SOlution for: Happy Number

Author: edyluisrey

src/leetcode/HappyNumber.java

@@ -0,0 +1,28 @@
+package leetcode;
+
+import java.util.HashSet;
+
+public class HappyNumber {
+
+	public static void main(String[] args) {
+		HappyNumber test = new HappyNumber();
+		System.out.println(test.isHappy(19));
+	}
+	
+	public boolean isHappy(int n) {
+        HashSet<Integer> set = new HashSet<>();
+        while(!set.contains(n)){ 
+        	set.add(n);
+        	int sq= 0;
+        	while(n>0){
+        		int digit= n%10;
+        		sq+=digit*digit;
+        		n= n/10;
+        	}  System.out.println(sq);
+        	if(sq==1) return true;        	
+        	n=sq;
+        }
+        return false;
+    }
+
+}