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


public class Week extends JApplet  implements ActionListener
{
	JPanel p;
	JLabel lblYear,lblMonth,lblDay,lblInfo;
	JComboBox cbxYear,cbxMonth,cbxDay;
	JButton btn;
	Calendar m_date;
	public void init()
	{
		p=new JPanel();
		
		m_date=Calendar.getInstance();
		
		lblYear=new JLabel("年");
		cbxYear=new JComboBox();
		for(int i=1990;i<=2050;i++)
			cbxYear.addItem(new Integer(i));
		cbxYear.setSelectedItem(new Integer(m_date.get(Calendar.YEAR)));
		p.add(cbxYear);
		p.add(lblYear);
		
		lblMonth=new JLabel("月");
		cbxMonth=new JComboBox();
		for(int i=1;i<=12;i++)
			cbxMonth.addItem(new Integer(i));
		cbxMonth.setSelectedItem(new Integer(m_date.get(Calendar.MONTH)+1));
		p.add(cbxMonth);
		p.add(lblMonth);
		
		lblDay=new JLabel("日");
		cbxDay=new JComboBox();
		for(int i=1;i<=31;i++)
			cbxDay.addItem(new Integer(i));
		cbxDay.setSelectedItem(new Integer(m_date.get(Calendar.DAY_OF_MONTH)));
		p.add(cbxDay);
		p.add(lblDay);
		
		lblInfo=new JLabel("sadf",JLabel.CENTER);
		
		btn=new JButton("計算星期");
		p.add(btn);
		this.getContentPane().add(p,BorderLayout.NORTH);
		this.getContentPane().add(lblInfo);
		btn.addActionListener(this);
		
	}	
	public void actionPerformed(ActionEvent e)
	{
		Calendar  dd=Calendar.getInstance();
		int y,m,d,w;
		String week="";
		y=Integer.parseInt(cbxYear.getSelectedItem().toString());
		m=Integer.parseInt(cbxMonth.getSelectedItem().toString());
		d=Integer.parseInt(cbxDay.getSelectedItem().toString());
		
		dd.set(Calendar.YEAR,y);
		dd.set(Calendar.MONTH,m-1);
		dd.set(Calendar.DAY_OF_MONTH,d);
		
		y=dd.get(Calendar.YEAR);
		m=dd.get(Calendar.MONTH)+1;
		d=dd.get(Calendar.DAY_OF_MONTH);
		
		cbxYear.setSelectedItem(new Integer(y));
		cbxMonth.setSelectedItem(new Integer(m));
		cbxDay.setSelectedItem(new Integer(d));
		
		w=dd.get(Calendar.DAY_OF_WEEK);
		switch(w)
		{
			case 1:week="日";break;
			case 2:week="1";break;
			case 3:week="2";break;
			case 4:week="3";break;
			case 5:week="4";break;
			case 6:week="5";break;
			case 7:week="6";break;
		}
		
		lblInfo.setText(y+"年"+m+"月"+d+"日是星期"+week);
	}
		
}