()方法的用法。

   
  package com.jc2182;
  import java.io.*;
  
  public class OutputStreamWriterDemo {
     public static void main(String[] args) {
        try {
           // create a new OutputStreamWriter
           OutputStream os = new FileOutputStream("test.txt");
           OutputStreamWriter writer = new OutputStreamWriter(os);
  
           // create a new FileInputStream to read what we write
           FileInputStream in = new FileInputStream("test.txt");
  
           // write something in the file
           writer.write(70);
  
           // flush the stream
           writer.flush();
  
           // read what we write
           System.out.println("" + (char) in.read());
  
           // close the stream
           System.out.println("Closing Stream...");
           writer.close();
           System.out.println("Stream closed.");
        } catch (Exception ex) {
           ex.printStackTrace();
        }
     }
  }
  

  让我们编译并运行以上程序，这将产生以下结果-

   
  F 
  Closing Stream... 
  Stream closed.