//TestEquals.java

/**
 * A demonstration program to test two arrays for equality.
 */
public class TestEquals
{
    public static void main(String[] args)
    {
        int[] a = new int[3];
        int[] b = new int[3];
        setArray(a);
        setArray(b);

        if (b == a)
            System.out.println("Equal by ==.");
        else
            System.out.println("Not equal by ==.");

        if (equals(b, a))
            System.out.println("Equal by the equals method.");
        else
            System.out.println("Not equal by the equals method.");
    }

    public static boolean equals
    (
        int[] a,
        int[] b
    )
    {
        boolean elementsMatch = true; //tentatively
        if (a.length != b.length)
            elementsMatch = false;
        else
        {
            int i = 0;
            while (elementsMatch && (i < a.length))
            {
                if (a[i] != b[i])
                    elementsMatch = false;
                i++;
            }
        }

        return elementsMatch;
    }

    public static void setArray
    (
        int[] array
    )
    {
        for (int i = 0; i < array.length; i++)
            array[i] = i;
    }
}