java中方法的使用 重载-0512

class Demo02 
{
    public static void main(String[] args) 
    {
        System.out.println(add(1,2));
        System.out.println(add(1,2,8));
        System.out.println(add(1.1,2.2));
    }
    public static int add(int a,int b){
           return a+b;
    }
    public static int add(int a,int b,int c){
           return a+b+c;
    }
    public static double add(double a,double b){
           return a+b;
    }
}