package com.good;public class helloworld { public static void main(String[] args) { ? ? int a=15; int b=24; int sum=a+b; System.out.println("兩數(shù)之和為："+sum); } }package com.good;public class helloworld { public static void main(String[] args) { ? ? int a=15; int b=24; int sum=a+b; System.out.println("兩數(shù)之和為："+sum); } }