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/GUVAS12DSample.java

@@ -0,0 +1,30 @@
+//import upm_guvas12d.GUVAS12D;
+
+public class GUVAS12DSample{
+	// analog voltage, usually 3.3 or 5.0
+	private static final float GUVAS12D_AREF = 5;
+	private static final int SAMPLES_PER_QUERY = 1024;
+
+	
+	static {
+		try {
+			System.loadLibrary("javaupm_guvas12d");
+		}catch (UnsatisfiedLinkError e) {
+			System.err.println("error in loading native library");
+			System.exit(-1);
+		}
+	}
+	
+	public static void main(String[] args) throws InterruptedException {
+		upm_guvas12d.GUVAS12D volts = new upm_guvas12d.GUVAS12D(3);
+		
+		while (true) {
+			float value = volts.value(GUVAS12D_AREF, SAMPLES_PER_QUERY);
+			
+			System.out.println("AREF: " + GUVAS12D_AREF + ", Voltage value (higher means more UV): " + value );
+		
+			Thread.sleep(1000);
+		}
+	}
+
+}