How to Create JFrame in Java?

JFrame is a class of the javax.swing package that is extended by java.awt.frame. This is the top-level window, with border and a title bar. JFrame class has various methods which can be used to customize it. So, this article will help you get in-depth knowledge about JFrame in Java.

These are the topics to be covered in this article:

• Introduction to Java JFrames
• How to create a JFrame?
• Operations

Let’s begin!

JFrame in Java: Introduction to Java JFrames

JFrame is a top-level container that provides a window on the screen. A frame is actually a base window on which other components rely, namely the menu bar, panels, labels, text fields, buttons, etc. Almost every other Swing application starts with the JFrame window. Unlike a frame, JFrame has the option to hide or close the window with the help of the method setDefaultCloseOperation(int).

How to create a JFrame?

JFrame class has many constructors that are used to create a new JFrame. You can create a JFrame using these methods:

JFrame(): This helps in creating a frame which is invisible.
JFrame(String Title): Helps in creating a frame with a title.
JFrame(GraphicsConfiguration gc): Creates a frame with blank title and the graphics configuration of screen.

Example:

JFrame F = new JFrame();
// Or overload the constructor and give it a title:
JFrame F1 = new JFrame("Red Alert!");

Now, after creating the JFrame, you need to set the size and the location. Let’s see how this can be done.

//add the frame
JFrame f = new JFrame("Red Alert!");
//set size: width, height (in pixels)
f.setSize(450, 475);
//set the location (x,y)
f.setLocation(120, 60);

Now let’s move ahead and understand the operations that can be performed on the JFrame.

JFrame in Java: Operations

Example:

import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Jpanel;
public class JFrame Edureka{
public static void main(String s[]) {
JFrame frame = new JFrame("JFrame Example");
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
JLabel label = new JLabel("JFrame By Example");
JButton button = new JButton();
button.setText("Button");
panel.add(label);
panel.add(button);
frame.add(panel);
frame.setSize(200, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

Output:

With this, we come to the end of this article on “JFrame in Java“. I hope you guys are clear with everything that has been shared with you.

I hope the above-mentioned content proved to be helpful in enhancing your Java knowledge. Keep reading, keep exploring!

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