求现成swing做的日期选择框 (200分)

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class JDatePanel extends JPanel implements ActionListener {
	protected int curYear;
	protected int curMonth;
	protected int curDate;
	final Font font14 = new Font("Monospaced", 0, 14);
	final Font font12 = new Font("Monospaced", 0, 12);
	JLabel lblYear;
	JLabel lblMonth;
	JLabel lblSun;
	JLabel lblMon;
	JLabel lblTues;
	JLabel lblWed;
	JLabel lblThurs;
	JLabel lblFri;
	JLabel lblSat;
	JButton btDay[] = new JButton[43];
	JButton btYearL;
	JButton btYearR;
	JButton btMonthL;
	JButton btMonthR;
	JTextField txtYear;
	JTextField txtMonth;
	Container ob;
	Container parent;
	public JDatePanel(Container parent, Container ob) {
		this.parent = parent;
		this.ob = ob;
		init();
	}
	
	public void setContainer(Container ob){
		this.ob = ob;
	}
	private void init() {
		setFont(font14);
		lblSun = new JLabel("  日");
		lblMon = new JLabel("  一");
		lblTues = new JLabel("  二");
		lblWed = new JLabel("  三");
		lblThurs = new JLabel("  四");
		lblFri = new JLabel("  五");
		lblSat = new JLabel("  六");
		//		btDay = new JButton[32];
		btYearL = new JButton("<<");
		btYearR = new JButton(">>");
		btMonthL = new JButton("<");
		btMonthR = new JButton(">");
		txtYear = new JTextField("年");
		txtMonth = new JTextField("月");
		for (int i = 1;
i < btDay.length;
i++) {
			btDay[i] = new JButton(String.valueOf(i));
			btDay[i].setActionCommand("day");
			btDay[i].addActionListener(this);
		}
		btYearL.addActionListener(this);
		btYearR.addActionListener(this);
		btMonthL.addActionListener(this);
		btMonthR.addActionListener(this);
		lblSun.setFont(font14);
		lblMon.setFont(font14);
		lblTues.setFont(font14);
		lblWed.setFont(font14);
		lblThurs.setFont(font14);
		lblFri.setFont(font14);
		lblSat.setFont(font14);
		btYearL.setFont(font14);
		btYearR.setFont(font14);
		btMonthL.setFont(font14);
		btMonthR.setFont(font14);
		txtYear.setFont(font14);
		txtMonth.setFont(font14);
		setLayout(null);
		btYearL.setBounds(5, 5, 50, 25);
		txtYear.setBounds(60, 5, 50, 25);
		btYearR.setBounds(115, 5, 50, 25);
		btMonthL.setBounds(170, 5, 50, 25);
		txtMonth.setBounds(225, 5, 50, 25);
		btMonthR.setBounds(280, 5, 50, 25);
		lblSun.setBounds(0, 35, 50, 25);
		lblMon.setBounds(50, 35, 50, 25);
		lblTues.setBounds(100, 35, 50, 25);
		lblWed.setBounds(150, 35, 50, 25);
		lblThurs.setBounds(200, 35, 50, 25);
		lblFri.setBounds(250, 35, 50, 25);
		lblSat.setBounds(300, 35, 50, 25);
		lblSun.setForeground(Color.red);
		lblSat.setForeground(Color.red);
		int x = 0;
		int y = 65;
		for (int i = 1;
i < btDay.length;
i++) {
			btDay[i].setBounds(x, y, 50, 25);
			btDay[i].setFont(font12);
			if (i % 7 == 0) {
				x = 0;
				y += 30;
			}
			else
 {
				x += 50;
			}
			add(btDay[i]);
		}
		paintDay(0, 0, 0);
		add(btYearL);
		add(txtYear);
		add(btYearR);
		add(btMonthL);
		add(txtMonth);
		add(btMonthR);
		add(lblSun);
		add(lblMon);
		add(lblTues);
		add(lblWed);
		add(lblThurs);
		add(lblFri);
		add(lblSat);
	}
	protected void paintDay(int year, int month, int date) {
		Calendar today = Calendar.getInstance();
		Calendar pointer = (Calendar) today.clone();
		Color btFColor = btYearL.getForeground();
		Color btBColor = btYearL.getBackground();
		if (year != 0)
			pointer.set(Calendar.YEAR, year);
		if (month != 0)
			pointer.set(Calendar.MONTH, month - 1);
		if (date != 0)
			pointer.set(Calendar.DAY_OF_MONTH, date);
		curYear = pointer.get(Calendar.YEAR);
		curMonth = pointer.get(Calendar.MONTH) + 1;
		curDate = pointer.get(Calendar.DATE);
		txtYear.setText(curYear + "年");
		txtMonth.setText(curMonth + "月");
		
		pointer.set(Calendar.DATE, 1);
		int dayOfWeek = pointer.get(Calendar.DAY_OF_WEEK);
		int maxDay = pointer.getActualMaximum(Calendar.DAY_OF_MONTH);
		for (int i = 0;
i < dayOfWeek - 1;
i++) {
			btDay[i + 1].setText("");
		}
		for (int i = 1;
i <= maxDay;
i++) {
			btDay[dayOfWeek + i - 1].setText(String.valueOf(i));
			pointer.set(Calendar.DATE, i);
			
			if(today.equals(pointer)){
				btDay[dayOfWeek + i - 1].setForeground(Color.white);
				btDay[dayOfWeek + i - 1].setBackground(Color.blue);
			}
			else
{
				btDay[dayOfWeek + i - 1].setForeground(btFColor);
				btDay[dayOfWeek + i - 1].setBackground(btBColor);
			}
		}
		for (int i = maxDay + dayOfWeek;
i < btDay.length;
i++) {
			btDay[i].setText("");
		}
	}
	public void actionPerformed(ActionEvent e) {
		int preMonth = curMonth - 1;
		int nextMonth = curMonth + 1;
		if (preMonth < 1)
			preMonth = 12;
		if (nextMonth > 12)
			nextMonth = 1;
		if (e.getSource() == btYearL)
			//			JOptionPane.showMessageDialog(this, "");
			paintDay(curYear - 1, curMonth, 1);
		if (e.getSource() == btYearR)
			paintDay(curYear + 1, curMonth, 1);
		if (e.getSource() == btMonthL)
			paintDay(curYear, preMonth, 1);
		if (e.getSource() == btMonthR)
			paintDay(curYear, nextMonth, 1);
		if (e.getActionCommand().equals("day")) {
			String date = ((JButton) e.getSource()).getText().trim();
			String day = "";
			
			if(date.length()>0)
				day += curYear + "/" + curMonth + "/" + date;
			JTextField b = (JTextField) ob;
//			JButton b = (JButton) ob;
			b.setText(day);
//			JComponent dialog = (JComponent) parent;
			parent.setVisible(false);
//			dialog.setVisible(false);
		}
	}
}