Run GUI Forms from IntelliJ IDEA

There are main 3 steps.

Following are the steps which I make for the ease of implementation.

Step 1: Update 'field name' property with a variable name. (eg: mainPanel)

Step 2: Create the constructor to set the panel, while extending the class to JFrame class

public class MyClass extends JFrame{

   //following component variables are automatically created
   private JPanel mainPanel;

   public MyClass(){
      setContentPane(mainPanel);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pack();
   }
}

Step 3: Create the main method to make the frame visible

public static void main() {
   new MyClass().setVisible(true);  
}