Overload.java

public class Overload{

    public static void foo(int x){
        System.out.println("int");
    }

    public static void foo(double x){
        System.out.println("double");
    }

    public static void foo(int... x){
        System.out.println("int...");
    }

    public static void foo(double... x){
        System.out.println("double...");
    }

    public static void main(String[] args) {
        int i =1;
        int j =127;

        foo(i); // "int"
        foo(i, j); // ambiguous on JDK6
    }

}