public class average_array {

 public static void main(String[] args) {
 
 int array[] = {16, 5, 13, 54, 17, 2, 38, 42, 67}; 
 
 for (int number:array)
 System.out.print(number+" "); 
 
 int 합계 = 0; 
 for(int i = 0; i < array.length; i++){
 합계 += 배열[i]; 
 }
 평균 float = (float) 합계 /array.length; 
 
 System.out.print("\n평균 = "+평균); 
 }
}

16 5 13 54 17 2 38 42 67 
평균=28.222221

Java 8

public void moyenne_tableau_java8 () {
 OptionalDouble mean = Arrays.stream(TabNumbers).average(); 
}

public static float moyenne_tableau_guava (int array[]) {
 float average = (float) DoubleMath.mean(array); 
 반환 평균; 
}

public static float moyenne_tableau_apache_commons (int array[]) {
 Mean mean = new Mean(); 
 float 평균 = mean.evaluate(array); 
 반환 평균; 
}