iodemo2.java

JAVA输入输出流的简单介绍

 import java.util.*;
import java.io.*;
class IODemo2 
{
	public static void main(String[] args) 
	{
		 String s ;
		 try{
            PrintWriter out=new PrintWriter(
                      new FileWriter("test.txt"));
			//PrintWriter out=new PrintWriter(
                      //new OutputStreamWriter(new FileOutputStream("test.txt")));
			//out.println(234+"|"+5768+"|"+345.7+"|"+89);
			//out.println(234+"|"+5768+"|"+345.7+"|"+89);
			out.println(234+"|"+5768+"|"+345.7+"|"+89);
			out.println(234+" "+5768+" "+345.7+" "+89);
			//out.println(234+" "+5768+" "+345.7+" "+89);
			//out.println(234+" "+5768+" "+345.7+" "+89);
			out.close();
			BufferedReader in=new BufferedReader(
                      new FileReader("test.txt"));
			  
            //out.println("the following is from source");
            while((s=in.readLine())!=null){
                StringTokenizer token = new StringTokenizer(s," ");
				System.out.println("111");
				while(token.hasMoreTokens())
				{
                     System.out.print(Double.parseDouble(token.nextToken())+"|");
				}
				System.out.println();
			}
                //out.println(s);
                //}
            in.close();
            //out.close();
            }
			catch (Exception e){}
	    }
}