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");
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() {
JPanel 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);
}
}
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。
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