A-M baby

Task/Happy-numbers/Java/happy-numbers.java

@@ -0,0 +1,27 @@
+import java.util.HashSet;
+public class Happy{
+   public static boolean happy(long number){
+       long m = 0;
+       int digit = 0;
+       HashSet<Long> cycle = new HashSet<Long>();
+       while(number != 1 && cycle.add(number)){
+           m = 0;
+           while(number > 0){
+               digit = (int)(number % 10);
+               m += digit*digit;
+               number /= 10;
+           }
+           number = m;
+       }
+       return number == 1;
+   }
+
+   public static void main(String[] args){
+       for(long num = 1,count = 0;count<8;num++){
+           if(happy(num)){
+               System.out.println(num);
+               count++;
+           }
+       }
+   }
+}