Good feedback by user27517. I want to add one thing, which is to use SwingUtilities.invokeLater() in the main method:

public static void main(String[] args) 
{
    SwingUtilities.invokeLater(new Runnable() 
    {
        public void run() 
        {
            new Calculator();
        }
    });
}

Why it's needed

Good feedback by user27517. I want to add one thing, which is to use SwingUtilities.invokeLater() in the main method:

public static void main(String[] args) 
{
    SwingUtilities.invokeLater(new Runnable() 
    {
        public void run() 
        {
            new Calculator();
        }
    });
}

Why it's needed

A good feedback by user27517. I want to add one thing that is, use SwingUtilities.invokeLater() in main method.

public static void main(String[] args) 
{
    SwingUtilities.invokeLater(new Runnable() 
    {
        public void run() 
        {
            new Calculator();
        }
    });
}

WHY?

Good feedback by user27517. I want to add one thing, which is to use SwingUtilities.invokeLater() in the main method:

public static void main(String[] args) 
{
    SwingUtilities.invokeLater(new Runnable() 
    {
        public void run() 
        {
            new Calculator();
        }
    });
}

Why it's needed