Java how to make jframe visible

To make a Java Swing JFrame visible, you can use the setVisible method of the JFrame class.

Here is an example of how you can make a JFrame visible:

import javax.swing.JFrame;

JFrame frame = new JFrame("My Frame");
frame.setSize(400, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);

In this example, a JFrame is created with a specified title, size, and location. The setVisible method is then called with the true argument to make the JFrame visible.

You can also use the setDefaultCloseOperation method to specify the behavior of the JFrame when the user closes it, as shown in the following example:

import javax.swing.JFrame;

JFrame frame = new JFrame("My Frame");
frame.setSize(400, 400);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);

In this example, the setDefaultCloseOperation method is used to specify that the Java application should exit when the JFrame is closed.