我怎么不能在Java中对数组进行递减计数呢？

Question

I am currently trying to take the elements of an array and reverse its order in Java. How come I cannot print the elements of the array by counting downwards using a for loop without changing the actual ordering of elements in my array?

private void printArray(int[] array) {
    for (int i = array.length; i >= 0; i--){
        println(array[i]);
    }
}

Answer 1

Array indices start at 0 and end at array.length - 1 . Here, you get an ArrayIndexOutOfBOundsException since your first read is past the end of the array ( int i = array.length; ).

Do:

for (int i = array.length - 1; i >= 0; i--)
    println(array[i]);

Answer 2

Try

for (int i = array.length - 1; -1 != i; --i){

As indexes start from 0