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java 日历窗口小程序

标签：java基础

功能：

1.按月翻页。2.输入月份年份，直接跳转。

效果图：

//CalendarMainClass.javapublic class CalendarMainClass{
       public static void main(String args[]){        CalendarFrame frame = new CalendarFrame();        frame.setBounds(100, 100, 360, 300);        frame.setVisible(true);        frame.setYearAndMonth(2017, 12);    }}

//CalendarBean.javaimport java.util.Calendar;public class CalendarBean{
       int year = 2017, month = 12;    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;    }    public String [] getCalendar(){        String [] a = new String[42];  //日历最多可达6行        Calendar rili = Calendar.getInstance();        rili.set(year, month - 1, 1);  //模拟翻日历        int weekDay = rili.get(Calendar.DAY_OF_WEEK) - 2;  ///计算出1号的星期        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;        }        //if(weekDay == 0)  weekDay += 7;        for(int i = 0; i < weekDay; i++)  a[i] = " ";  //日历顺序输出，格式控制        for(int i = weekDay, n = 1; i < weekDay + day; i++){            a[i] = String.valueOf(n);            n++;        }        for(int i = weekDay + day; i < a.length; i++)  a[i] = " ";        return a;    }}

//CalendarFrame.javaimport java.util.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;public class CalendarFrame extends JFrame implements ActionListener{
       JLabel labelDay[] = new JLabel[42];    JButton titleName [] = new JButton[7];    String name [] = {
  "一", "二", "三", "四", "五", "六", "日"};    JButton nextMonth, previousMonth, go;    JTextField textYear, textMonth;    CalendarBean calendar;    JLabel showMessage = new JLabel("", JLabel.CENTER);    int year = 2017, month = 12;    public CalendarFrame(){        JPanel pCenter = new JPanel();        pCenter.setLayout(new GridLayout(7, 7));        for(int i = 0; i < 7; i++){            titleName[i] = new JButton(name[i]);            titleName[i].setBorder(new SoftBevelBorder(BevelBorder.RAISED));            pCenter.add(titleName[i]);        }        for(int i = 0; i < 42; i++){            labelDay[i] = new JLabel("", JLabel.CENTER);            labelDay[i].setBorder(new SoftBevelBorder(BevelBorder.RAISED));            pCenter.add(labelDay[i]);        }        calendar = new CalendarBean();        nextMonth = new JButton("next");        previousMonth = new JButton("previous");        go = new JButton("goto");        textYear = new JTextField(4);        textMonth = new JTextField(2);        nextMonth.addActionListener(this);        previousMonth.addActionListener(this);        go.addActionListener(this);        JPanel pNorth = new JPanel(), pSouth = new JPanel();        pNorth.add(previousMonth);        pNorth.add(showMessage);        pNorth.add(nextMonth);        pSouth.add(textYear);        pSouth.add(textMonth);        pSouth.add(go);        add(pCenter, BorderLayout.CENTER);        add(pNorth, BorderLayout.NORTH);        add(pSouth, BorderLayout.SOUTH);        setYearAndMonth(year, month);        setDefaultCloseOperation(DISPOSE_ON_CLOSE);    }    public void setYearAndMonth(int y, int m){        calendar.setYear(y);        calendar.setMonth(m);        String day[] = calendar.getCalendar();        /*        for(int i = 0; i < 42; i++){            if(i % 7 == 0)  System.out.println("");            System.out.printf("%4s", day[i]);        }        */        for(int i = 0; i < 42; i++)  labelDay[i].setText(day[i]);        showMessage.setText(calendar.getYear() + "/" + calendar.getMonth());    }    public void actionPerformed(ActionEvent e){        if(e.getSource() == nextMonth){  //下一个月            month += 1;            if(month > 12){                year += 1;                month = 1;            }            calendar.setYear(year);            calendar.setMonth(month);            String day[] = calendar.getCalendar();            for(int i = 0; i < 42; i++)  labelDay[i].setText(day[i]);        }        else  if(e.getSource() == previousMonth){  //上一个月            month -= 1;            if(month < 1){                year -= 1;                month = 12;            }            calendar.setYear(year);            calendar.setMonth(month);            String day[] = calendar.getCalendar();            for(int i = 0; i < 42; i++)  labelDay[i].setText(day[i]);        }        else  if(e.getSource() == go){  //跳转            year = Integer.parseInt(textYear.getText().trim());            month = Integer.parseInt(textMonth.getText().trim());            calendar.setYear(year);            calendar.setMonth(month);            String day[] = calendar.getCalendar();            for(int i = 0; i < 42; i++)  labelDay[i].setText(day[i]);        }        showMessage.setText(calendar.getYear() + "/" + calendar.getMonth());    }}