import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.util.regex.*;
import java.util.*;

import android.app.Activity;
import android.widget.*;
import android.graphics.*;
import android.hardware.Camera;

public class main {
  public static void main(String[] args) throws Exception {
    System.out.println("Listing cameras...");
    
    int n = Camera.getNumberOfCameras();
    System.out.println("Cameras: " + n);
  }
}