Java.io.BufferedWriter.flush() 方法

package com.codingdict;



import java.io.BufferedWriter;

import java.io.IOException;

import java.io.StringWriter;



public class BufferedWriterDemo {



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

      StringWriter sw = null;

      BufferedWriter bw = null;

      String letters = "ABCDEFGHIJK";



      try {



         // create string writer

         sw = new StringWriter();



         //create buffered writer

         bw = new BufferedWriter(sw);



         // for each character in the string

         for (char c: letters.toCharArray()) {



            // append character to the writer

            bw.append(c);



            // flush the characters to the intended stream

            bw.flush();



            // print string buffer from string writer

            System.out.println(sw.getBuffer());

         }

      } catch(IOException e) {



         // if I/O error occurs

         e.printStackTrace();

      } finally {



         // releases any system resources associated with the stream

         if(sw!=null)

            sw.close();

         if(bw!=null)

            bw.close();

      }

   }

}