Data commit

Task/Fibonacci-sequence/Java/fibonacci-sequence-7.java

@@ -0,0 +1,18 @@
+import java.util.function.LongUnaryOperator;
+import java.util.stream.LongStream;
+
+public class FibUtil {
+ public static LongStream fibStream() {
+  return LongStream.iterate( 1l, new LongUnaryOperator() {
+   private long lastFib = 0;
+   @Override public long applyAsLong( long operand ) {
+    long ret = operand + lastFib;
+    lastFib = operand;
+    return ret;
+   }
+  });
+ }
+ public static long fib(long n) {
+  return fibStream().limit( n ).reduce((prev, last) -> last).getAsLong();
+ }
+}