Java Java.io.OutputStreamWriter.close() 方法

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。

声明

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

 public void close()

参数

不适用

返回值

此方法不返回值。

异常

IOException如果发生I / O错误。

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.