Java tutorial
import java.util.ArrayList; public class Test { public static void main(String[] args) { ArrayList<Integer> a1 = new ArrayList<>(); a1.add(new Integer(1)); a1.add(2); ArrayList<Float> a2 = new ArrayList<>(); a2.add(new Float(3.0)); a2.add(new Float(4.0)); displayElements(a1, a2, 12); } @SafeVarargs public static <T> void displayElements(T... array) { for (T element : array) { System.out.println(element.getClass().getName() + ": " + element); } } }