Java Java.io.OutputStreamWriter.flush() 方法

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  描述

  java.io.OutputStreamWriter.flush()方法刷新流。
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  声明

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

   public void flush()

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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.flush()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
           System.out.println("Flushing Stream...");
           writer.flush();
           System.out.println("Stream flushed.");
  
           // read what we write
           System.out.println("" + (char) in.read());
  
        } 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-

   
  Flushing Stream...
  Stream flushed.
  F