package com.myfirst;public class Helloworld { public static void main(String[] args){? ? ? ? ?Helloworld hello=new Helloworld();? ? ? ? ?double avg=hello.clacAvg;? ? ? ? ?System.out.println("平均成績為："+avg); } public double clacAvg(){ double java=92.5; double php=83.0; double avg=(java+php)/2; return avg; }}