方法名相同，参数类型，数量，排列顺序不同

//比大小
public class demo01 {
    public static void main(String[] args) {
        int num=(int)add(0.5,0.4);
        System.out.println(num);
    }
    public static  int add(int a,int c){
        int result =0;
            if(a==c){
                System.out.println("两个值相等");
                return 0;
            }
            if (a>c){
                result=a;}
            else {
                result=c;}
            return  result;

            }
        public static  double add(double a,double c){
        double result =0.1;
            if(a==c){
                System.out.println("两个值相等");
                return 0;
            }
            if (a>c){
                result=(int)a;}
            else {
                result=(int)c;}
            return  result;

            }
        }