求整型数组的和遍历数组，返回和

求整型数组的和 // 遍历数组，返回和

public class Test{ public static void main(String[] args){ int[] arr = {1,2,3,4,5,6,7,8,9}; Sum mySum = new Sum(); //mySum.sum = 0; int answer = mySum.integerSum(arr); System.out.println("数组的和为"+answer); } } class Sum{ public int integerSum(int[] arr1){ int sum = 0; for (int i=0;i<arr1.length ;i++ ){ sum += arr1[i]; } return sum; } }