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
[youtube https://www.youtube.com/watch?v=7ThtNST8gKE]
Full Source code to create a simple window in Java: using swings
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | 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: