Add fib-java

1 files changed, 13 insertions, 0 deletions

diff --git a/entries/nritschel/fib-java/src/CachedFibonacciNumberFactory.java b/entries/nritschel/fib-java/src/CachedFibonacciNumberFactory.java
new file mode 100644
index 0000000..5c404e8
--- /dev/null
+++ b/entries/nritschel/fib-java/src/CachedFibonacciNumberFactory.java
@@ -0,0 +1,13 @@
+import java.util.HashMap;
+
+public class CachedFibonacciNumberFactory implements FibonacciNumberFactory {
+    private final HashMap<Integer, FibonacciNumber> cachedNumbers = new HashMap<>();
+
+    @Override
+    public FibonacciNumber getFibonacciNumber(int num) {
+        if (!cachedNumbers.containsKey(num)) {
+            cachedNumbers.put(num, new FibonacciNumber(num));
+        }
+        return cachedNumbers.get(num);
+    }
+}