Java: Adding an example for the Grove Collision Sensor

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/java/GroveCollision.java

@@ -0,0 +1,63 @@
+/*
+ * Author: Abhishek Malik <abhishek.malik@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+import upm_grovecollision.*;
+
+public class GroveCollision {
+
+	static boolean shouldRun = true;
+	static {
+		try {
+			System.loadLibrary("javaupm_grovecollision");
+			System.loadLibrary("mraajava");
+		} catch (UnsatisfiedLinkError e) {
+			System.err.println(
+					"Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
+							e);
+			System.exit(1);
+		}
+	}
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		// Initializing the sensor on D2 on the Base Shield
+		upm_grovecollision.GroveCollision collision = new upm_grovecollision.GroveCollision(2);
+		boolean collisionState = false;
+
+		// ! [Interesting]
+		while(shouldRun){
+			if(collision.isColliding() && !collisionState){
+				System.out.println("Collision!!");
+				collisionState = true;
+			}
+			else if (collisionState){
+				System.out.println("No Collision!");
+				collisionState = false;
+			}
+		}
+		// ! [Interesting]
+		System.out.println("Exiting");
+	}
+
+}