SwapInPlace.java

//http://coolcodebro.blogspot.com/2012/12/swap-number-in-place.html

void run() {
	swap(10, 25);
}

void swap(int a, int b) {
	if(a > b)
		swapM(a, b);
	else
		swapM(b, a);
}

void swapM(int max, int min) {
	System.out.printf("Before:%n a: %d, b: %d %n", max, min);
	
	max = max-min;	//25-15 = 15
	min = max+min;	//15+10 = 25
	max = min-max;	//25-15 = 10
	
	System.out.printf("After:%n a: %d, b: %d %n", max, min);		
}