本文实例为大家分享了java实现日历窗口小程序的具体代码，供大家参考，具体内容如下
标签：java基础
功能：
1.按月翻页。
2.输入月份年份，直接跳转。
效果图：
//CalendarMainClass.java
public class CalendarMainClass{
public static void main(String args[]){
CalendarFrame frame = new CalendarFrame();
frame.setBounds(100, 100, 360, 300);
frame.setVisible(true);
frame.setYearAndMonth(2017, 12);
}
}//CalendarBean.java
import java.util.Calendar;
public class CalendarBean{
int year = 2017, month = 12;
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]; //日历最多可达6行
Calendar rili = Calendar.getInstance();
rili.set(year, month - 1, 1); //模拟翻日历
int weekDay = rili.get(Calendar.DAY_OF_WEEK) - 2; ///计算出1号的星期
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;
}
//if(weekDay == 0) weekDay = 7;
for(int i = 0; i < weekDay; i ) a[i] = " "; //日历顺序输出，格式控制
for(int i = weekDay, n = 1; i < weekDay day; i ){
a[i] = String.valueOf(n);
n ;
}
for(int i = weekDay day; i < a.length; i ) a[i] = " ";
return a;
}
}//CalendarFrame.java
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class CalendarFrame extends JFrame implements ActionListener{
JLabel labelDay[] = new JLabel[42];
JButton titleName [] = new JButton[7];
String name [] = {"一", "二", "三", "四", "五", "六", "日"};
JButton nextMonth, previousMonth, go;
JTextField textYear, textMonth;
CalendarBean calendar;
JLabel showMessage = new JLabel("", JLabel.CENTER);
int year = 2017, month = 12;
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]);
titleName[i].setBorder(new SoftBevelBorder(BevelBorder.RAISED));
pCenter.add(titleName[i]);
}
for(int i = 0; i < 42; i ){
labelDay[i] = new JLabel("", JLabel.CENTER);
labelDay[i].setBorder(new SoftBevelBorder(BevelBorder.RAISED));
pCenter.add(labelDay[i]);
}
calendar = new CalendarBean();
nextMonth = new JButton("next");
previousMonth = new JButton("previous");
go = new JButton("goto");
textYear = new JTextField(4);
textMonth = new JTextField(2);
nextMonth.addActionListener(this);
previousMonth.addActionListener(this);
go.addActionListener(this);
JPanel pNorth = new JPanel(), pSouth = new JPanel();
pNorth.add(previousMonth);
pNorth.add(showMessage);
pNorth.add(nextMonth);
pSouth.add(textYear);
pSouth.add(textMonth);
pSouth.add(go);
add(pCenter, BorderLayout.CENTER);
add(pNorth, BorderLayout.NORTH);
add(pSouth, BorderLayout.SOUTH);
setYearAndMonth(year, month);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
public void setYearAndMonth(int y, int m){
calendar.setYear(y);
calendar.setMonth(m);
String day[] = calendar.getCalendar();
/*
for(int i = 0; i < 42; i ){
if(i % 7 == 0) System.out.println("");
System.out.printf("%4s", day[i]);
}
*/
for(int i = 0; i < 42; i ) labelDay[i].setText(day[i]);
showMessage.setText(calendar.getYear() "/" calendar.getMonth());
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == nextMonth){ //下一个月
month = 1;
if(month > 12){
year = 1;
month = 1;
}
calendar.setYear(year);
calendar.setMonth(month);
String day[] = calendar.getCalendar();
for(int i = 0; i < 42; i ) labelDay[i].setText(day[i]);
}
else if(e.getSource() == previousMonth){ //上一个月
month -= 1;
if(month < 1){
year -= 1;
month = 12;
}
calendar.setYear(year);
calendar.setMonth(month);
String day[] = calendar.getCalendar();
for(int i = 0; i < 42; i ) labelDay[i].setText(day[i]);
}
else if(e.getSource() == go){ //跳转
year = Integer.parseInt(textYear.getText().trim());
month = Integer.parseInt(textMonth.getText().trim());
calendar.setYear(year);
calendar.setMonth(month);
String day[] = calendar.getCalendar();
for(int i = 0; i < 42; i ) labelDay[i].setText(day[i]);
}
showMessage.setText(calendar.getYear() "/" calendar.getMonth());
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。