Java Arrays' Pass-By-Value Example

public class MainClass {
    public static void main(String[] args){

        String[] names1 = mkArr("Hero1", "Hero2", "Hero3");
        String[] names2 = mkArr("Villain1", "Villain2", "Villain3");

        //Prints Heroes first, then the villains
        pArr(names1);
        pArr(names2);

        //If it were pass-by-ref - then this would print
        // villains first, then heroes, yet it doesn't
        swapArr(names1,names2);
        pArr(names1);
        pArr(names2);
    }

    static void swapArr(Object[] a1, Object[] a2){
        Object[] t = a1;
        a1 = a2;
        a2 = t;

        System.out.println("[START]Dbg swapArr res:");
        pArr(a1); //villains
        pArr(a2); //heroes
        System.out.println("[END] Dbg swapArr res:");
    }

    static <T> void pArr(T[] a){
        System.out.print('{');
        for(T t : a){
            System.out.print(t.toString()+",");
        }
        System.out.println('}');
    }

    static <T> T[] mkArr(T... elements){
        return elements;
    }
}