Java.io.FilterReader.close() 方法

package com.codingdict;



import java.io.FilterReader;

import java.io.IOException;

import java.io.Reader;

import java.io.StringReader;



public class FilterReaderDemo {



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

      FilterReader fr = null;

      Reader r = null;

      int i = 0;

      char c;



      try {



         // create new reader

         r = new StringReader("ABCDEFG");



         // create new filter reader

         fr = new FilterReader(r) {

         };



         // read till the end of the stream

         while((i = fr.read())!=-1) {

            c = (char)i;

            System.out.println(c);

         }



      } catch(IOException e) {



         // if any I/O error occurs

         e.printStackTrace();

      } finally {



         // releases system resources

         if(r!=null)

            r.close();

         if(fr!=null) {

            fr.close();

            System.out.print("Stream is closed");

            System.out.print(" system resources released");

         }

      }

   }

}