New to Java

Hi there :)
I started learning Java a few days ago and have now run into my first problem :p

I am using Netbeans on Mac OS X.

I need to find the smallest value from an array. So far I've had no luck. Any suggestions would be fantastic.

The code so far:

/*
 * Math Problems
 *
 * Created on May 4, 2007, 10:54 AM
 *
 * PROJECT 1: - IN PROGRESS
 * Create a program that allows you to create an integer array of 18 elements with the following values
 * 3, 2, 4, 5, 6, 4, 5, 7, 3, 2, 3, 4, 7, 1, 2, 0, 0, 0
 *
 *  - The program computes the sum of elements 0 to 14 and stores it in element 15                              // COMPLETED
 *  - The program computes the average and stores it in element 16                                              // COMPLETED
 *  - The program finds the smallest value from the array and stores it in element 17
 *
 * PROJECT 2: - TO DO
 * Write a program that accepts from the command line and prints them out. Then use a for loop to print
 * the next 13 numbers in the sequence where each number is the sum of the previous two. FOR EXAMPLE:
 *
 *  - input>java prob2 1 3
 *  - output>1 3 4 7 11 18 29 47 76 123 322 521 843 1364
 *
 * PROJECT 3: - TO DO
 * Write a program that accepts from the command line two numbers in the range from 1 to 40. It then
 * compares these numbers against a single dimension array of five integer elements ranging in value
 * from 1 to 40. The program displays the message BINGO if the two inputted values are found in the array
 * element. FOR EXAMPLE:
 *
 *  - input>java prob3 3 29
 *  - output>Your first number was 3
 *  -        Your second number was 29
 *  -        Its Bingo!  // This message if 3 and 29 are found in the array
 *  -        Bokya!      // This message if 3 and 29 are not found in the array
 *  -        The array was 7 5 25 5 19 30
 *
 * PROJECT 3 EXTENSION: - OPTIONAL
 * Generate the array of 5 unique integers using random numbers
 *
 */

package mathproblems;

/**
 *
 * @author Mohammad Ali
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        
        int A[]={3,2,4,5,6,4,5,7,3,2,3,4,7,1,2,0,0,0};
        
        int O = A.length - 3;
        
        int B = A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7] + A[8] + A[9] + A[10] + A[11] + A[12] + A[13] + A[14];
        A[15] = B;  // Stores the sum of the integers in A[15]

        int C = B / O;
        A[16] = C;  // Computes and stores the average in A[16]
        
        int D = 101;
        
            if (A[0] < A[1]) { D = A[0]; }
            else { D = A[1]; }

            if (A[1] < A[2]) { D = A[1]; }
            else { D = A[2]; }
                
        System.out.println("There are " + O + " numbers in the Array");
        System.out.println("Those numbers add up to " + B + ".");
        System.out.println("The average of those numbers is " + C + ".");
        System.out.println("The smallest value in the array is " + D + ".");
    }
    
}

The code is incomplete, but it works so far. The problem is I know there must be an easier way. SAVE ME :)