prefference.java

别人的代码

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.*;
public class Prefference extends JDialog{
  JPanel up,center,down,over;
  JLabel antnum,defaultDirect;
  JTextField directText;
  JComboBox numBox;
  JButton ok,cancel;
  JScrollPane sp;
  Container contentPane;
  Listener listener;
  
  public Prefference(JFrame f){
    super(f,"Prefference...");
    init();
  }

  public void init(){
    String[] items={"1","2","3","4","5","6","7","8"}; 
    listener=new Listener();
    contentPane=getContentPane();
    up=new JPanel();
    over=new JPanel();
    center=new JPanel();
    down=new JPanel();
    antnum=new JLabel("Ants Num:");
    defaultDirect=new JLabel("Default Directory:");
    directText=new JTextField(20);
    directText.setText("c:\\download");
    numBox=new JComboBox(items);
   // numBox.setVisibleRowCount(1);
    numBox.setSelectedIndex(4);
    sp=new JScrollPane(numBox);
    ok=new JButton("OK");
    ok.addActionListener(listener);
    cancel=new JButton("Cancel");
    cancel.addActionListener(listener);
    over.setLayout(new FlowLayout(1));
    up.setLayout(new FlowLayout(2));
    up.add(defaultDirect);
    up.add(directText);
    center.setLayout(new FlowLayout(2));
    center.add(antnum);
    center.add(sp);
    //down.setLayout(new FlowLayout(2));
    down.add(ok);
    down.add(cancel);
    over.add(up);
    over.add(center);
    //over.add(down,BorderLayout.SOUTH);
    contentPane.add(over,BorderLayout.CENTER);
    contentPane.add(down,BorderLayout.SOUTH);
  }
  class Listener implements ActionListener{
    public void actionPerformed(ActionEvent e){
      String command=e.getActionCommand();
      if(command=="OK"){
        Utility.antNum=Integer.parseInt(numBox.getSelectedItem().toString());
        Utility.defaultDirectory=directText.getText();
        System.out.println(Utility.antNum);
        System.out.println(Utility.defaultDirectory);
        dispose();
      }
      else if(command=="Cancel"){
         dispose();
      }
    }
  }
  public void center(){
		Dimension screenSize,size;
		screenSize=Toolkit.getDefaultToolkit().getScreenSize();
		size=this.getSize();
		if(size.height > screenSize.height){
           size.height=screenSize.height;
        }
        if(size.width >screenSize.width){
           size.width=screenSize.width;
        }
        this.setLocation((screenSize.width - size.width)/2,(screenSize.height - size.height)/2);
    }
}