자바를 이용한 Swing 달력만들기

SwingCalendar.exe

SwingCalendar.java

package cal;

import java.io.*;
import java.util.Calendar;
import java.util.StringTokenizer;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingCalendar implements ActionListener
{
 Calendar cal;
 int int_Year, int_Month;
 String year, month;
 StringBuffer sb_Print;

 JLabel lb_title, lb_YearSpace, lb_MonthSpace;
 JTextField textField_Year, textField_Month;
 JTextPane textPane;
 JPanel panel_North, panel_NorthFloor;
 JButton bt_Input;

 public SwingCalendar()
 {
  cal = Calendar.getInstance();
  setCalFrame();
 }

 public void setCalendar()
 {  
  sb_Print = new StringBuffer();
        sb_Print.append("     일    월    화    수    목    금    토\n");

  cal.set(int_Year, int_Month-1, 1);
  int cal_Field = cal.get(7);
  for(int j = 1; j < cal_Field; j++)
  {
   sb_Print.append("        ");
  }

  int cal_Gam = cal.getActualMaximum(5);

  int comp = 1;
  for(int k = cal_Field; comp <= cal_Gam; k++)
  {
   if (comp >= cal_Gam)
   {
    if (comp < 10)
    {
     sb_Print.append("     ");
    }else sb_Print.append("    ");
    
    sb_Print.append(comp);
    textPane.setText(sb_Print.toString());
   }else
   {
    if (comp < 10)
    {
     sb_Print.append("      ");
    }else sb_Print.append("    ");
    
    sb_Print.append(comp);
    textPane.setText(sb_Print.toString());
   }
   
   if(k % 7 == 0) sb_Print.append("\n");
   comp++;
  }
 }

 public void setCalFrame()
 {
  lb_title = new JLabel("연도와 달을 입력하세요 -> ex) xxxx xx", SwingConstants.CENTER);
  lb_YearSpace = new JLabel("년 ");
  lb_MonthSpace = new JLabel("월 ");
  textField_Year = new JTextField(5);
  textField_Month = new JTextField(3);
  textPane = new JTextPane();
  panel_North = new JPanel(new GridLayout(2,1));
  panel_NorthFloor = new JPanel();
  bt_Input = new JButton("입력");

  try {
   UIManager.setLookAndFeel(
    UIManager.getCrossPlatformLookAndFeelClassName());
  } catch (Exception e) { }

  JFrame.setDefaultLookAndFeelDecorated(true);
  JFrame frame = new JFrame(" Swing Calendar");

  frame.add(panel_North, "North");
  panel_North.add(lb_title);
  panel_North.add(panel_NorthFloor);
  panel_NorthFloor.add(textField_Year);
  panel_NorthFloor.add(lb_YearSpace);
  panel_NorthFloor.add(textField_Month);
  panel_NorthFloor.add(lb_MonthSpace);
  panel_NorthFloor.add(bt_Input);

  frame.add(textPane, "Center");
  textPane.setEditable(false);
  textPane.setFont(new Font("font", Font.BOLD, 16));
  textPane.setForeground(Color.blue);

  bt_Input.addActionListener(this);

  frame.setSize(260,280);
  frame.setLocation(300,300);
  frame.setVisible(true);
  frame.setResizable(false);
  frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
 }

 public void actionPerformed(ActionEvent e)
 {
  Object obj = e.getSource();
  if (obj == bt_Input)
  {  
   year = textField_Year.getText();
   month = textField_Month.getText();
   try
   {
    int_Year = Integer.parseInt(year);
    int_Month = Integer.parseInt(month);
    
    if(year.length() != 4 || month.length() != 2)
    {
     textPane.setText("년도 및 월 입력이 잘못되었습니다.");
     return;
    }else if ((int_Month == 0) || (12 < int_Month))
    {
     textPane.setText("년도 및 월 입력이 잘못되었습니다.");
     return;
    }else setCalendar();
   }
   catch (NumberFormatException ne)
   {
    textPane.setText("입력된 년도와 월이 숫자형태가 아닙니다.");
    return;
   }
  }
 }

 public static void main(String[] args)
 {
  new SwingCalendar();
 }
}