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Java实现日历小程序【代码】
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这个没啥难点的，主要是界面设计吧
界面就是这个样子
运行时请在src同目录下放上我女神的照片
-----------------------------------代码如下-----------------------------------
import java.awt.*;
import java.awt.event.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.swing.*; public class MyCalendar extends JFrame{
/**
*
*/
private static final long serialVersionUID = 1193245796699646333L;
private JPanel imagePanel,datePanel,p,p2,p3;
private JLabel label,l,l2,l3,l4,l5;
private ImageIcon background;
private JButton b,b2;
private JTextField t;
private JComboBox<String> month_list = new JComboBox<String>();
private Font f = new Font("微软雅黑",Font.PLAIN,15);
private String columns[] = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
private Date now = new Date();
private JLabel[] day = new JLabel[42];
public MyCalendar(){
super("Calendar By XJX");
Image img=Toolkit.getDefaultToolkit().getImage("title.png");//窗口图标
setIconImage(img);
setSize(620,490);
setResizable(false);
setLayout(null);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //添加背景图片
background = new ImageIcon("background.jpg");
label = new JLabel(background);
label.setBounds(0, 0, this.getWidth(), this.getHeight());
imagePanel = (JPanel) this.getContentPane();
imagePanel.setOpaque(false);
this.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE)); //设置布局
l = new JLabel();
l.setFont(new Font("微软雅黑",Font.ITALIC,40));
l.setForeground(Color.red);//设置字体颜色
add(l);
l.setBounds(5, 5, 80, 45);
l2 = new JLabel();
l2.setFont(new Font("微软雅黑",Font.BOLD,20));
l2.setForeground(Color.red);//设置字体颜色
add(l2);
l2.setBounds(90, 10, 150, 40);
l3 = new JLabel();
l3.setFont(new Font("华文彩云",Font.BOLD,30));
l3.setForeground(Color.red);//设置字体颜色
add(l3);
l3.setBounds(500, 17, 100, 30); p = new JPanel();
add(p);
p.setBounds(5, 45, 600, 2);
p.setBorder(BorderFactory.createLineBorder(Color.black)); l4 = new JLabel("年份：");
add(l4);
l4.setBounds(10, 50, 80, 20);
l4.setFont(f);
t = new JTextField();
add(t);
t.setBounds(60, 50, 60, 20);
t.setFont(f);
l5 = new JLabel("月份：");
add(l5);
l5.setBounds(130, 50, 80, 20);
l5.setFont(f);
add(month_list);
month_list.setBounds(180, 50, 70, 20);
month_list.setFont(f);
month_list.setOpaque(false); for(int i = 0;i < 12;i++)
{
month_list.addItem(columns[i]);
}
b = new JButton("上个月");
add(b);
b.setBounds(430, 50, 80, 20);
b.setFont(f);
b.setOpaque(false);
b2 = new JButton("下个月");
add(b2);
b2.setBounds(520, 50, 80, 20);
b2.setFont(f);
b2.setOpaque(false); p2 = new JPanel();
add(p2);
p2.setBounds(15, 85, 580, 1);
p2.setBorder(BorderFactory.createLineBorder(Color.blue)); p3 = new JPanel();
p3.setOpaque(false);
add(p3);
p3.setBounds(5, 90, 600, 20);
p3.setLayout(new GridLayout(1,7,2,2));
JLabel[] week = new JLabel[7];
week[0] = new JLabel(" SUN");
week[1] = new JLabel(" MON");
week[2] = new JLabel(" TUE");
week[3] = new JLabel(" WED");
week[4] = new JLabel(" THU");
week[5] = new JLabel(" FRI");
week[6] = new JLabel(" SAT");
for(int i = 0;i < 7;i++)
{
week[i].setForeground(Color.black);//设置字体颜色
week[i].setFont(f);
p3.add(week[i]);
} datePanel = new JPanel();
datePanel.setOpaque(false);
add(datePanel);
datePanel.setBounds(5, 110, 610, 340);
datePanel.setLayout(new GridLayout(6,7,2,5)); for(int i = 0;i < 42;i++)
{
day[i] = new JLabel("");
day[i].setForeground(Color.red);//设置字体颜色
//day[i].setBorder(BorderFactory.createLineBorder(Color.black));
day[i].setFont(new Font("Jokerman",Font.BOLD,20));
datePanel.add(day[i]);
} Calendar cale = null;
cale = Calendar.getInstance();
cale.add(Calendar.MONTH, 0);
cale.set(Calendar.DAY_OF_MONTH, 1);
int dow = cale.get(Calendar.DAY_OF_WEEK);//获取本月第一天是星期几 cale = Calendar.getInstance();
cale.add(Calendar.MONTH, 1);
cale.set(Calendar.DAY_OF_MONTH, 0);
int maxDate = cale.get(Calendar.DAY_OF_MONTH);//获取本月有多少天
int ptr = 1;
int ptr2 = dow -1;
int today = now.getDate();
for(int i = 0;i < maxDate;i++)
{
day[ptr2].setText(" " + ptr);
if(ptr == today)
{
day[ptr2].setForeground(Color.black);
day[ptr2].setFont(new Font("Jokerman",Font.BOLD,35));
day[ptr2].setText(" " + ptr);
day[ptr2].setBorder(BorderFactory.createLineBorder(new Color(220,20,60)));
}
ptr++;
ptr2++;
} //初始化顶部信息
int m = now.getMonth() + 1;
l.setText("" + m);
//设置下拉列表的选中月份为当前月份
month_list.setSelectedIndex( m-1); switch (m) {
case 1:
l2.setText("January");
break;
case 2:
l2.setText("February");
break;
case 3:
l2.setText("March");
break;
case 4:
l2.setText("April");
break;
case 5:
l2.setText("May");
break;
case 6:
l2.setText("June");
break;
case 7:
l2.setText("July");
break;
case 8:
l2.setText("August");
break;
case 9:
l2.setText("September");
break;
case 10:
l2.setText("October");
break;
case 11:
l2.setText("November");
break;
case 12:
l2.setText("December");
break;
}
int y = now.getYear() + 1900;
l3.setText("" + y);
t.setText("" + y); //添加监听器
month_list.addItemListener(new ItemListener(){
public void itemStateChanged(ItemEvent e){
Calendar cale = null;
String year;
boolean flag = true;
if(e.getStateChange() == ItemEvent.SELECTED)
{
year = t.getText();
if(year.equals(""))
{
JOptionPane.showMessageDialog(null,"年份不能为空!");
}
else
{
for(int i = 0;i < year.length();i++)
{
if(year.charAt(i) >= 48 && year.charAt(i) <= 57){}
else
{
JOptionPane.showMessageDialog(null,"请按照正确格式输入年份!");
flag = false;
break;
}
} if(flag)
{
String date = "";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int y = Integer.valueOf(year).intValue();
int m = month_list.getSelectedIndex() + 1;
System.out.println(y);
System.out.println(m);
cale = Calendar.getInstance();
date = "" + year + "-" + m + "-" + 1;
try {
cale.setTime(format.parse(date));
} catch (ParseException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
int dow = cale.get(Calendar.DAY_OF_WEEK);//获取本月第一天是星期几
System.out.println(dow); cale.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
int maxDate = cale.get(Calendar.DAY_OF_MONTH);//获取本月有多少天
System.out.println(maxDate);
int ptr = 1;
int ptr2 = dow -1;
int today = now.getDate();
//再重新设置内容前重置所有内容
for(int i = 0;i < 42;i++)
{
day[i].setText("");
day[i].setForeground(Color.red);//设置字体颜色
day[i].setFont(new Font("Jokerman",Font.BOLD,20));
day[i].setBorder(null);
} for(int i = 0;i < maxDate;i++)
{
day[ptr2].setText(" " + ptr);
if(ptr == today)
{
if(y == now.getYear() + 1900 && m == now.getMonth() +1)
{
day[ptr2].setForeground(Color.black);
day[ptr2].setFont(new Font("Jokerman",Font.BOLD,35));
day[ptr2].setText(" " + ptr);
day[ptr2].setBorder(BorderFactory.createLineBorder(new Color(220,20,60)));
}
}
ptr++;
ptr2++;
} //重置l,l2,l3的信息
l.setText("" + m);
switch (m) {
case 1:
l2.setText("January");
break;
case 2:
l2.setText("February");
break;
case 3:
l2.setText("March");
break;
case 4:
l2.setText("April");
break;
case 5:
l2.setText("May");
break;
case 6:
l2.setText("June");
break;
case 7:
l2.setText("July");
break;
case 8:
l2.setText("August");
break;
case 9:
l2.setText("September");
break;
case 10:
l2.setText("October");
break;
case 11:
l2.setText("November");
break;
case 12:
l2.setText("December");
break;
}
l3.setText("" + y);
}
}
}
}
}); //上个月
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
Calendar cale = null;
String year;
boolean flag = true; year = t.getText();
if(year.equals(""))
{
JOptionPane.showMessageDialog(null,"年份不能为空!");
}
else
{
for(int i = 0;i < year.length();i++)
{
if(year.charAt(i) >= 48 && year.charAt(i) <= 57){}
else
{
JOptionPane.showMessageDialog(null,"请按照正确格式输入年份!");
flag = false;
break;
}
} if(flag)
{
String date = "";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int y = Integer.valueOf(year).intValue();
int m = month_list.getSelectedIndex();
if(m==0)
{
m = 12;//1月往前就是去年12月
y -= 1;//去年
}
System.out.println(y);
System.out.println(m);
cale = Calendar.getInstance();
date = "" + year + "-" + m + "-" + 1;
try {
cale.setTime(format.parse(date));
} catch (ParseException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
int dow = cale.get(Calendar.DAY_OF_WEEK);//获取本月第一天是星期几
System.out.println(dow); cale.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
int maxDate = cale.get(Calendar.DAY_OF_MONTH);//获取本月有多少天
System.out.println(maxDate);
int ptr = 1;
int ptr2 = dow -1;
int today = now.getDate();
//再重新设置内容前重置所有内容
for(int i = 0;i < 42;i++)
{
day[i].setText("");
day[i].setForeground(Color.red);//设置字体颜色
day[i].setFont(new Font("Jokerman",Font.BOLD,20));
day[i].setBorder(null);
} for(int i = 0;i < maxDate;i++)
{
day[ptr2].setText(" " + ptr);
if(ptr == today)
{
if(y == now.getYear() + 1900 && m == now.getMonth() +1)
{
day[ptr2].setForeground(Color.black);
day[ptr2].setFont(new Font("Jokerman",Font.BOLD,35));
day[ptr2].setText(" " + ptr);
day[ptr2].setBorder(BorderFactory.createLineBorder(new Color(220,20,60)));
}
}
ptr++;
ptr2++;
} //重置l,l2,l3的信息
t.setText("" + y);
l.setText("" + m);
//设置下拉列表的选中月份为当前月份
month_list.setSelectedIndex( m-1 );
switch (m) {
case 1:
l2.setText("January");
break;
case 2:
l2.setText("February");
break;
case 3:
l2.setText("March");
break;
case 4:
l2.setText("April");
break;
case 5:
l2.setText("May");
break;
case 6:
l2.setText("June");
break;
case 7:
l2.setText("July");
break;
case 8:
l2.setText("August");
break;
case 9:
l2.setText("September");
break;
case 10:
l2.setText("October");
break;
case 11:
l2.setText("November");
break;
case 12:
l2.setText("December");
break;
}
l3.setText("" + y);
}
}
}
}); //下个月
b2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
Calendar cale = null;
String year;
boolean flag = true; year = t.getText();
if(year.equals(""))
{
JOptionPane.showMessageDialog(null,"年份不能为空!");
}
else
{
for(int i = 0;i < year.length();i++)
{
if(year.charAt(i) >= 48 && year.charAt(i) <= 57){}
else
{
JOptionPane.showMessageDialog(null,"请按照正确格式输入年份!");
flag = false;
break;
}
} if(flag)
{
String date = "";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int y = Integer.valueOf(year).intValue();
int m = month_list.getSelectedIndex();
if(m==11)
{
m = 1;//12月往后就是明年1月
y += 1;//明年
}
else
{
m +=2;
}
System.out.println(y);
System.out.println(m);
cale = Calendar.getInstance();
date = "" + year + "-" + m + "-" + 1;
try {
cale.setTime(format.parse(date));
} catch (ParseException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
int dow = cale.get(Calendar.DAY_OF_WEEK);//获取本月第一天是星期几
System.out.println(dow); cale.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
int maxDate = cale.get(Calendar.DAY_OF_MONTH);//获取本月有多少天
System.out.println(maxDate);
int ptr = 1;
int ptr2 = dow -1;
int today = now.getDate();
//再重新设置内容前重置所有内容
for(int i = 0;i < 42;i++)
{
day[i].setText("");
day[i].setForeground(Color.red);//设置字体颜色
day[i].setFont(new Font("Jokerman",Font.BOLD,20));
day[i].setBorder(null);
} for(int i = 0;i < maxDate;i++)
{
day[ptr2].setText(" " + ptr);
if(ptr == today)
{
if(y == now.getYear() + 1900 && m == now.getMonth() +1)
{
day[ptr2].setForeground(Color.black);
day[ptr2].setFont(new Font("Jokerman",Font.BOLD,35));
day[ptr2].setText(" " + ptr);
day[ptr2].setBorder(BorderFactory.createLineBorder(new Color(220,20,60)));
}
}
ptr++;
ptr2++;
} //重置l,l2,l3的信息
t.setText("" + y);
l.setText("" + m);
//设置下拉列表的选中月份为当前月份
month_list.setSelectedIndex( m-1 );
switch (m) {
case 1:
l2.setText("January");
break;
case 2:
l2.setText("February");
break;
case 3:
l2.setText("March");
break;
case 4:
l2.setText("April");
break;
case 5:
l2.setText("May");
break;
case 6:
l2.setText("June");
break;
case 7:
l2.setText("July");
break;
case 8:
l2.setText("August");
break;
case 9:
l2.setText("September");
break;
case 10:
l2.setText("October");
break;
case 11:
l2.setText("November");
break;
case 12:
l2.setText("December");
break;
}
l3.setText("" + y);
}
}
}
}); this.addKeyListener(new KeyMonitor());
p3.addKeyListener(new KeyMonitor());
t.addKeyListener(new KeyMonitor());
imagePanel.setFocusable(true);
imagePanel.addKeyListener(new KeyMonitor());
b.addKeyListener(new KeyMonitor());
b2.addKeyListener(new KeyMonitor());
month_list.addKeyListener(new KeyMonitor());
setVisible(true);
} class KeyMonitor extends KeyAdapter{
public void keyPressed(KeyEvent e){
int key = e.getKeyCode();
if(key == KeyEvent.VK_LEFT || key == KeyEvent.VK_RIGHT)
{
Calendar cale = null;
String year;
boolean flag = true; year = t.getText();
if(year.equals(""))
{
JOptionPane.showMessageDialog(null,"年份不能为空!");
}
else
{
for(int i = 0;i < year.length();i++)
{
if(year.charAt(i) >= 48 && year.charAt(i) <= 57){}
else
{
JOptionPane.showMessageDialog(null,"请按照正确格式输入年份!");
flag = false;
break;
}
} if(flag)
{
String date = "";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int y = Integer.valueOf(year).intValue();
int m = month_list.getSelectedIndex(); if(key == KeyEvent.VK_LEFT)//前一个月
{
if(m==0)
{
m = 12;//1月往前就是去年12月
y -= 1;//去年
}
}
else if(key == KeyEvent.VK_RIGHT)//后一个月
{
if(m==11)
{
m = 1;//12月往后就是明年1月
y += 1;//明年
}
else
{
m +=2;
}
} System.out.println(y);
System.out.println(m);
cale = Calendar.getInstance();
date = "" + year + "-" + m + "-" + 1;
try {
cale.setTime(format.parse(date));
} catch (ParseException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
int dow = cale.get(Calendar.DAY_OF_WEEK);//获取本月第一天是星期几
System.out.println(dow); cale.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
int maxDate = cale.get(Calendar.DAY_OF_MONTH);//获取本月有多少天
System.out.println(maxDate);
int ptr = 1;
int ptr2 = dow -1;
int today = now.getDate();
//再重新设置内容前重置所有内容
for(int i = 0;i < 42;i++)
{
day[i].setText("");
day[i].setForeground(Color.red);//设置字体颜色
day[i].setFont(new Font("Jokerman",Font.BOLD,20));
day[i].setBorder(null);
} for(int i = 0;i < maxDate;i++)
{
day[ptr2].setText(" " + ptr);
if(ptr == today)
{
if(y == now.getYear() + 1900 && m == now.getMonth() +1)
{
day[ptr2].setForeground(Color.black);
day[ptr2].setFont(new Font("Jokerman",Font.BOLD,35));
day[ptr2].setText(" " + ptr);
day[ptr2].setBorder(BorderFactory.createLineBorder(new Color(220,20,60)));
}
}
ptr++;
ptr2++;
} //重置l,l2,l3的信息
t.setText("" + y);
l.setText("" + m);
//设置下拉列表的选中月份为当前月份
// if(key == KeyEvent.VK_LEFT)//前一个月
// {
//
// }
// else if(key == KeyEvent.VK_RIGHT)//后一个月
// {
//
// }
month_list.setSelectedIndex( m-1 );
switch (m) {
case 1:
l2.setText("January");
break;
case 2:
l2.setText("February");
break;
case 3:
l2.setText("March");
break;
case 4:
l2.setText("April");
break;
case 5:
l2.setText("May");
break;
case 6:
l2.setText("June");
break;
case 7:
l2.setText("July");
break;
case 8:
l2.setText("August");
break;
case 9:
l2.setText("September");
break;
case 10:
l2.setText("October");
break;
case 11:
l2.setText("November");
break;
case 12:
l2.setText("December");
break;
}
l3.setText("" + y);
}
}
}
}
} public static void main(String args[]){
new MyCalendar();
}
}
