Really I tried a lot with MCP3208 external ADC to interface with the Raspberry pi. Searched for various codes but nothing was available in JAVA. So after some research i got some python code and modified that to JAVA. in this i have used the Pi4J library.
/****
*Author : Bikash Narayan Panda
*Use : This is used to read ADC data foem the MCP3208 SPI based ADC.
*Date :19/Nov/2014
*Tags: Please Include the Pi4J Library.
*
*
**/
import java.io.IOException;
import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalInput;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.PinPullResistance;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.RaspiPin;
public class SensorTest {
public static int readadc(int adcnum, GpioPinDigitalOutput clockpin,
GpioPinDigitalOutput mosi