Java İkiz Asal Sayılar

public class ikiz_asal_sayilar {

 public static void main(String[] args) {

  int y=0;
         for(int i=2; i<60; i++){
             y=i+2;
             if(asalsayi(i)==0 && asalsayi(y)==0){
                 System.out.println("("+i+", "+y+")");
             }
             else continue;
         }
     }
     public static int asalsayi(int x){
         int c = 0;
         for(int i=2; i<=Math.sqrt(x); i++){
             if(x%i==0) c++;
         }
         if(c==0) return 0;
         else return 1;
     }
 }