倒水有关问题

倒水问题
庞果网上看到的
然后自己写了一个，可是有点问题，有的时候正常有的时候死循环求教啊
import java.util.*;
public class Lianxi1
{
  
    public static void main(String[] arge)
     {
           int a,b,c;
           a=(int)(Math.random()*1000000);
                  System.out.print("生成A为:"+a);
          
          b=(int)(Math.random()*1000000);
          System.out.print("生成B为:"+b);
 
          c=(int)(Math.random()*1000000);
          System.out.print("生成C为:"+c);
         System.out.println("水缸是否刚好有C升水？");
      System.out.println(a+b+c);//测试程序进行
         boolean bl=Lianxi1.can(a,b,c); //判断是否能成功
        System.out.println(bl);    
     }
  public static boolean can(int a,int b,int c)
  {    
         
      int sum=0;
       int d=0;
      int difference=0;
      int c2=0;
       if(a<b)
        {
           d=a;
           a=b;
           b=d;
         }
        difference=a-b;
      if(b%difference!=0||c%difference==0){
       while(sum!=c)
        {
             
                if(difference<c-sum)
                     {
                         sum+=difference; 
                        
                      }else{
                            int b2=0,a2=0;
                         while(difference!=c-sum)
                          {  
                               c2=difference;
                               b2=b-c2;
                               a2=a-b2  ;
                                difference=a2-b;
                          }
                           sum+=difference;
                             
                          } 
        }
      return true;
      }else{ return false;}
   }
}