作业：复制数组

题目：

复制数组int[] arr={1,2,3,4,5}; int[] arr1={6,7,8,9,10}; int[] arrcopy={1,2,3,9,10} 也有可能 {6,2,3,4,10}。

代码：

//复制数组：
package java02;
import java.util.Random;
public class copyArray {public static void main(String[] args) {int[] arr1 = {1, 2, 3, 4, 5};int[] arr2 = {6, 7, 8, 9, 10};int[] arr3 = new int[arr1.length + arr2.length];//将两个数组（arr1和arr2）拼接成一个新的数组（arr3）：for(int i = 0; i < arr1.length; i++) {arr3[i] =arr1[i];}for(int i = 0; i < arr2.length; i++) {arr3[arr1.length + i] = arr2[i];}//多打乱几次 arr3 数组：for(int i = 0; i < arr3.length; i++) {arr3 = disturbArray(arr3);}//得到需要复制的数组：int[] arrCopy = new int[arr1.length];for(int i = 0; i < arrCopy.length; i++) {arrCopy[i] = arr3[i];}//打印复制出来的数组 arrCopy 元素：System.out.print("{");for(int i = 0; i < arrCopy.length - 1; i++) {System.out.print(arrCopy[i] + ", ");}System.out.print(arrCopy[arrCopy.length - 1] + "}");}//定义一个方法用于打乱数组：public static int[] disturbArray(int[] arr3) {Random r = new Random();int r1 = r.nextInt(arr3.length);int r2 = r.nextInt(arr3.length);int temp = arr3[r1];arr3[r1] = arr3[r2];arr3[r2] = temp;return arr3;}
}

运行结果：