void close


描述

所述java.io.FilterInputStream.close()方法关闭此输入流并释放与该流相关的所有系统资源。

声明

以下是public void close()方法的声明

public void close()

参数

NA

返回值

该方法不返回任何值。

异常

IOException - 如果发生I / O错误。

实例

以下示例显示了public void close()方法的用法。

package com.tutorialspoint;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

public class FilterInputStreamDemo {
   public static void main(String[] args) throws Exception {
      InputStream is = null;
      FilterInputStream fis = null;

      try {
         // create input streams
         is = new FileInputStream("C://test.txt");
         fis = new BufferedInputStream(is);

         // closes and releases the associated system resources
         fis.close();

         // read is called after close() invocation
         fis.read();

      } catch(IOException e) {

         System.out.print("stream is closed prior ot this call");
      } finally {
         // releases any system resources associated with the stream
         if(is!=null)
            is.close();
         if(fis!=null)
            fis.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

ABCDEF

让我们编译并运行上面的程序,这将产生以下结果

stream is closed prior ot this call