swiminfo.java

源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例子程序

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;

public class SwimInfo extends JxFrame
   implements ActionListener
{
   SwimData sdata, sxdata = null;
   JawtList swList, cloneList;
   JButton Clone, Ages, Sex, Quit;
   Swimmer sw;
   boolean female= false;

   public SwimInfo()
   {
    super("Prototype example");
    sdata = new TimeSwimData("swimmers.txt");
   
    setGUI();
    loadswList(sdata, swList);
   }
   //-----------------------------------
   public void actionPerformed(ActionEvent e)
   {
      Object obj = e.getSource();
      if(obj == Clone)
         cloneAndLoad();
      if(obj == Sex)
         loadSexList(sdata);
      if(obj == Ages)    {
         if(sxdata == null)
            loadAgeList(sdata);
         else
            loadAgeList(sxdata);
      }

      if(obj == Quit)
         System.exit(0);
   }
   //-----------------------------------
   private void cloneAndLoad()
   {
    sxdata = (SwimData)sdata.deepClone();
    //sxdata = (SwimData)sdata.clone();
    sxdata.sort();
    
    cloneList.removeAll();
    //now print out sorted values from clone
    loadswList(sxdata, cloneList);
   }
   //-----------------------------------
    private void loadSexList(SwimData sw) {
       sxdata = new SexSwimData(sw);
       female = ! female;
       sxdata.setFemale (female);

       sxdata.sort ();
       loadswList(sxdata, cloneList);
    }
    //-----------------------------------
    private void loadAgeList(SwimData sw) {
       AgeSwimData asd = new AgeSwimData(sw);
       asd.sort ();
       loadswList(asd, cloneList);
    }
   //-----------------------------------
   private void loadswList(SwimData sdata, JawtList ls)
   {
      String sw;
      ls.removeAll();
      
      for(int i=0; i< sdata.size(); i++)
      {
       sw = sdata.getName(i);
       ls.add(sw);
      }
   }
   //-----------------------------------

   private void setGUI()
   {
      setBackground(Color.lightGray);
      swList = new JawtList(15);
      cloneList = new JawtList(15);
      Box cp = new Box(BoxLayout.Y_AXIS);
      JPanel jp = new JPanel();
      getContentPane().add(jp);
      jp.setLayout(new GridLayout(1,3));
      jp.add(swList);
      JPanel pc = new JPanel();
      pc.setAlignmentX (1.0f);
      pc.add(cp);
      jp.add(pc);
      jp.add(cloneList);
      Clone = new JButton("Sort");
      Ages = new JButton("Ages");
      Sex = new JButton("Sex");
      Quit = new JButton("Quit");
                 
      
      cp.add(Clone);
      cp.add(Box.createVerticalStrut(15));
      cp.add(Sex);
      cp.add(Box.createVerticalStrut(15));
      cp.add(Ages);
      cp.add(Box.createVerticalStrut(15));
      cp.add(Quit);
      Dimension d = Ages.getPreferredSize ();
      Clone.setMinimumSize (d);
      Sex.setMinimumSize (d);
      Quit.setMinimumSize (d) ;
      
      Clone.addActionListener(this);
      Sex.addActionListener(this);
      Ages.addActionListener (this);
      Quit.addActionListener(this);
      
      setBounds( 100,100,500,400);
      setVisible(true);
   }
   //-----------------------------------
   static public void main(String argv[])
   {
      new SwimInfo();
   }
}