java: added examples and solved some issues with the naming convention

Signed-off-by: Stefan Andritoiu <stefan.andritoiu@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/java/GroveRelaySample.java

@@ -0,0 +1,27 @@
+public class GroveRelaySample{
+	static {
+		try {
+			System.loadLibrary("javaupm_grove");
+		}catch (UnsatisfiedLinkError e) {
+			System.err.println("error in loading native library");
+			System.exit(-1);
+		}
+	}
+	
+	public static void main(String[] args) throws InterruptedException {
+		// Create the button object using UART
+		upm_grove.GroveRelay relay = new upm_grove.GroveRelay(5);
+	
+		for( int i = 0 ; i < 3 ; i++ ){
+			relay.on();
+			if( relay.isOn() )
+				System.out.println("Relay is on");
+			Thread.sleep(1000);
+			
+			relay.off();
+			if( relay.isOff() )
+				System.out.println("Relay is off");
+			Thread.sleep(1000);
+		}
+	}
+}