import javax.swing.*; import java.awt.*; public class MainFormes{ public static void main(String[] args){ JFrame frame = new JFrame("Formes"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Formes truc = new Formes(); frame.add(truc); frame.setSize(500,500); frame.setLocation(500,250); frame.setVisible(true); } }