Basic Calendar

[Paula Vasseur]

Hey does anyone know of a good calendar servlet or jsp, I need to be able to click on each date, it register this date and then take me to a corresponding link. It also needs to be able to go up and down in months.
Have been looking but most of the calendars are for inputting data and events, i just want a basic one that I can click on.
Thanks for your help
Paula xxx

[Michael Dunn]

Try this - it's a swing app, so I'm not sure if it's what you're after, but there might be something in it for you.

import java.util.*;
import java.text.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class DatePicker extends JFrame implements ActionListener
{
  private static JButton btns[] = new JButton[49];
  private static JButton btnNext = new JButton("Forward 1 Month >>>");
  private static JButton btnLast = new JButton("<<< Back 1 Month");
  private static JLabel lblMth = new JLabel();
  private static JLabel lblYr = new JLabel();
  private static Calendar cal = Calendar.getInstance();
  private static String months[] = {"January","February","March","April",
  "May","June","July","August","September","October","November","December"};
  private static int mth = 0;
  private static int yr = 0;
  SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy");
  public DatePicker()
  {
    super("Date Picker");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
    Container frame = getContentPane();
    frame.setLayout(new BorderLayout());
    setSize(400,500);
    mth = cal.get(cal.MONTH);
    yr = cal.get(cal.YEAR);
    JPanel top = new JPanel(new FlowLayout());
    top.add(lblMth);
    top.add(lblYr);
    JPanel mid = new JPanel(new GridLayout(7,7));
    String days[] = {"S","M","Tu","W","Th","F","S"};
    for(int i = 0; i < btns.length; i++)
    {
      btns[i] = new JButton();
      btns[i].setFont(new Font("Arial",Font.BOLD, 12));
      btns[i].setPreferredSize(new Dimension(50,50));
      if(i < 7)
      {
        btns[i].setText(days[i]);
      }
      else
      {
        btns[i].addActionListener(this);
        btns[i].setFont(new Font("Arial",Font.BOLD, 12));
      }
      mid.add(btns[i]);
    }
    btnNext.addActionListener(this);
    btnLast.addActionListener(this);
    JPanel bottom = new JPanel(new FlowLayout());
    bottom.add(btnLast);
    bottom.add(btnNext);
    frame.add(top,BorderLayout.NORTH);
    frame.add(mid,BorderLayout.CENTER);
    frame.add(bottom,BorderLayout.SOUTH);
    setDates();
    pack();
    setContentPane(frame);
  }
  private static void setDates()
  {
    for(int i = 7; i < btns.length; i++)
    {
      btns[i].setText("");
    }
    cal.set(yr,mth,1);
    lblMth.setText(months[cal.get(cal.MONTH)]);
    lblYr.setText(String.valueOf(cal.get(cal.YEAR)));
    int firstDay = cal.get(cal.DAY_OF_WEEK)-1+7;
    int ii = 1;
    for(int i = firstDay; i<firstDay+31; i++)
    {
      btns[i].setText(String.valueOf(ii));
      ii++;
      cal.add(cal.DATE,1);
      if(cal.get(cal.MONTH) != (1200 + mth)%12) break;
    }
  }
  public void actionPerformed(ActionEvent ae)
  {
    if(ae.getSource() == btnLast)
    {
      mth--;
      setDates();
    }
    else if(ae.getSource() == btnNext)
    {
      mth++;
      setDates();
    }
    else
    {
      for(int i = 7; i < btns.length; i++)
      {
        if(ae.getSource() == btns[i])
        {
          if(!btns[i].getText().equals(""))
          {
            Calendar cal2 = Calendar.getInstance();
            cal2.set(yr,mth,Integer.parseInt(btns[i].getText()));
            JOptionPane.showMessageDialog(null,"You selected " +
              sdf.format(cal2.getTime()));
          }
          break;
        }
      }
    }
  }
  public static void main(String args[])
  {
    DatePicker dp = new DatePicker();
  }
}

[Kevin Ng]

Hi, does anyone help me in solving this problem regarding Calendar? The below codes are runnable and function one the problem is when i put the code in my program the displayed Month got problem.
My program main page has few buttons and each of them represent a module where user click on 1 of the button a particular JFrame will appear. So my idea is when i click on the button on main page a JFrame Calendar will appear. Actually in first time the calendar function so well but the second, third and following click on the button, the Month will automatically jump/increase into 1 month without clicking on the next button...
I hope you all can solve my problem and i am very appriciate with your helping hand. THANK YOU SO MUCH!
(You all can try on develop a mainpage with a button where user click on it and call this Calendar)

import java.util.*;
import java.text.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
public class Scheduler extends JFrame implements ActionListener 
{
  private static JButton btns[] = new JButton[49];
  private static JButton btnNext = new JButton("Forward 1 Month >>>");
  private static JButton btnLast = new JButton("<<< Back 1 Month");
  private static JLabel lblMth = new JLabel();
  private static JLabel lblYr = new JLabel();
  private static Calendar cal = Calendar.getInstance();
  private static String months[] = {
      "January", "February", "March", "April",
      "May", "June", "July", "August", "September", "October", "November",
      "December"};
  private static int mth = 0;
  private static int yr = 0;
  SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy");
  public Scheduler() 
  {
    super("Date Picker");
    //setDefaultCloseOperation(Scheduler.EXIT_ON_CLOSE);
    Container frame = getContentPane();
    frame.setLayout(new BorderLayout());
    
    mth = cal.get(cal.MONTH);
    yr = cal.get(cal.YEAR);
    JPanel top = new JPanel(new FlowLayout());
    top.add(lblMth);
    top.add(lblYr);
    JPanel mid = new JPanel(new GridLayout(7, 7));
    String days[] = {
        "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
    for (int i = 0; i < btns.length; i++) 
    {
      btns[i] = new JButton();
      btns[i].setFont(new Font("Arial", Font.BOLD, 12));
      btns[i].setPreferredSize(new Dimension(50, 50));
      if (i < 7)
      {
        btns[i].setText(days[i]);
      }
      else 
      {
        btns[i].addActionListener(this);
        btns[i].setFont(new Font("Arial", Font.BOLD, 12));
      }
      mid.add(btns[i]);
    }
    btnNext.addActionListener(this);
    btnLast.addActionListener(this);
    JPanel bottom = new JPanel(new FlowLayout());
    bottom.add(btnLast);
    bottom.add(btnNext);
    frame.add(top, BorderLayout.NORTH);
    frame.add(mid, BorderLayout.CENTER);
    frame.add(bottom, BorderLayout.SOUTH);
    setDates();
    pack();
    setContentPane(frame);
    
    //setVisible(true);
    setSize(800, 440);
    show();
  }
  
  private static void setDates() 
  {
    for (int i = 7; i < btns.length; i++) 
    {
      btns[i].setText("");
    }
    cal.set(yr, mth, 1);
    lblMth.setText(months[cal.get(cal.MONTH)]);
    lblYr.setText(String.valueOf(cal.get(cal.YEAR)));
    int firstDay = cal.get(cal.DAY_OF_WEEK) - 1 + 7;
    int ii = 1;
    for (int i = firstDay; i < firstDay + 31; i++) 
    {
      btns[i].setText(String.valueOf(ii));
      ii++;
      cal.add(cal.DATE, 1);
      if (cal.get(cal.MONTH) != (1200 + mth) % 12)
        break;
    }
  }
  
  public void actionPerformed(ActionEvent ae) 
  {
    if (ae.getSource() == btnLast) 
    {
      mth--;
      setDates();
    }
    else if (ae.getSource() == btnNext) 
    {
      mth++;
      setDates();
    }
    else 
    {
      for (int i = 7; i < btns.length; i++) 
      {
        if (ae.getSource() == btns[i]) 
        {
          if (!btns[i].getText().equals("")) 
          {
            Calendar cal2 = Calendar.getInstance();
            cal2.set(yr, mth, Integer.parseInt(btns[i].getText()));
            JOptionPane.showMessageDialog(null, "You selected " +
                                          sdf.format(cal2.getTime()));
          }
          break;
        }
      }
    }
  }
}

[ edited to format code and to preserve formatting using the [code] and [/code] UBB tags -ds ]
[ August 31, 2003: Message edited by: Dirk Schreckmann ]

[Dirk Schreckmann]

Welcome to JavaRanch, Kevin Ng!
You should start a new thread over in the Swing / JFC / AWT forum for your question.

[Michael Dunn]

Not sure if this is your problem, but months are 0-based.
So, if you want September - you have to use 8, January - 0, December - 11 etc

[Kevin Ng]

First of all thank you all of you who replied to me. Actually i had solved my problem after that. The problem is just removes all the static for every declarations. Only type private Jbutton not private static JButton.
[ September 01, 2003: Message edited by: Kevin Ng ]