Questão de Tecnologia da Informação

package untitled2; public class myClass1 { private static myClass1 instance; private myClass1() {System.out.println("classe construida");} public static synchronized myClass1 getInstance() { if (instance ==null) instance = new myClass1(); return instance; } } package untitled2; public class Pincipal { public static void main(String[] args) { myClass1 mc1 = myClass1.getInstance(); myClass1 mc2 = myClass1.getInstance(); myClass1 mc3 = myClass1.getInstance(); myClass1 mc4 = myClass1.getInstance(); } }