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/MPR121Sample.java

@@ -0,0 +1,43 @@
+public class MPR121Sample{
+	
+	static {
+		try {
+			System.loadLibrary("javaupm_mpr121");
+		}catch (UnsatisfiedLinkError e) {
+			System.err.println("error in loading native library");
+			System.exit(-1);
+		}
+	}
+	
+	private static void printButtons(upm_mpr121.MPR121 touch){
+		boolean buttonPresed = false;
+		
+		System.out.print("Buttons pressed: ");
+		for (int i = 0; i < 12; i++) {
+			if ( (touch.getM_buttonStates() & (1 << i)) != 0 ) {
+				System.out.print( i + " ");
+				buttonPresed = true;
+			}
+		}
+		
+		if (!buttonPresed) 
+			System.out.print("None ");
+		
+		System.out.println();	
+	}
+	
+	public static void main(String[] args) throws InterruptedException {
+		// Instantiate an MPR121 on I2C bus 0
+		upm_mpr121.MPR121 touch = new upm_mpr121.MPR121(0);
+		
+		 // init according to AN3944 defaults
+		touch.configAN3944();
+	
+		while (true) {
+			touch.readButtons();
+			printButtons(touch);
+			Thread.sleep(1000);
+		}
+	}
+
+}