Two numeric comparison size

Hello everyone

See this question today, three ways to summarize:

The first: This is one of the most common ways to develop, using the third variable, the readability is strong!

<strong><span style= "FONT-SIZE:18PX;" >public class Test{public static void Main (String [] args) {int m = 5, n = 2,max;if (n<m) {max = M;m = n;  n = max;  } System.out.println ("n=" +n+ "m=" +m); }}</span></strong>

The second way is to use two and make two number exchange! The third variable is not required, and the limitation is that n+m must be within the range of int

<strong><span style= "FONT-SIZE:18PX;" >public class Test{public static void Main (String [] args) {   int n = 2, m= 5;    n =n+m;               m = n-m;    n = n-m;   System.out.println ("n=" +n+ "m=" +m); }}</span></strong>

third, do not use third-party variables, to achieve the size of the swap, skill way!

<strong><span style= "FONT-SIZE:18PX;" >public class Test{public static void Main (String [] args) {   int n = 2, M = 5;   n = n ^m;   M  = n^ m;  (n^m) ^m   n= n^m;<span style= "White-space:pre" ></span>//System.out.println   ("n=" +n+ "m=" +m) ; }}</span></strong>

Results:

n=2 m=5

Two numeric comparison size