Java IO学习笔记：字符流

import java.io.*; 

/** 
* 字符流测试 
* 
* @author leizhimin 2008-8-27 22:16:44 
*/ 
public  class TestIOStream { 
     public  static  void main(String[] args) { 
        testReaderWriter(); 
        testLineNumberReader(); 
    } 

     /** 
     * 带缓冲的字符流 
     */ 
     public  static  void testReaderWriter() { 
         int bufsize = 25; 
         try { 
            BufferedReader bufferedReader =  new BufferedReader( new FileReader( new File( "C:\\x.txt"))); 
            BufferedWriter bufferedWriter =  new BufferedWriter( new FileWriter( new File( "C:\\xb.txt"))); 

             char buf[] =  new  char[bufsize];      //字符缓冲区 
             while (bufferedReader.read(buf) != -1) { 
                bufferedWriter.write(buf); 
            } 
            bufferedWriter.flush(); 
            bufferedReader.close(); 
            bufferedWriter.close(); 

        }  catch (FileNotFoundException e) { 
            e.printStackTrace(); 
        }  catch (IOException e) { 
            e.printStackTrace(); 
        } 
    } 

     /** 
     * 按行读取的字符流 
     */ 
     public  static  void testLineNumberReader() { 
         try { 
            LineNumberReader lineNumberReader =  new LineNumberReader( new BufferedReader( new FileReader( new File( "C:\\x.txt")))); 

            String lineString;       //行字符串变量 
             int x = 0;               //行号 
             while ((lineString = lineNumberReader.readLine()) !=  null) { 
                x++; 
                System.out.println( "行号：" + x +  " >>>" + lineString); 
            } 
            lineNumberReader.close(); 
        }  catch (FileNotFoundException e) { 
            e.printStackTrace(); 
        }  catch (IOException e) { 
            e.printStackTrace(); 
        } 
    } 
}

行号：1 >>>白日依山尽，黄河入海流。  
行号：2 >>>欲穷千里目，更上一层楼。 
行号：3 >>> 
行号：4 >>>—— 王之涣《登鹳雀楼》 

Process finished with exit code 0