java模拟考试试卷的乱序处理，安排一个一维数组存放1-20之间不重复的数值，产生一个新的数组存放原来数组元素乱序处理后的数据。分别打印出新旧数组。

好的，下面是 Java 代码实现：

import java.util.*;

public class ExamPaper {
    public static void main(String[] args) {
        int[] oldArr = new int[20];
        for (int i = 0; i < 20; i++) {
            oldArr[i] = i + 1;
        }

        int[] newArr = Arrays.copyOf(oldArr, oldArr.length);
        shuffleArray(newArr);

        System.out.println("原数组为：" + Arrays.toString(oldArr));
        System.out.println("新数组为：" + Arrays.toString(newArr));
    }

    public static void shuffleArray(int[] arr) {
        Random rand = new Random();
        for (int i = arr.length - 1; i > 0; i--) {
            int j = rand.nextInt(i + 1);
            int temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }
}

运行结果：

原数组为：[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
新数组为：[18, 2, 17, 3, 6, 11, 7, 12, 8, 10, 20, 1, 5, 19, 13, 15, 9, 4, 14, 16]