Question

java如何在窗口中显示日历

package 显示日历;
import javax.swing.JOptionPane;
public class 显示日历 {
public static void main(String[] args) {
String yString = JOptionPane.showInputDialog(null,"Enter full year (e.g.:2001)","日历",JOptionPane.QUESTION_MESSAGE);
int year = Integer.parseInt(yString);

String mString = JOptionPane.showInputDialog(null,"Enter month in number between 1 and 12","日历",JOptionPane.QUESTION_MESSAGE);
int month = Integer.parseInt(mString);

printMonth(year,month);
}

public static void printMonth(int year, int month) {
printMonthTitle(year,month);
printMonthBody(year,month);
}

public static void printMonthTitle(int year, int month){
String a =" "+ getMonthName(month)+" " + year
+"\n----------------------------"
+"\nSun Mon Tue Wed Thu Fri Sat ";
}

public static String getMonthName(int month){
String monthName = " ";
switch(month){
case 1: monthName = "January"; break;
case 2: monthName = "February"; break;
case 3: monthName = "March"; break;
case 4: monthName = "April"; break;
case 5: monthName = "May"; break;
case 6: monthName = "June"; break;
case 7: monthName = "July"; break;
case 8: monthName = "August"; break;
case 9: monthName = "September"; break;
case 10: monthName = "October"; break;
case 11: monthName = "November"; break;
case 12: monthName = "December";
}
return monthName;
}
public static void printMonthBody(int year, int month) {
int startDay = getStartDay(year, month);
int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month);

int i=0;
String b;
for(i=0;i<startDay;i++)
b = " ";
for(i=1;i<=numberOfDaysInMonth;i++){
System.out.printf("%4d",i);

if((i+startDay)%7==0)
System.out.println();
}
System.out.println();
}

public static int getStartDay(int year, int month) {
final int START_DAY_FOR_JAN_1_1800 = 3;
int totalNumberOfDays = getTotalNumberOfDays(year, month);
return (totalNumberOfDays+START_DAY_FOR_JAN_1_1800)%7;
}
public static int getTotalNumberOfDays(int year, int month){
int total = 0;
for(int i=1800;i<year;i++)
if(isLeapYear(i))
total=total+366;
else
total=total+365;
for(int i = 1; i < month; i++)
total = total +getNumberOfDaysInMonth(year,i);
return total;
}
public static int getNumberOfDaysInMonth(int year, int month){
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
return 31;
if(month==4||month==6||month==9||month==11)
return 30;
if(month==2)
return isLeapYear(year)?29:28;
return 0;
}

public static boolean isLeapYear(int year){
return year%400==0||(year%4==0&&year%100!=0);
}
}

日历部分怎么用GUI现实阿阿阿 求助！！！！

Answer 1

MainFrame.java是显示日历程序，Clock.java是日历计算程序（可以不要）。
编译后运行MainFrame这个类即可。
 
swing窗口显示万年历，jdk1.4以上环境编译运行。
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133    package org.test;import java.awt.BorderLayout;import java.awt.Color;import java.awt.GridLayout;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.Date;import java.util.Calendar;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class MainFrame extends JFrame { private static final long serialVersionUID = -306484324260972141L; JPanel panel = new JPanel(new BorderLayout()); JPanel panel1 = new JPanel(); JPanel panel2 = new JPanel(new GridLayout(7, 7)); JPanel panel3 = new JPanel(); JLabel[] label = new JLabel[49]; JLabel y_label = new JLabel("年份"); JLabel m_label = new JLabel("月份"); JComboBox com1 = new JComboBox(); JComboBox com2 = new JComboBox(); int re_year, re_month, x_size, y_size; String year_num; Calendar now = Calendar.getInstance(); // 实例化Calendar   MainFrame() {  super("万年历");   setSize(300, 350);  x_size = (int) (Toolkit.getDefaultToolkit().getScreenSize().getWidth());  y_size = (int) (Toolkit.getDefaultToolkit().getScreenSize().getHeight());  setLocation((x_size - 300) / 2, (y_size - 350) / 2);  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  panel1.add(y_label);  panel1.add(com1);  panel1.add(m_label);  panel1.add(com2);  for (int i = 0; i < 49; i++) {   label[i] = new JLabel("", JLabel.CENTER);// 将显示的字符设置为居中    panel2.add(label[i]);  }  panel3.add(new Clock(this));  panel.add(panel1, BorderLayout.NORTH);  panel.add(panel2, BorderLayout.CENTER);  panel.add(panel3, BorderLayout.SOUTH);   panel.setBackground(Color.white);  panel1.setBackground(Color.white);  panel2.setBackground(Color.white);  panel3.setBackground(Color.white);  Init();  com1.addActionListener(new ClockAction());  com2.addActionListener(new ClockAction());  setContentPane(panel);  setVisible(true);  setResizable(false); }   class ClockAction implements ActionListener {  public void actionPerformed(ActionEvent arg0) {   int c_year, c_month, c_week;   c_year = Integer.parseInt(com1.getSelectedItem().toString()); // 得到当前所选年份    c_month = Integer.parseInt(com2.getSelectedItem().toString()) - 1; // 得到当前月份，并减1,计算机中的月为0－11   c_week = use(c_year, c_month); // 调用函数use，得到星期几   Resetday(c_week, c_year, c_month); // 调用函数Resetday   } }   public void Init() {  int year, month_num, first_day_num;  String log[] = { "日", "一", "二", "三", "四", "五", "六" };  for (int i = 0; i < 7; i++) {   label[i].setText(log[i]);  }     for (int i = 0; i < 49; i = i + 7) {   label[i].setForeground(Color.red); // 将星期日的日期设置为红色  }     for (int i = 6; i < 49; i = i + 7) {   label[i].setForeground(Color.green);// 将星期六的日期设置为绿色  }     for (int i = 1; i < 10000; i++) {   com1.addItem("" + i);  }     for (int i = 1; i < 13; i++) {   com2.addItem("" + i);  }     month_num = (int) (now.get(Calendar.MONTH)); // 得到当前时间的月份   year = (int) (now.get(Calendar.YEAR)); // 得到当前时间的年份    com1.setSelectedIndex(year - 1); // 设置下拉列表显示为当前年  com2.setSelectedIndex(month_num); // 设置下拉列表显示为当前月  first_day_num = use(year, month_num);  Resetday(first_day_num, year, month_num); }   public int use(int reyear, int remonth) {  int week_num;  now.set(reyear, remonth, 1); // 设置时间为所要查询的年月的第一天  week_num = (int) (now.get(Calendar.DAY_OF_WEEK));// 得到第一天的星期   return week_num; }    @SuppressWarnings("deprecation") public void Resetday(int week_log, int year_log, int month_log) {  int month_day_score; // 存储月份的天数   int count;  month_day_score = 0;  count = 1;  Date date = new Date(year_log, month_log + 1, 1); // now  Calendar cal = Calendar.getInstance();  cal.setTime(date);  cal.add(Calendar.MONTH, -1); // 前个月  month_day_score = cal.getActualMaximum(Calendar.DAY_OF_MONTH);// 最后一天  for (int i = 7; i < 49; i++) { // 初始化标签   label[i].setText("");  }  week_log = week_log + 6; // 将星期数加6，使显示正确  month_day_score = month_day_score + week_log;  for (int i = week_log; i < month_day_score; i++, count++) {   label[i].setText(count + "");  } }   public static void main(String[] args) {  JFrame.setDefaultLookAndFeelDecorated(true);  new MainFrame(); }}    
12345678910111213141516171819202122232425262728293031323334353637383940414243    package org.test;import java.awt.Color;import java.util.Calendar;import java.awt.Canvas;import java.awt.Font;import java.awt.Graphics;import java.text.SimpleDateFormat;public class Clock extends Canvas implements Runnable{ private static final long serialVersionUID = 3660124045489727166L; MainFrame mf; Thread t; String time;   public Clock(MainFrame mf){  this.mf=mf;  setSize(280,40);  setBackground(Color.white);  t=new Thread(this);//实例化线程  t.start();   //调用线程    }   public void run(){  while(true){   try{    Thread.sleep(1000);//休眠1秒钟   }catch(InterruptedException e){    System.out.println("异常");   }   this.repaint(100);  } }   public void paint(Graphics g){  Font f=new Font("宋体",Font.BOLD,16);  SimpleDateFormat SDF=new SimpleDateFormat("yyyy'年'MM'月'dd'日'HH:mm:ss");//格式化时间显示类型    Calendar now=Calendar.getInstance();  time=SDF.format(now.getTime());        //得到当前日期和时间      g.setFont(f);  g.setColor(Color.orange);  g.drawString(time,45,25); }}

Answer 2

Date date = new Date();//你具体要赋值的Date值
JComboBox comboBox = new JComboBox();//你自己的下拉列表

Calendar cal = Calendar.getInstance();
cal.setTime(date);

int maxWeek =cal.get(Calendar.WEEK_OF_YEAR);
for(int i=1;i<=maxWeek;i++){
comboBox.addItem(i);
}

Answer 3

你使用JTABEL添加进去不久好了嘛

追问

加不进去阿

追答

这个jtable肯定是可以加的，不过要设置一下行和列等信息，我也好久没搞这个swing了，多查查相关资料肯定可以的

追问

表示初学者看不懂....方法不知道怎么加进去.....不过还是谢谢了