How to set current day (today) background color in Calendar?

[Marcin]

I dont know how to set colour current day's button in Calendar.

      
      if (x==today) {
          button[x].setBackground(Color.blue);
      }

The code above doesnt work correct. I browsed many webites but dont find any what would help.

Full code of the class:

package lars;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class DatePicker {
 
    Calendar cal = Calendar.getInstance();
    
    int month = cal.get(Calendar.MONTH);
  int year = cal.get(Calendar.YEAR);;
 int today = cal.get(Calendar.DAY_OF_MONTH);
  JLabel l = new JLabel("", JLabel.CENTER);
  String day = "";
  JDialog d;
  JButton[] button = new JButton[49];

  public DatePicker(JFrame parent) {
    d = new JDialog();
    d.setModal(true);
    String[] header = { "Sun", "Mon", "Tue", "Wed", "Thur", "Fri", "Sat" };
    JPanel p1 = new JPanel(new GridLayout(7, 7));
    p1.setPreferredSize(new Dimension(430, 120));

    for (int x = 0; x < button.length; x++) {
      final int selection = x;
      button[x] = new JButton();
      button[x].setFocusPainted(false);
      button[x].setBackground(Color.white);
      
      
      
      if (x==today) {
          button[x].setBackground(Color.blue);
      }
      
      
      
      
      
      
      
      
      
      
      if (x > 6) {
        button[x].addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent ae) {
            day = button[selection].getActionCommand();
            d.dispose();
          }
        });
      }
      if (x < 7) {
        button[x].setText(header[x]);
        button[x].setForeground(Color.red);
      }
      p1.add(button[x]);
    }
    JPanel p2 = new JPanel(new GridLayout(1, 3));
    
    // Previous month button
    JButton previous = new JButton("<< Previous");
    previous.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        month--;
        displayDate();
      }
    });
    p2.add(previous);
    
    // Current month label between the previous and next buttons
    p2.add(l);
    
    // Next month button
    JButton next = new JButton("Next >>");
    next.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        month++;
        displayDate();
      }
    });
    p2.add(next);
    
    d.add(p1, BorderLayout.CENTER);
    d.add(p2, BorderLayout.SOUTH);
    d.pack();
    d.setLocationRelativeTo(parent);
    displayDate();
    d.setVisible(true);
  }

  public void displayDate() {
    for (int x = 7; x < button.length; x++) {
      button[x].setText("");
    }
	
    java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("MMMM yyyy");
    java.util.Calendar cal = java.util.Calendar.getInstance();
    cal.set(year, month, 1);
    int dayOfWeek = cal.get(java.util.Calendar.DAY_OF_WEEK);
    int daysInMonth = cal.getActualMaximum(java.util.Calendar.DAY_OF_MONTH);

    for (int x = 6 + dayOfWeek, day = 1; day <= daysInMonth; x++, day++) {
      button[x].setText("" + day);
    }
  
    l.setText(sdf.format(cal.getTime()));
    d.setTitle("Date Picker");
  }

  public String setPickedDate() {
    if (day.equals("")) {
      return day;
    }
  
    // Set the return date format
    java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("dd-MM-yyyy");
		
    java.util.Calendar cal = java.util.Calendar.getInstance();
    cal.set(year, month, Integer.parseInt(day));
    return sdf.format(cal.getTime());
  }
}

Thx for any advise.

[Norm]

Can you make a SSCCE that compiles and shows the problem.
Your posted code has no main.

[Marcin]

There is no problem about it, cause program starts and everything is ok, expect for current day button is not blue higlighted. Other button is blue.

This Calendar program has two .java files: main and class . The main code.

package  lars;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Lars{
  public static void main(String[] args) {
    JLabel label = new JLabel("Selected Date:");
    final JTextField text = new JTextField(20);
    JButton b = new JButton("popup");
    JPanel p = new JPanel();
    p.add(label);
    p.add(text);
    p.add(b);
    final JFrame f = new JFrame();
    f.getContentPane().add(p);
    f.pack();
    f.setVisible(true);
    b.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        text.setText(new DatePicker(f).setPickedDate());
      }
    });
  }
}

[Norm]

Put this in the action listener method:

            System.out.println("selection=" + selection);

and look at what it prints out when you click on the first day (the blue one)

[Marcin]

then it shows 11, but i know that this code => if (x==today) is wrong cause it counts every button and compare that number with current date of month . The problem is that i dont know how to write that it shows blue today button on the calendar.

[Norm]

Which button is showing blue? What is its index?

Try hardcoding a number as index to the button array to set a button blue.
button[<Test differentNbrshere>].setBackground(Color.blue);

See what button is set blue. Compare which button is set blue with the date.
x==today is not the test to determine which button to set.

[Marcin]

ok thx i will try to do this