函数的重载overload

举例如下

public class Test
{
    public static void main(String[] args)
    {
        int isum;
        double dsum;
        isum = add(3,5);
        System.out.println("第一个isum="+isum);
        isum = add(3,4,5);
        System.out.println("第二个isum="+isum);
        dsum = add(2.3,3.5);
        System.out.println("第三个isum="+dsum);
       }

    public static int add(int x,int y)
    {
        return x+y;
    }
   
    public static int add(int x,int y,int z)
    {
        return x+y+z;
    }
   
    public static double add(double x,double y)
    {
        return x+y;
    }
}

这样的例子还有很多，编程不要死记硬背，要变通，触类旁通

转载于:https://www.cnblogs.com/xiaofan21/archive/2013/04/09/3009537.html