Java写的日历小程序,算法效率虽然不算很高,却是简单实用的
CalendarBean.java
- import java.util.Calendar;
-
-
public class CalendarBean
- {
- String day[];
-
int year=2005,month=0;
-
public void setYear(int year)
- {
-
this.year=year;
- }
-
-
public int getYear()
- {
-
return year;
- }
-
-
public void setMonth(int month)
- {
-
this.month=month;
- }
-
-
public int getMonth()
- {
-
return month;
- }
-
-
public String[] getCalendar()
- {
-
String a[]=new String[42];
- Calendar date=Calendar.getInstance();
-
date.set(year,month-1,1);
-
int week=date.get(Calendar.DAY_OF_WEEK)-1;
-
int day=0;
-
-
-
if(month==1||month==3||month==5||month==7
-
||month==8||month==10||month==12)
- {
-
day=31;
- }
-
-
-
if(month==4||month==6||month==9||month==11)
- {
-
day=30;
- }
-
-
-
if(month==2)
- {
-
if(((year%4==0)&&(year%100!=0))||(year%400==0))
- {
-
day=29;
- }
-
-
else
- {
-
day=28;
- }
- }
-
-
for(int i=week,n=1;i<week+day;i++)
- {
- a[i]=String.valueOf(n) ;
- n++;
- }
-
return a;
- }
- }
CalendarFrame.java
- import java.awt.*;
-
import java.awt.event.*;
-
import javax.swing.*;
-
-
public class CalendarFrame extends JFrame implements ActionListener
- {
-
JLabel labelDay[]=new JLabel[42];
-
JTextField text=new JTextField(10);
-
JButton titleName[]=new JButton[7];
-
JButton button = new JButton();
-
String name[]={"日","一","二","三", "四","五","六"};
- JButton nextMonth,previousMonth;
-
int year=1996,month=1;
- CalendarBean calendar;
-
JLabel showMessage=new JLabel("",JLabel.CENTER);
-
JLabel lbl1 = new JLabel("请输入年份:");
-
JLabel lbl2=new JLabel(" ");
-
-
public CalendarFrame()
- {
-
JPanel pCenter=new JPanel();
-
-
-
pCenter.setLayout(new GridLayout(7,7));
-
-
-
for(int i=0;i<7;i++)
- {
-
titleName[i]=new JButton(name[i]);
- pCenter.add(titleName[i]);
- }
-
-
-
for(int i=0;i<42;i++)
- {
-
labelDay[i]=new JLabel("",JLabel.CENTER);
- pCenter.add(labelDay[i]);
- }
-
-
text.addActionListener(this);
-
calendar=new CalendarBean();
- calendar.setYear(year);
- calendar.setMonth(month);
- String day[]=calendar.getCalendar();
-
-
for(int i=0;i<42;i++)
- {
- labelDay[i].setText(day[i]);
- }
-
-
nextMonth=new JButton("下月");
-
previousMonth=new JButton("上月");
-
button=new JButton("确定");
-
-
-
nextMonth.addActionListener(this);
-
previousMonth.addActionListener(this);
-
button.addActionListener(this);
-
-
JPanel pNorth=new JPanel(),
-
pSouth=new JPanel();
- pNorth.add(showMessage);
- pNorth.add(lbl2);
- pNorth.add(previousMonth);
- pNorth.add(nextMonth);
- pSouth.add(lbl1);
- pSouth.add(text);
- pSouth.add(button);
-
showMessage.setText("日历:"+calendar.getYear()+"年"+ calendar.getMonth()+"月" );
-
ScrollPane scrollPane=new ScrollPane();
- scrollPane.add(pCenter);
-
add(scrollPane,BorderLayout.CENTER);
-
add(pNorth,BorderLayout.NORTH);
-
add(pSouth,BorderLayout.SOUTH);
-
- }
-
-
public void actionPerformed(ActionEvent e)
- {
-
if(e.getSource()==nextMonth)
- {
-
month=month+1;
-
if(month>12)
-
month=1;
- calendar.setMonth(month);
- String day[]=calendar.getCalendar();
-
-
for(int i=0;i<42;i++)
- {
- labelDay[i].setText(day[i]);
- }
- }
-
else if(e.getSource()==previousMonth)
- {
-
month=month-1;
-
if(month<1)
-
month=12;
- calendar.setMonth(month);
- String day[]=calendar.getCalendar();
-
-
for(int i=0;i<42;i++)
- {
- labelDay[i].setText(day[i]);
- }
- }
-
else if(e.getSource()==button)
- {
-
month=month+1;
-
if(month>12)
-
month=1;
- calendar.setYear(Integer.parseInt(text.getText()));
- String day[]=calendar.getCalendar();
-
for(int i=0;i<42;i++)
- {
- labelDay[i].setText(day[i]);
- }
- }
-
showMessage.setText("日历:"+calendar.getYear()+"年"+calendar.getMonth()+"月" );
- }
- }
-
-
CalendarMainClass .java
- import javax.swing.JFrame;
-
import javax.swing.UIManager;
-
-
public class CalendarMainClass
- {
-
public static void main(String args[])
- {
-
try {
-
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
-
}catch (Exception e) {
- e.printStackTrace();
- }
-
CalendarFrame frame=new CalendarFrame();
-
frame.setBounds(100,100,360,300);
-
frame.setTitle("日历小程序");
-
frame.setLocationRelativeTo(null);
-
frame.setVisible(true);
- frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
- }
- }
程序的效果图:
本文转自 lingdududu 51CTO博客,原文链接:
http://blog.51cto.com/liangruijun/625909