Java.io.FilterReader.read char len() 方法

package com.codingdict;



import java.io.FilterReader;

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;

      char[] cbuf = new char[6];

      int i = 0;



      try {



         // create new reader

         r = new StringReader("ABCDEF");



         // create new filter reader

         fr = new FilterReader(r) {

         };



         // read data of len 4, to the buffer

         i = fr.read(cbuf, 2, 4);

         System.out.println("No. of characters read: "+i);



         // read till the end of the char buffer

         for(char c:cbuf) {



            // checks for the empty character in buffer

            if((byte)c == 0)

               c = '-';



            // prints

            System.out.print(c);

         }



      } catch(Exception e) {



         // if any I/O error occurs

         e.printStackTrace();

      } finally {



         // releases system resources associated with this stream

         if(r!=null)

            r.close();

         if(fr!=null)

            fr.close();

      }

   }

}