void close


描述

所述java.io.BufferedInputStream.Close()方法关闭该流并释放与它相关联的所有系统资源。关闭流后,read(),ready(),mark(),reset()或skip()调用将抛出IOException。

声明

Following is the declaration for java.io.BufferedReader.close() method.

public void close()

参数

NA

返回值

该方法没有返回值

异常

IOException − 如果发生I / O错误。

实例

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

package com.tutorialspoint;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class BufferedReaderDemo {
   public static void main(String[] args) throws Exception {
      InputStream is = null;
      InputStreamReader isr = null;
      BufferedReader br = null;

      try {
         // open input stream test.txt for reading purpose.
         is = new FileInputStream("c:/test.txt");

         // create new input stream reader
         isr = new InputStreamReader(is);

         // create new buffered reader
         br = new BufferedReader(isr);

         // releases any system resources associated with reader
         br.close();

         // creates error
         br.read();

      } catch(IOException e) {
         // IO error
         System.out.println("The buffered reader is closed");
      } finally {
         // releases any system resources associated
         if(is!=null)
            is.close();
         if(isr!=null)
            isr.close();
         if(br!=null)
            br.close();
      }
   }
}

假设我们有一个文本文件c:/test.txt,它具有以下内容。此文件将用作示例程序的输入

ABCDEFGHIJKLMNOPQRSTUVWXYZ

让我们编译并运行上面的程序,这将产生以下结果

IOException: The buffered reader is closed