exercise16_2.java

一款用java编写的小型数据库管理系统

import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

import javax.swing.JOptionPane;
public class Exercise16_2 {
   public static void main(String[]a)throws IOException{
	   PrintWriter output = new PrintWriter(a[1]);
	   output.print("John T Smith ");
	    output.println(90);
	    output.print("Eric K Jones ");
	    output.println(85);
	    output.close();
       int code;
       String string="";
       String s1="";
       String s=a[0];
	   FileReader input=new FileReader(a[1]);
	   while((code=input.read())!=-1){
		     string+=(char)code;
		      if((char)code==32||(char)code==13){
				  if(!string.trim().equals(s))
				    s1+=string;
				    string="";
				}

      		  }
      		  System.out.println();
      		  PrintWriter output1=new PrintWriter(a[1]);
      		  output1.print(s1);
      		  output1.close();
		  }
 	  }