add java examples

java/functionnal/Neighborhood.java

@@ -0,0 +1,43 @@
+package patterns.functionnal;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.function.Function;
+
+import patterns.Point;
+/**
+ * 
+ * @author pouyllau
+ *
+ */
+public class Neighborhood {
+	
+	protected static double step;
+	protected static Point pMin;
+	protected static Point pMax;
+	Function<Point, List<Point>> f;
+	
+	public Neighborhood(Function<Point, List<Point>> f,double step, Point pMin, Point pMax) {
+		super();
+		this.f = f;
+		this.step = step;
+		this.pMin = pMin;
+		this.pMax = pMax;
+	}
+
+	public List<Point> get( Point p) {
+		return f.apply(p);
+	}
+
+	public static Function<Point, List<Point>> quad() {
+		return x -> Point.neighbors_grid(x, step, pMin, pMax,
+				Arrays.asList(new Point(1, 0), new Point(0, -1), new Point(-1, 0), new Point(0, 1)));
+	}
+	
+	public static Function<Point, List<Point>> octo() {
+		return x -> Point.neighbors_grid(x, step, pMin, pMax,Arrays.asList(new Point(1, 0), new Point(1, -1), new Point(0, -1), new Point(-1, -1),
+				new Point(-1, 0), new Point(-1, 1), new Point(0, 1), new Point(1, 1)));
+	}
+	
+}