java: Added java examples for some sensors

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

examples/java/HTU21DSample.java

@@ -0,0 +1,33 @@
+import upm_htu21d.javaupm_htu21dConstants;
+
+public class HTU21DSample{
+
+	static {
+		try {
+			System.loadLibrary("javaupm_htu21d");
+		}catch (UnsatisfiedLinkError e) {
+			System.err.println("error in loading native library");
+			System.exit(-1);
+		}
+	}
+	
+	public static void main(String[] args) throws InterruptedException {
+		float humidity    = 0;
+	    float temperature = 0;
+	    float compRH      = 0;
+	    
+	    upm_htu21d.HTU21D sensor = new upm_htu21d.HTU21D(1);
+		sensor.testSensor();	    
+	    
+		while (true) {
+			compRH = sensor.getCompRH();
+			humidity = sensor.getHumidity();
+			temperature = sensor.getTemperature();
+			
+			System.out.println( "Humidity: " + humidity + ", Temperature: " + temperature + ", compensated RH: " + compRH);
+			
+			Thread.sleep(5000);
+		}
+	}
+
+}