源程序Bwriter.java,从键盘输入一系列字符串，写入到某磁盘文件中

import java. io.*;  public class Bwriter    {     public static void main(String args[]) throws Exception    {     InputStreamReader i=new InputStreamReader(System.in);     BufferedReader b=new BufferedReader(i);     FileWriter f=new FileWriter("file1.txt");     BufferedWriter w=new BufferedWriter(f);        String s;        while(true)           {             System.out.print("input a string:");             System.out.flush();                s=b.readLine();                if(s.length()==0)                break;                w.write(s);                w.newLine();                  }                w.close( );                 }         } 

【程序分析】

  如果用户输入的内容如下图表示，则file1.txt文件中的内容如图显示