Java の配列は値渡しですか、それとも参照渡しですか?

public static void changeContent(int[] arr) {

    // If we change the contnet of arr.
    arr[0] = 10;  // Will change the content of array in main()
}

public static void changeRef(int[] arr) {
    // If we change the reference
    arr = new int[2];  // Will not change the array in main()
    arr[0] = 15;
}

public static void main(String[] args) {
    int[] arr = new int[2];
    arr[0] = 4;
    arr[1] = 5;

    changeContent(arr);

    System.out.println(arr[0]);  // Will print 10..
    
    changeRef(arr);

    System.out.println(arr[0]);  // Will still print 10..
                                  // Change the reference doesn't reflect change here..
}