初入java的世界，发现是那样的美好啊。走的路还很长，希望大家一起走下去吧。第一次写博客，有不足的地方，多多指教。  

class Test10{    public static void main(String[] args)    {        int[] array = {1, 2};        System.out.println("Before for swap: " + array[0] + "  " + array[1]);        swap(array[0], array[1]);        System.out.println("after for swap: " + array[0] + "   " + array[1]);        System.out.println("Before for swap: " + array[0] + "  " + array[1]);        swapFirstTwoInArray(array);        System.out.println("after for swap: " + array[0] + "   " + array[1]);                  }    public static void swap(int n1, int n2) {        int temp = n1;        n1 = n2;        n2 = n1;    }    public static void swapFirstTwoInArray(int[] array) {        int temp = array[0];        array[0] = array[1];        array[1] = temp;    }}