Differences between passing basic data type values in java and passing array reference variables to methods

When I first entered the world of java, I found that it was so beautiful. It's still a long journey. I hope everyone can continue. For the first time I wrote a blog, I would like to give you some advice on some shortcomings.

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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;    }}

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This article from the "codenong" blog, please be sure to keep this source http://yw1994.blog.51cto.com/7621136/1298271