java实现日历应用程序设计

本文实例为大家分享了java实现日历应用程序设计的具体代码，供大家参考，具体内容如下

1、效果和要求

*在文本框inputYear中输入年份，验证年份的有效性；按回车键后，显示输入年份的正确日历* 单击previousMonth按钮可以显示当前月的上一月的日历；如果月份小于1，则显示上一年的12月* 单击nextMonth按钮，可以显示当前月的下一月的日历；如果月份大于1，则显示下一年的1月

2、源码

CalendarBean.java

import java.util.Calendar;

public class CalendarBean {

String day[];

int year = 2013, 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;

}

//返回某年某月1号开始的日期数组

public String[] getDays() {

String a[] = new String[42];

Calendar 日历 = Calendar.getInstance();

//注意：1月份是从0开始，所以要减1

日历.set(year, month - 1, 1);

int 星期几 = 日历.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 = 星期几, n = 1; i < 星期几 + day; i++) {

a[i] = String.valueOf(n);

n++;

}

return a;

}

}

CalendarFrame.java

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class CalendarFrame extends JFrame{

JLabel labelDay[] = new JLabel[42];

JLabel labelYear;

JButton titleName[] = new JButton[7];

JButton nextMonth, previousMonth;

JLabel showMessage;

JTextField inputYear;

CalendarBean calendar;

String name[] = { "日", "一", "二", "三", "四", "五", "六" };

int year = 2013, month = 1;

String days[];

public CalendarFrame() {

super("日历应用程序");

calendar = new CalendarBean();

calendar.setYear(year);

calendar.setMonth(month);

days = calendar.getDays();

// 窗口添加scrollPane在中心区

add(getCenterPanel(),BorderLayout.CENTER);

// 窗口添加pNorth 在北面区域

add(getNorthPanel(),BorderLayout.NORTH);

// 窗口添加pSouth 在南区域。

add(getSouthPanel(),BorderLayout.SOUTH);

}

private JPanel getNorthPanel() {

JPanel panel = new JPanel();

labelYear = new JLabel("请输入年份：");

inputYear = new JTextField(10);

previousMonth = new JButton("上月");

nextMonth = new JButton("下月");

/**

* 添加时间监听

*/

inputYear.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

try{

year = Integer.parseInt(inputYear.getText());

}catch (NumberFormatException el){

JOptionPane.showMessageDialog(null,"请输入正确年份！");

}

calendar.setYear(year);

UpdateUI();

}

});

previousMonth.addActionListener(new ActionListener() {//上个月

@Override

public void actionPerformed(ActionEvent e) {

month--;//获取上个月的时间

//System.out.println("Hello World");

if(month<=0){//跳到上一年

year--;

month = 12;

}

UpdateUI();;

}

});

nextMonth.addActionListener(new ActionListener() {//下个月

@Override

public void actionPerformed(ActionEvent e) {

month++;

if(month>12){//到达下一年

year++;

month=1;

}

UpdateUI();;

}

});

panel.add(labelYear,new FlowLayout());

panel.add(inputYear,new FlowLayout());

panel.add(previousMonth,new FlowLayout());

panel.add(nextMonth,new FlowLayout());

return panel;

}

private JPanel getCenterPanel() {

JPanel panel = new JPanel();

// 将panel的布局设置为7行7列的GridLayout布局

panel.setLayout(new GridLayout(7,7));

for (int i = 0; i < 7; i++) {

titleName[i] = new JButton(name[i]);

// panel添加组件titleName[i]

panel.add(titleName[i]);

}

for (int i = 0; i < 42; i++) {

labelDay[i] = new JLabel(days[i], JLabel.CENTER);

// panel添加组件labelDay[i]

panel.add(labelDay[i]);

}

return panel;

}

private JPanel getSouthPanel() {

JPanelhttp:// panel = new JPanel();

showMessage = new JLabel("日历: " + year + "年" + month + "月");

panel.add(showMessage);

return panel;

}

//添加的方法

private void UpdateUI(){

calendar.setYear(year);

calendar.setMonth(month);

days = calendar.getDays();

for (int i = 0; i < 42; i++) {

labelDay[i].setText(days[i]);

}

showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月");

}

}

CalendarMainClass.java

import javax.swing.*;

public class CalendarMainClass {

public static void main(String args[]) {

CalendarFrame frame = new CalendarFrame();

frame.setBounds(100, 100, 360, 320);

frame.setVisible(true);

frame.validate();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}

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