Re: [問題] 讀取的資料比對

[ClareQ (人比人Cheese人)]

※ 引述《blackpastor (blackpastor)》之銘言：
幫你改成效率好點的，
沒compile過希望沒打錯XD

import java.io.*;
import java.util.*;
import javax.swing.*;

public class CheckDoubleNumber {
  public static void main(String[] args) {
    Collection set=new LinkedHashSet();
    Scanner s=null;
    try {
      File source=new File("Number.txt");
      for(s=new Scanner(source);s.hasNext();){
        String text=String.valueOf(s.next()).trim();
        if(set.contains(text)){
          JOptionPane.showMessageDialog(null,text+" existed");
        }else set.add(text);
      }//for
    }catch(Exception ignored){
    }finally{
      if(null!=s)s.close();
    }//try
  }//main
}

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