Java.io.FileInputStream.close() 方法

package com.codingdict;



import java.io.IOException;

import java.io.FileInputStream;



public class FileInputStreamDemo {



   public static void main(String[] args) throws IOException {

      FileInputStream fis = null;

      int i = 0;

      char c;



      try {



         // create new file input stream

         fis = new FileInputStream("C://test.txt");



         // read byte from file input stream

         i = fis.read();



         // convert integer from character

         c = (char)i;



         // print character

         System.out.println(c);



         // close file input stream

         fis.close();

         System.out.println("Close() invoked");



         // tries to read byte from close file input stream

         i = fis.read();

         c = (char)i;

         System.out.println(c);



      } catch(Exception ex) {



         // if an I/O error occurs

         System.out.println("IOException: close called before read()");

      } finally {



         // releases all system resources from the streams

         if(fis!=null) {

            fis.close();

         }

      }

   }

}