效果图:
主要思想：日历最核心的功能就是能显示某年某月对应的日期和星期几。因此只要实现传入具体的年份和月份，得到一组存放了日期的数组a[ ]即可。其中数组的大小设置成42，要考虑的问题是当月的第一天对应星期几。日期数组中的前七个，肯定包含了当月的第一天，把这一天找到，将“1”填入，后面的日期依次累加直到加完该月最后一天为止。
MyCalendar类：
得到用于显示日期数组a[ ]
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import java.util.Calendar;public class MyCalendar {String day[];int year = 2020,month=0;public String[] getDay() {return day;}public void setDay(String[] day) {this.day = day;}public int getYear() {return year;}public void setYear(int year) {this.year = year;}public int getMonth() {return month;}public void setMonth(int month) {this.month = month;}private boolean isLeapYear() {if(this.year%4==0 && this.year%100!=0){return true;}elseif(this.year%400==0){return true;}elsereturn false;}//获得显示数组public String[] getCalendar(){Calendar calendar=Calendar.getInstance();String a[]=new String[42];calendar.set(year,month-1,1);int weekday=calendar.get(Calendar.DAY_OF_WEEK)-1;int day=0;int days = 31;if (this.month == 4 || this.month == 6 || this.month == 9 || this.month == 11)days = 30;if (this.month == 2 && isLeapYear())days = 29;if (this.month == 2 && !isLeapYear())days = 28;for(int i = weekday,n=1;i< weekday +days;i++){a[i]=String.valueOf(n);n++;}return a;}} |
MyFrame类：
创造显示面板，主要用到JTable。
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public class MyFrame extends JFrame implements ActionListener {//存储数据MyCalendar calendar = new MyCalendar();JComboBox choiceYear,choiceMonth;JTable table = null;JPanel root = new JPanel();JLabel lyear, lmonth;private Object[] name = {"日","一","二","三","四","五","六"};private TableModel tableModel = new DefaultTableModel(name,6);// private static int row = 6;// private static int column = 7;public MyFrame(String title) {super(title);this.setContentPane(root);root.setLayout(new BorderLayout());//年月选择栏choiceYear=new JComboBox();choiceMonth=new JComboBox();lyear=new JLabel("年");lmonth=new JLabel("月 ");for(int i=1990;i<2050;i++)choiceYear.addItem(i);choiceYear.addActionListener(this);for(int i=1;i<=12;i++)choiceMonth.addItem(i);choiceMonth.addActionListener(this);JPanel pNorth=new JPanel();pNorth.add(choiceYear);pNorth.add(lyear);pNorth.add(choiceMonth);pNorth.add(lmonth);root.add(pNorth,BorderLayout.NORTH);// 表格初始化setYearAndMonth( 1990, 1);}//设置年月日public void setYearAndMonth(int y,int m){calendar.setYear(y);calendar.setMonth(m);String day[]=calendar.getCalendar();Vector<Object> rowData = new Vector<>();int row = 0;int column = 0;for(int i = 0; i< 42; i++) {row = i / 7;column = i % 7;tableModel.setValueAt(day[i], row, column);}// 创建 JTable，直接重写 isCellEditable()，设为不可编辑table = new JTable(tableModel){@Overridepublic boolean isCellEditable(int row, int column){return false;} };JScrollPane scrollPane = new JScrollPane(table);root.add(scrollPane, BorderLayout.CENTER);// 添加到主界面 table.setFillsViewportHeight(true); table.setRowSelectionAllowed(true); // 整行选择table.setRowHeight(30); } public void actionPerformed(ActionEvent e){//选择年份if (e.getSource()==choiceYear){calendar.setYear((Integer) choiceYear.getSelectedItem());String day[]=calendar.getCalendar();Vector<Object> rowData = new Vector<>();int row = 0;int column = 0;for(int i = 0; i< 42; i++) {row = i / 7;column = i % 7;tableModel.setValueAt(day[i], row, column);}table = new JTable(tableModel){@Overridepublic boolean isCellEditable(int row, int column){return false;} };JScrollPane scrollPane = new JScrollPane(table);root.add(scrollPane, BorderLayout.CENTER);// 添加到主界面 table.setFillsViewportHeight(true); table.setRowSelectionAllowed(true); // 整行选择table.setRowHeight(30); }//选择月份else if (e.getSource()==choiceMonth){calendar.setMonth((Integer) choiceMonth.getSelectedItem());String day[]=calendar.getCalendar();Vector<Object> rowData = new Vector<>();int row = 0;int column = 0;for(int i = 0; i< 42; i++) {row = i / 7;column = i % 7;tableModel.setValueAt(day[i], row, column);}}table = new JTable(tableModel){@Overridepublic boolean isCellEditable(int row, int column){return false;} };JScrollPane scrollPane = new JScrollPane(table);root.add(scrollPane, BorderLayout.CENTER);// 添加到主界面 table.setFillsViewportHeight(true); table.setRowSelectionAllowed(true); // 整行选择table.setRowHeight(30); }} |
ShowView类：
用于显示窗口，照抄即可，无需理解。
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import java.awt.Container;import java.awt.FlowLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;public class ShowView{ private static void createGUI() { // 语法：因为MyFrame是JFrame的子类，所以可以这么写 JFrame frame = new MyFrame("日历"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置窗口的其他参数，如窗口大小 frame.setSize(400, 300); // 显示窗口 frame.setVisible(true); } public static void main(String[] args) { // 此段代码间接地调用了 createGUI() javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createGUI(); } }); }} |
以上就是Java JTable 实现日历的示例的详细内容，更多关于Java JTable 实现日历的资料请关注服务器之家其它相关文章！
原文链接：https://www.cnblogs.com/qianji-7/p/13759500.html
