使用JAVA編程萬年歷要求：使用圖形用戶界面；實現日期與星期的查詢。

這是我剛做出來的，時間緊迫，做得有些粗糙，但是妳要的功能基本實現了！import java.awt.*;

import java.text.*;

import javax.swing.*;

import java.awt.event.*;

import java.util.*;

//import java.util.Timer;

public class DataSimple implements ItemListener

{

JFrame mainFrame;

JLabel yearLabel,monthLabel,showTextLabel,timeLabel;

JTextArea showArea;

JComboBox yearBox,monthBox;

JPanel panel_top,panel_down;

Container con;

//JTable myTable;

//JScrollPane JSpane;

String year[]=new String[9000];

String month[]=new String[12];

Date today;

GregorianCalendar cal;

//Timer myTimer;

//TimerTask myTask;

int totalDays,startDay,i;

String selectYear,selectMonth;

Object [][] day=new Object[4][6];

static final String head[]={"星期日","星期壹","星期二","星期三","星期四","星期五","星期六"};

SimpleDateFormat timeFormat=new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");

public DataSimple()

{

mainFrame=new JFrame("模擬萬年日歷");

con=mainFrame.getContentPane();

yearLabel=new JLabel("選擇年份:");

monthLabel=new JLabel("選擇月份:");

for(int i=1900;i<10000;i++)

{

try

{

//year[i-1900]=(new Integer(i)).toString();

year[i-1900]=String.valueOf(i);

}

catch(Exception e)

{

JOptionPane.showMessageDialog(mainFrame,"出現異常");

}

}

yearBox=new JComboBox(year);

yearBox.setSelectedItem("2010");

yearBox.addItemListener(this);

for(int i=0;i<12;i++)

{

month[i]=(new Integer(i)).toString();

}

monthBox=new JComboBox(month);

monthBox.setSelectedItem("1");

monthBox.addItemListener(this);

panel_top=new JPanel();

panel_top.setLayout(new FlowLayout());

panel_top.add(yearLabel);

panel_top.add(yearBox);

panel_top.add(monthLabel);

panel_top.add(monthBox);

con.add(panel_top,BorderLayout.NORTH);

showArea=new JTextArea();

showArea.setEditable(false);

showDate(2010,1);

//myTable=new JTable(day,head);

con.add(showArea,BorderLayout.CENTER);

showTextLabel=new JLabel("現在時間是：");

today=new Date();

timeLabel=new JLabel(timeFormat.format(today));

panel_down=new JPanel();

panel_down.setLayout(new FlowLayout());

panel_down.add(showTextLabel);

panel_down.add(timeLabel);

con.add(panel_down,BorderLayout.SOUTH);

//con.add(showArea,BorderLayout.CENTER);

mainFrame.setSize(400,300);

mainFrame.setVisible(true);

mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void showDate(int year,int month)

{

showArea.setText("");

cal=new GregorianCalendar(year,month-1,1);

totalDays=cal.getActualMaximum(Calendar.DAY_OF_MONTH);

startDay=cal.get(Calendar.DAY_OF_WEEK)-1;

for(i=0;i<head.length;i++)

showArea.append(head[i]+" ");

showArea.append("\n");

//輸出第壹天之前的空格，每個輸出項8個空格

for(i=0;i<startDay;i++)

{

//day[0][i]=new Integer(0);

showArea.append(" ");

}

//依次輸出每壹天，每壹個輸出項占8個字符寬度

for(int days=1;days<=totalDays;days++)

{ /*for(int j=0;j<5;j++)

{

for(int z=0;z<7;z++)

{

if(!day[j][z].equals(0))

{

day[j][z]=new Integer(days);

}*/

if(days<10)

{

showArea.append(" "+days+" ");

}

else if(days>=10)

{

showArea.append(" "+days+" ");

}

i++;

if(i==7)

{

showArea.append("\n");

i=0;

}

/*}

}*/

}

}

public void itemStateChanged(ItemEvent e)

{

if(e.getStateChange()==ItemEvent.SELECTED)

{

selectYear=(String)(yearBox.getSelectedItem());

selectMonth=(String)(monthBox.getSelectedItem());

showDate(Integer.parseInt(selectYear),Integer.parseInt(selectMonth));

}

}

public static void main(String argv[])

{

new DataSimple();

}

}運行截圖：

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