>>424 こんな感じじゃね？
Kadai051.java
class Kadai051{
public static void main(String[] args){
int[] numbers = {8,4,3,5,2};
double ave = 0;
for(int i = 0; i < numbers.length; i++){
ave += numbers[i];
}
ave = ave / numbers.length;
System.out.println(ave);
}
}
kadai052.java
class Kadai052{
public static void main(String[] args){
System.out.println(sum(24, 32));
}
private static int sum(int a, int b){
return a + b;
}
}