算法题

给定字符数组逆序

 /**
     * 双倍空间前后颠倒
     * @return
     */
    public void reverse1() {
        char[] array = {'q','w','r','d','h','v','s'};
        int n = array.length;
        char[] resultArray = new char[n];

        for (int i=n-1,j=0 ; i >= 0 ; i--,j++) {
            resultArray[j] = array[i];
        }
    }

    /**
     * 将字符串前后交换
     * @param s
     * @return
     */
    public void reverse2(String s) {
        char[] array = {'q','w','r','d','h','v','s'};
        int n = array.length;
        for (int i = 0,k=n-1-i; i < k; i++) {
            char temp = array[k];
            array[k]=array[i];
            array[i]=temp;
        }
    }