//Start.java
import java.awt.*
import javax.swing.*
class Start{
public static void main(String [] args){
DateFrame frame=new DateFrame()
frame.setLocationRelativeTo(frame)
frame.setResizable(false)
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
frame.setVisible(true)
}
}
//DateInfo.java
import java.util.*
public class DateInfo{
private int mYear, mMonth
private int mDayOfMonth, mFristWeek
public DateInfo(int year, int month) throws DateException{
mYear = year
if (month <0 || month >12){
throw (new DateException())
}
mMonth = month
mDayOfMonth = getDayOfMonth(mYear, mMonth)
mFristWeek = getFristWeek(mYear, mMonth)
}
private int getDayOfMonth(int year, int month){
int[][] ary = {{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}}
return (ary[isLeapYear(year)][month])
}
private int isLeapYear(int year){
if (year % 4 == 0 &&year % 100 != 0 ||year % 400 == 0){
return (1)
}
else{
return (0)
}
}
private int getFristWeek(int year, int month){
java.util.Calendar cal = Calendar.getInstance()
cal.set(year, month - 1, 1)
return (cal.get(Calendar.DAY_OF_WEEK) - 1)
}
public String toString(){
String str
str = "\t\t" + mYear + "年" + mMonth + "月\n"
str += "日\t一\t二\t三\t四\t五\t六\n"
int i
for (i = 1i <= mFristWeeki++){
str += " \t"
}
for (int j = 1j <= mDayOfMonthj++, i++){
str +=j+"\t"
if (i % 7 == 0){
str += "\n"
}
}
return (str)
}
}
//DateFrame.java
import java.awt.*
import java.awt.event.*
import javax.swing.*
import java.util.Calendar
class DateFrame extends JFrame implements Runnable{
Calendar date=Calendar.getInstance()
String[] str={"1","2","3","4","5","6","7","8","9","10","11","12"}
JLabel lblYear=new JLabel("年 ")
JLabel lblMonth=new JLabel("月 ")
JLabel lblDate=new JLabel("现在的时间是:")
JLabel lblShowDate=new JLabel()
// javax.swing.JTextField trxt =new JTextField(10)
// trxt.setHorizontalAlignment(JTextField.RIGHT) //设置文本从右边输入
JComboBox cboMonth=new JComboBox(str)
JComboBox cboYear=new JComboBox()
JTextArea txaShow=new JTextArea()
JPanel pnlNorth=new JPanel()
JPanel pnlSOUTH=new JPanel()
JButton btnShow=new JButton("显示")
JButton btnClose=new JButton("关闭")
JScrollPane jsp=new JScrollPane(txaShow)
Container c=this.getContentPane()
public DateFrame(){
Thread thread=new Thread(this)
thread.start()
this.setTitle("玩玩日历拉!!!")
this.setSize(300,260)
for (int i = 1990i<=2025i++) {
cboYear.addItem(""+i)
}
cboYear.setSelectedItem(""+(date.get(Calendar.YEAR)))
cboMonth.setSelectedItem(""+(date.get(Calendar.MONTH)+1))
pnlNorth.add(cboYear)
txaShow.setTabSize(4) //设置tab键的距离
txaShow.setForeground(Color.GREEN)
pnlNorth.add(lblYear)
pnlNorth.add(cboMonth)
pnlNorth.add(lblMonth)
pnlNorth.add(lblDate)
pnlNorth.add(lblShowDate)
c.add(pnlNorth,BorderLayout.NORTH)
c.add(jsp)
pnlSOUTH.add(btnShow)
pnlSOUTH.add(btnClose)
c.add(pnlSOUTH,BorderLayout.SOUTH)
btnShow.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int year=Integer.parseInt((String)cboYear.getSelectedItem())
int month=Integer.parseInt((String)cboMonth.getSelectedItem())
try {
DateInfo date=new DateInfo(year,month)
txaShow.setText(""+date)
}
catch (DateException ex) {
ex.printStackTrace()
}
}
})
btnClose.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
System.exit(0)
}
})
}
public void run(){
try {
while(true){
Thread.sleep(1000)
int hour=date.get(Calendar.HOUR)
int minute=date.get(Calendar.MINUTE)
int second=date.get(Calendar.SECOND)
String str=hour+":"+minute+":"+second
lblShowDate.setText(str)
//this.repaint()
}
}
catch (Exception ex) {
ex.printStackTrace()
}
}
}
//DateException.java
public class DateException extends Exception{
public DateException(){
super("日期数据不合法.")
}
}
System.out.println(cal.get(Calendar.MONDAY)+1+"月"+(cal.get(Calendar.DAY_OF_MONTH)+1)+"日") //输出日期欢迎分享,转载请注明来源:内存溢出
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