/**
 * This program illustrates how to "expand" an array
 * Requires 3 steps:
 * 1. Create a new, larger array
 * 2. Use a loop to copy each element from the old to the new
 * 3. Assign the new array to the original array variable
 */
public class CopyArrayExample
{
    public static void main(String [] args) {
        int [] orig = {4,9,-2};
        
        // to copy an array, this doesn't do it!
        int [] copy = orig;
        
        // Here is what you have to do:  
        // Instantiate new array
        copy = new int[6];
        
        // Copy each element
        for(int i = 0; i < orig.length; i++)    {
            copy[i] = orig[i];
        }
        
        // Assign the new array memory address to the old array name
        // Java's garbage collector will take care of the old array space
        orig = copy;
        System.out.println("orig[5] = " + orig[5]);        
    }
}