JFrame – Java Swing – Example

In this tutorial, we are going to see an example of JFrame in Java Swing. JFrame is a class found in javax.swing package that inherits from java.awt.frame, it adds support for the SWING component architecture. It is a top-level window, with a border and a title bar. JFrame class has many methods that can be used to customize it.

 
 

JFrame constructors

JFrame constructors	Description
JFrame()	Create a frame that is invisible
JFrame(GraphicsConfiguration gc)	Creates a frame with a blank title and a graphic configuration.
JFrame(String title)	Create a frame with a title.
JFrame(String title, GraphicsConfiguration gc)	Create a frame with a specific graphic configuration and a specified title.

 

Example : Create a JFrame

Here is a simple example to create a JFrame.

import javax.swing.JFrame;

public class Main 
{	
	public static void main(String[] args)
	{
		JFrame frame = new JFrame();	
		frame.setVisible(true);
	}
}

Output:

 

 

Example : Change the size of a JFrame window

To resize a frame, JFrame provides a method JFrame.setSize(int width, int height), it needs two parameters width and height. Here is what the code looks like now:

JFrame frame = new JFrame();
frame.setSize(300, 300);		
frame.setVisible(true);

Output:

 

Example: Set the title of JFrame

To set the title of a JFrame, you can use JFrame.setTitle(String title).

JFrame frame = new JFrame();
frame.setSize(300, 300);    
frame.setTitle("Welecome to StackHowTo!");
frame.setVisible(true);

Output:

 

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