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+====== Cómo crear y generar números aleatorios ======
+[[http://java.sun.com/javase/6/docs/api/java/util/Random.html]]
+<code java>
+import java.util.Random;
+Random rnd = new Random();
+rnd.nextInt( 5 );  // devuelve un número entero aleatorio entre 0 y 4
+rnd.nextLong(); // retorna un entero largo
+</code>