Esercitazione a scuola

import javax.swing.*;

public class Finestra1 {

public void creaForm1(){

JFrame finestra1=new JFrame("finestra IVL");

finestra1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

finestra1.setSize(300,300);

finestra1.setVisible(true);

}

}

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public class TestaFinestra{

public static void main(String[] args){

Finestra1 f=new Finestra1();

f.creaForm1();

}

}