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() {
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”);
}
}