Hi everyone ! Please I don't know why this line is not working in my code :

Question

JFrame jf = new JFrame()

Answer 1

Did you imported library ?
not working means how behaving?

Answer 2

Yes, of course !👇

import javax.swing.JFrame;

Answer 3

import javax.swing.JFrame;

public class Program
{
public static void main(String[] args) {
JFrame jf = new JFrame();
jf.setTitle("Animation");
jf.setSize(20,20);
jf.setLocationRelativeTo(null);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
}
}

Answer 4

Increase size
jf.setSize(200, 300);

Add something to frame.
JLabel l = new JLabel("New Label");
jf.add(l);

try to add a panel
and now see...