今天小编给大家分享一下Java如何实现窗体程序显示日历的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
实训要求：
代码：
Test类：
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Test extends JFrame { JButton week1, week2, week3, week4, week5, week6, week7, next, pro; CalendaBean cb = new CalendaBean(); JLabel[] label; JLabel now; public static void main(String[] args) { Test frame = new Test(); frame.setBounds(650,300,550,550); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setTitle("日历"); frame.setVisible(true); } public Test() { int year, month; setLayout(new BorderLayout()); JPanel pNorth = new JPanel(); cb = new CalendaBean(); cb.setYear(2017); cb.setMonth(11); String[] a = cb.getCalendar(); next = new JButton("上月"); pro = new JButton("下月"); next.setActionCommand("lastmonth"); pro.setActionCommand("nextmonth"); next.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { cb.actionPerformed(e); } }); pro.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { cb.actionPerformed(e); } }); pNorth.add(next); pNorth.add(pro); add(pNorth, BorderLayout.NORTH); GridLayout grid = new GridLayout(8, 7); JPanel pCenter = new JPanel(); week1 = new JButton("日"); week2 = new JButton("一"); week3 = new JButton("二"); week4 = new JButton("三"); week5 = new JButton("四"); week6 = new JButton("五"); week7 = new JButton("六"); pCenter.add(week1); pCenter.add(week2); pCenter.add(week3); pCenter.add(week4); pCenter.add(week5); pCenter.add(week6); pCenter.add(week7); label = new JLabel[42]; for (int i = 0; i < 42; i++) { label[i] = new JLabel(); pCenter.add(label[i]); } cb.label = this.label; for (int i = 0; i < a.length; i++) { if (i % 7 == 0) { label[i].setText(""); } label[i].setText(" "+a[i]); } pCenter.setLayout(grid); add(pCenter, BorderLayout.CENTER); JPanel pSouth = new JPanel(); now = new JLabel(); now.setText("日历:" + cb.year + "年" + cb.month + "月"); cb.now = now; pSouth.add(now); add(pSouth, BorderLayout.SOUTH); } }CalendaBean类：
import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Calendar; import javax.swing.*; public class CalendaBean implements ActionListener { JLabel[] label; JLabel now; String[] day; int year = 0, month = 0; public void setYear(int year) { this.year = year; } public void setMonth(int month) { this.month = month; } public void actionPerformed(ActionEvent e) { String str = e.getActionCommand(); if (str.equals("lastmonth")) { month--; if (month == 0) { month = 12; year--; } } else if (str.equals("nextmonth")) { month++; if (month == 13) { month = 1; year++; } } now.setText("日历:" + year + "年" + month + "月"); String[] a = getCalendar(); for (int i = 0; i < a.length; i++) { if (i % 7 == 0) { label[i].setText(""); } label[i].setText(" "+a[i]); } } public String[] getCalendar() { String[] a = new String[42]; Calendar rili = Calendar.getInstance(); rili.set(year, month - 1, 1); int weekDay = rili.get(Calendar.DAY_OF_WEEK) - 1; 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; } for (int i = 0; i < weekDay; i++) a[i] = ""; 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; } }运行结果:
以上就是“Java如何实现窗体程序显示日历”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注编程网行业资讯频道。
