I've this class, Gestisci.java, when I initialize this class from
Crea.java class I need to pass an argument to the constructor so code
in class Crea.java will be something like that:
new Gestisci(myStringVariable).setVisible(true)

=======================================
//File: Gestisci.java
public class Gestisci extends javax.swing.JFrame {

   private String tipo;               // declare tipo

   public Gestisci(String t) {      // accept string
       this.tipo = t;                     // "bind"
   }
// START A METHOD
System.out.println(tipo);
// END METHOD

   public static void main(String args[]) {
       java.awt.EventQueue.invokeLater(new Runnable() {
           public void run() {
               new Gestisci(???).setVisible(true);  // AND HERE???
           }
       });
   }

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Now my knowledge stop here, but, what I've to put in main at place of
'???' to correctly compile?