在方法中将数组作为参数传递

public class ArrayExample {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 5};
        System.out.println("Before modification: " + Arrays.toString(numbers));
        modifyArray(numbers);
        System.out.println("After modification: " + Arrays.toString(numbers));
    }

    public static void modifyArray(int[] arr) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] *= 2;
        }
    }
}

Before modification: [1, 2, 3, 4, 5]
After modification: [2, 4, 6, 8, 10]

public static void safeAccess(int[] arr, int index) {
    if (index >= 0 && index < arr.length) {
        System.out.println(arr[index]);
    } else {
        System.out.println("Index out of bounds");
    }
}

public static void processArray(int[] arr) {
    if (arr != null) {
        for (int num : arr) {
            System.out.println(num);
        }
    } else {
        System.out.println("Array is null");
    }
}