最大公约数

求最大公约数和最小公倍数

public class first {
public static void main(String []args){
	int a = 12;
	int b = 18;
	while(b!=0){
		int temp = a%b;
		a = b;
		b = temp;			
	}
	int num = a;
	System.out.println(num);
	System.out.println(12*18/num);
}
}