Arrays.java

package java.util;

public class Arrays
{

    private Arrays()
    {
    }

    public static void fill(byte[] ret, byte v)
    {
        for (int i = 0; i != ret.length; i++)
        {
            ret[i] = v;
        }
    }

    public static boolean equals(byte[] a, byte[] a2)
    {
        if (a == a2)
        {
            return true;
        }
        if (a == null || a2 == null)
        {
            return false;
        }

        int length = a.length;
        if (a2.length != length)
        {
            return false;
        }

        for (int i = 0; i < length; i++)
        {
            if (a[i] != a2[i])
            {
                return false;
            }
        }

        return true;
    }

    public static List asList(Object[] a)
    {
        return new ArrayList(a);
    }

    private static class ArrayList
        extends AbstractList
    {
        private Object[] a;

        ArrayList(Object[] array)
        {
            a = array;
        }

        public int size()
        {
            return a.length;
        }

        public Object[] toArray()
        {
            Object[] tmp = new Object[a.length];

            System.arraycopy(a, 0, tmp, 0, tmp.length);

            return tmp;
        }

        public Object get(int index)
        {
            return a[index];
        }

        public Object set(int index, Object element)
        {
            Object oldValue = a[index];
            a[index] = element;
            return oldValue;
        }

        public int indexOf(Object o)
        {
            if (o == null)
            {
                for (int i = 0; i < a.length; i++)
                {
                    if (a[i] == null)
                    {
                        return i;
                    }
                }
            }
            else
            {
                for (int i = 0; i < a.length; i++)
                {
                    if (o.equals(a[i]))
                    {
                        return i;
                    }
                }
            }
            return -1;
        }

        public boolean contains(Object o)
        {
            return indexOf(o) != -1;
        }
    }

}