Passing Arrays to Methods
(pass-by-reference)

int [ ] num = {1, 2, 3};
testingArray(num);   //Method call
System.out.println("num[0] = " + num[0] + "\n num[1] = " + num[1] + "\n num[2] =" + num[2]);
. . . 

You will need to be careful when sending an array to a method.  Remember that any changes made to the array in the method will change the data in the original array.  Be sure that your intention is to change the original data (thus losing the original data).

Example:  Fill an array with 10 integer values.  Pass the array to a method that will add up the values and return the sum.  (In this example, no original data in the array was altered.  The array information was simply used to find the sum.)

import java.io.*;
import BreezyGUI.*;

public class FindSum
{
     public static void main (String [ ] args)
     {
            int [ ]  number = new int [ 10];   // instantiate the array
            int i;
            int sum=0;

            for ( i = 0; i < 10; i++ )            // fill the array
               number[ i ] = Console.readInt("Enter number: " );

            int sum = find_sum(number);   // invoke the method
           System.out.println("The sum is" +sum + ".");
     }

    public static int  find_sum(int [ ] value)  //method definition to find sum
    {
          int i, total = 0;
          for(i=0; i<10; i++)
          {
              total = total + value[ i ];
          }

          return (total);
     }