kart/src/ui/Karten.java

package ui;

import javax.swing.SwingUtilities;

public class Karten {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                MainWindow main = new MainWindow();
                main.show();
            }
        });
    }
}