成员变量和局部变量

 1 package test.com.sen.debug;
 2 
 3 public class test {
 4     public static void main(String[] args){
 5         double a = 5.1;
 6         double b = 20.32;
 7         double c = 32.921;
 8         System.out.println(findAvg(a,b,c));
 9     }
10     //findAvg方法一定要以static double类型返回，不然代码报错，作为成员变量的类变量
11     static double findAvg(double a, double b, double c) {
12         return (a+b+c)/3.0;
13     }
14 }