added flyweight example

src/learn/simple_flyweight/UnsharedConcreteFlyweight.java

@@ -0,0 +1,15 @@
+package learn.simple_flyweight;
+
+public class UnsharedConcreteFlyweight extends Flyweight {
+    private long allState;
+
+    public UnsharedConcreteFlyweight(long allState) {
+        super();
+        this.allState = allState;
+    }
+
+    @Override
+    public void operation(long extrinsicState) {
+        System.out.println("Unshared Flyweight " + allState + " calling operation with extrinsic state " + extrinsicState);
+    }
+}