New to Java

sorry i'm new to this forum and first time posting so bare with me for the long post for just a simple question.

i've been asked to write a piece of array code that gets 5 numbers from user and then display the highest number inputted.
here is my code:

public class Math2
{
    private int[] Math2;

    public Math2()
    {

    }
    
    public int getHighest(int[] Math2)
    {
        java.util.Arrays.sort(Math2);
        int largest = Math2[Math2.length-1];
        return largest;
    }
}

now my code works fine but here comes the problem... i've been given a unit test to test my code, and whats happening is that they dont mix lol, i've been getting error and i have no idea how to get this fixed

unit test code is this:

public void testHighestFirst()
    {
        Math2 math1 = new Math2(new int[]{5, 1, 2, 4, 3});
        assertEquals(5, math1.getHighest());
    }

the error i'm getting is this:

"cannot find symbol - constructor Math2(int[])"

what can i do to get this fixed? ( i use blue J if thats even relevant at all)