Creating Simple Window in Java: using swings

This Java video tutorial demonstrates the creation of a simple window by importing Swings package and extending JFrame class.

import javax.swing.*;

javax.swing provides a set of lightweight components that, to the maximum degree possible, works the same on all platforms.

myWindow Class

class myWindow extends JFrame
{

}

myWindow is user the name given to the defined class. extends is the keyword. JFrame is a built-in class of swing package.

Constructor

 myWindow()
 { 
  setTitle("My window program, using Swings");
  setSize(400, 200);
  setVisible( true );
  setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
 }

myWindow() is the constructor, and thus it’s name matches with that of its class name.
setTitle() : To set the string present on the title bar of the window we are creating.
setSize() : To set the size of the window. It takes two parameters, width and height of the window.
setVisible() : It’s very important for all the programs which involves visual components. passing a value of true makes the window visible.

Main method

 public static void main(String args[])
 {
   // new myWindow();
  myWindow m1 = new myWindow();
 }

main method just calls the constructor. We can simply write new myWindow() since we are not at all taking the help of any object here.

Video Tutorial: Creating Simple Window in Java: using swings

Full Source code to create a simple window in Java: using swings

import javax.swing.*;

class myWindow extends JFrame
{
 myWindow()
 {
  setTitle("My window program, using Swings");
  setSize(400, 200);
  setVisible( true );
  setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
 }
 
 public static void main(String args[])
 {
   // new myWindow();
  myWindow m1 = new myWindow();
 }
}

Output: