java: added some Java examples

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

examples/java/GroveRotarySample.java

@@ -0,0 +1,30 @@
+public class GroveRotarySample{
+
+	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 {
+		upm_grove.GroveRotary knob = new upm_grove.GroveRotary(0);
+	
+		while (true) {
+			float abs_value = knob.abs_value();	// Absolute raw value
+			float abs_deg = knob.abs_deg();		// Absolute degrees
+			float abs_rad = knob.abs_rad(); 	// Absolute radians
+			float rel_value = knob.rel_value(); // Relative raw value
+			float rel_deg = knob.rel_deg();		// Relative degrees
+			float rel_rad = knob.rel_rad();		// Relative radians
+			
+			System.out.println( "Absolute: " + abs_value + " raw, " + abs_deg + " deg, " + abs_rad + " rad" );
+			System.out.println( "Relative: " + rel_value + " raw, " + rel_deg + " deg, " + rel_rad + " rad" );
+			
+			Thread.sleep(3000);
+		}
+	}
+
+}