java版的日历程序

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//MainFrame.java

package com.huowolf.myCalender;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.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 = 90464999L;JPanel panel = new JPanel(new BorderLayout());JPanel panel1 = new JPanel();JPanel panel2 = new JPanel(new GridLayout(7, 7));JPanel panel3 = new JPanel();JLabel[] labels = new JLabel[49];JLabel y_label = new JLabel("年份");JLabel m_label = new JLabel("月份");JComboBox<String> com1 = new JComboBox<String>();JComboBox<String> com2 = new JComboBox<String>();int re_year,re_mouth;int x_size,y_size;//得到一个当前时间的日历对象Calendar now = Calendar.getInstance();public MainFrame() {super("万年历");setSize(300, 300);//获取屏幕宽度x_size = (int) Toolkit.getDefaultToolkit().getScreenSize().getWidth();//获取屏幕高度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++) {            labels[i] = new JLabel("", JLabel.CENTER);// 将显示的字符设置为居中            panel2.add(labels[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);        //禁止拖动        setResizable(false);}class ClockAction implements ActionListener {            public void actionPerformed(ActionEvent e) {                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++) {            labels[i].setText(log[i]);        }        for (int i = 0; i < 49; i = i + 7) {            labels[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) {            labels[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;    }    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 =1;        month_day_score = 0;                Calendar cal = Calendar.getInstance();        /*cal.set(year_log+1900, month_log + 1, 1);        cal.add(Calendar.MONTH, -1); // 前个月        */         cal.set(year_log+1900, month_log, 1);        month_day_score = cal.getActualMaximum(Calendar.DAY_OF_MONTH);//得到一个月中最后一天        for (int i = 7; i < 49; i++) { // 初始化标签（除去前七个标签的下标值）            labels[i].setText("");        }        month_day_score = month_day_score + week_log;        for (int i = week_log; i < month_day_score; i++, count++) {            labels[i+6].setText(count + "");//加上前七个标签的下标值        }    }public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true);//为新创建的 JDialog提供其 Window 装饰的提示。 new MainFrame();}}

//Clock.java

package com.huowolf.myCalender;import java.awt.Canvas;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.text.SimpleDateFormat;import java.util.Calendar;public class Clock extends Canvas implements Runnable{private static final long serialVersionUID = 82782L;private Thread t;private String time;          public Clock (MainFrame mf){        setSize(280,40);        setBackground(Color.white);        t=new Thread(this);                //实例化线程        t.start();                          }@Overridepublic void run() {while(true) {try {Thread.sleep(1000);    //休眠1秒钟} catch (InterruptedException e) {System.out.println("发生异常");}   repaint(100);//在100毫秒内重绘组件}}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);}}

//很不错的程序，根据网络总结的，值得学习!

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