Java日历

package SWT;
import javax.swing.*;
import java.awt.*;
import java.util.Calendar;
import java.util.Date;
import java.awt.event.*;
public class MyCalendar extends JFrame {
JLabel labels[][];//用于设定日历的内容
int months[]={31,28,31,30,31,30,31,31,30,31,30,31};
private int year;//获取是哪一年
private int month;//获取月份的信息
private int days;//看这个月共多少天
private int index;//判断这个月的第一天是周几
JPanel pCenter;
JTextField text;
public static void main(String[]args)
{
MyCalendar calendar = new MyCalendar();
calendar.setVisible(true);
}
/**
*
*/
public MyCalendar()
{
setTitle("章式日历");
setBounds(100,100,356,356);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pCenter = new JPanel();
pCenter.setBackground(Color.pink);
GridLayout gridLayout = new GridLayout(7,7);
gridLayout.setVgap(10);
gridLayout.setHgap(10);
pCenter.setLayout(gridLayout);
getContentPane().add(pCenter,BorderLayout.CENTER);
labels = new JLabel[7][7];
String week[] = {"日","一","二","三","四","五","六"};
for(int i = 0;i < 7;i++)
{
labels[0][i]= new JLabel(week[i]);
pCenter.add(labels[0][i]);
}
for(int i = 1;i < 7;i++)
{
for(int j = 0;j < 7;j++)
{
labels[i][j]= new JLabel(" ");
pCenter.add(labels[i][j]);
}
}
Date date = new Date();
String year1 = String.format("%tY",date);
String month1 = String.format("%tm", date);
year = Integer.valueOf(year1);
month = Integer.valueOf(month1) - 1;
getIndex(year,month);
setArray(index);
JPanel pSouth = new JPanel();
pSouth.setBackground(Color.green);
pSouth.setLayout(new FlowLayout());
String t = "日历:"+year+"年"+(month+1)+"月";
text = new JTextField(t);
text.setEditable(false);
pSouth.add(text);
getContentPane().add(pSouth,BorderLayout.SOUTH);
JPanel pNorth = new JPanel();
pNorth.setBackground(Color.bule);
pNorth.setLayout(new FlowLayout());
JButton previousMonth = new JButton("上月"); JButton nextMonth = new JButton("下月"); previousMonth.addActionListener(new ButtonAction()); nextMonth.addActionListener(new ButtonAction()); pNorth.add(previousMonth);
pNorth.add(nextMonth);
getContentPane().add(pNorth,BorderLayout.NORTH); final JLabel left = new JLabel();
left.setPreferredSize(new Dimension(10,0));
getContentPane().add(left,BorderLayout.WEST);
final JLabel right = new JLabel();
right.setPreferredSize(new Dimension(10,0));
getContentPane().add(right,BorderLayout.EAST);
}
//得到某个月第一天是周几，和这个月共有多少天public void getIndex(int year,int month)
{
this.year = year;
this.month = month;
Calendar calendar = Calendar.getInstance();
calendar.set(year,month,1);
index = calendar.get(Calendar.DAY_OF_WEEK) - 1;
if(month == 1)
{
if(year%100 == 0 && year%400 ==0)
{
days = 29;
}
else if(year%4 == 0 )
{
days = 29;
}
else
days = months[1];
}
else
{
days = months[month];
}
}
//设置数组的填充内容
public void setArray(int index)
{
for(int i = 1;i < 7;i++)
{
for(int j = 0;j < 7;j++)
{
labels[i][j].setText(" ");
}
}
int day = 1;
for(int i = index;i < 7;i++)
{
labels[1][i].setText(String.valueOf(day++));
}
for(int i = 2;i < 7;i++)
{
for(int j = 0;j < 7;j++)
{
if(day<= days)
{
labels[i][j].setText(String.valueOf(day++));
}
}
}
}
class ButtonAction implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
JButton button = (JButton)e.getSource();
String buttonName = e.getActionCommand();
if(buttonName.equals("上月"))
{
month = month-1;
if(month < 0)
{
year = year-1;
month = 11;
}
}
else
{
month = month + 1;
if(month > 11)
{
year = year + 1;
month = 0;
}
}
getIndex(year,month);
setArray(index);
text.setText("日历:"+year+"年"+(month+1)+"月");
}
}
}。