Java JTable 实现日历的示例

网友投稿 280 2022-11-18


Java JTable 实现日历的示例

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[ ]

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;

}else

if(this.year%400==0){

return true;

}else

return false;

}

//获得显示数组

pUOsvKmublic String[] getCalendar(){

Calendar calendar=Calendar.getInstance();

String a[]=new String[42];

calendar.set(year,month-1,1);

int weekday=calendar.get(CUOsvKmalendar.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。

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=newhttp:// 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 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){

@Override

public 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 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){

@Override

public 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 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){

@Override

public 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。

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我们其它相关文章!


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