一定要java 求两个数x，y的最大公约数g。(x<=y)

public class ThreeMulti {

* @param a,b
* @return
* 求两个数的最大公约数

public int gongYue(int a,int b){
int m = 1;
//如果a小于b则交换位置
if(a<b){
m = a;
a = b;
b = m;
}
while(m != 0){
m = a%b;
a = b;
b = m;
}
return a;
}

class CommonDivisor
{
public static void main(String arg[])
{
int m,n,r,u,v,s;
m=8;
n=12;
u=m;
v=n;
do
{
r=u%v;
if(r==0)
continue;
u=v;
v=r;
}while(r!=0);
System.out.println(\"m,n的最大公约数为\"+v);
}
}
是别人的！

import java.util.Random;

public class gongyue {
public static voi