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reverse array method not working


The variable list in the reverse method only exists for the lifetime of the method. You need to either return the new reverse list and assign it to a variable (example below), or modify the original list itself (Elliott Frisch's answer).

public class ReverseArray {
    public static void main(String[] args) {
        int[] list = {1, 2, 3, 4, 5};
        list = reverse(list);

        for (int i = 0; i < list.length; i++) {
            System.out.print(list[i] + " ");
        }
    }

    public static int[] reverse(int[] list) {
        int[] temp = new int[list.length];
        for (int i = 0; i < list.length; i++) {
            temp[i] = list[(list.length - 1) - i];
        }
        return temp;
    }
}

Categories : Java

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