record.java

《Java课程设计》第二版

import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Record extends JDialog implements ActionListener{
   int time=0;
   String grade=null;
   String key=null;
   String message=null;
   JTextField textName; 
   JLabel label=null; 
   JButton 确定,取消;
   public Record(){
      setTitle("记录你的成绩");
      this.time=time; 
      this.grade=grade;
      setBounds(100,100,240,160);
      setResizable(false);
      setModal(true); 
      确定=new JButton("确定");
      取消=new JButton("取消");
      textName=new JTextField(8);
      textName.setText("匿名");
      确定.addActionListener(this);
      取消.addActionListener(this);
      setLayout(new GridLayout(2,1));
      label=new JLabel("您现在是...高手,输入您的大名上榜");
      add(label);
      JPanel p=new JPanel();
      p.add(textName);
      p.add(确定);
      p.add(取消);
      add(p);
      setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
  }
  public void setGrade(String grade){
      this.grade=grade;
      label.setText("您现在是"+grade+"高手,输入您的大名上榜");
  }
  public void setTime(int time){
      this.time=time;
  }
  public void actionPerformed(ActionEvent e){
     if(e.getSource()==确定){
         message=grade+"#"+time+"#"+" "+textName.getText();
         key=grade;
         writeRecord(key,message);
         setVisible(false);
     }
     if(e.getSource()==取消){
         setVisible(false);
     }  
  }
  public void  writeRecord(String key,String message){
     File f=new File("英雄榜.txt");
     try{ FileInputStream in=new FileInputStream(f);
          ObjectInputStream object_in=new ObjectInputStream(in);
          Hashtable hashtable=(Hashtable)object_in.readObject();
          object_in.close();
          in.close(); 
          String temp=(String)hashtable.get(key);
          StringTokenizer fenxi=new StringTokenizer(temp,"#");
          fenxi.nextToken();
          int n=Integer.parseInt(fenxi.nextToken());
          if(time<n){ 
                hashtable.put(key,message);
                FileOutputStream out=new FileOutputStream(f);
                ObjectOutputStream object_out=new ObjectOutputStream(out);
                object_out.writeObject(hashtable);
                object_out.close();
                out.close();
          }
     }
     catch(Exception e) {
         System.out.println(e);
     }
   }
}