1.请看以下代码，你发现了有什么特殊之处吗？

//MethodOverload.java
//Using overloaded methods

public class MethodOverload {

    public static void main(String[] args) 
    {
        System.out.println("The square of integer 7 is " + square(7));
        System.out.println("\nThe square of double 7.5 is " + square(7.5));
    }

    public static int square(int x) 
    {
        return x * x;
    }

    public static double square(double y) 
    {
        return y * y;
    }
}