1 package array;
2
3 public class ArrayDemo03 {
4 public static void main(String[] args) {
5 int[] arrays = {1,2,3,4,5,6};
6 //打印全部的数组元素
7 for (int i = 0; i < arrays.length; i++) {
8 System.out.println(arrays[i]);
9 }
10 System.out.println("===========================");
11 //计算所有元素的和
12 int sum = 0;
13 for (int i = 0; i < arrays.length; i++) {
14 sum += arrays[i];
15 }
16 System.out.println("总和sum为:" + sum);//21
17 //查找最大元素
18 int max = arrays[0];
19 for (int i = 0; i < arrays.length; i++) {
20 if(arrays[i]>max){
21 max = arrays[i];
22 }
23 }
24 System.out.println("max="+max);
25 }
26 }
1 package array;
2
3 public class ArrayDemo04 {
4 public static void main(String[] args) {
5 int[] arrays = {1,2,3,4,5,6};
6
7
8 //jdk1.5 没有下标
9 for(int array:arrays){
10 System.out.println(array);
11 }
12
13 printArray(arrays);//打印数组元素
14 System.out.println();
15 int[] reverse = reverse(arrays);
16 printArray(reverse);
17
18 }
19 //打印数组元素：
20 public static void printArray(int[] arrays){
21 for (int i = 0; i < arrays.length; i++) {
22 System.out.print(arrays[i]+ " ");
23 }
24 }
25 //反转数组：
26 public static int[] reverse(int[] arrays){
27 int[] result = new int[arrays.length];
28 //反转的操作:
29 for (int i = 0,j = arrays.length-1; i < arrays.length; i++,j--) {
30 result[j] = arrays[i];
31 }
32 return result;
33 }
34 }
