public class Demo05 { public static void main(String[] args) { //定义一个数组1,2,3,4,5,6,7,8,9,10 int[] arr = {1,2,3,4,5}; for (int i = 0; i < arr.length; i++) { if(arr[i]%2==0){ arr[i]=arr[i]/2; }else{ arr[i]=arr[i]*2; } } for (int i = 0; i < arr.length; i++) { System.out.println(arr[i]); } } }