Find If The Given Matrix Is An Upper Triangle Matrix - Java Quiz Question

Write a program to find if the given matrix is an upper triangle matrix.
Assume that matrices are square matrices.

Input (Two Dimensional matrix)	Output (boolean)
`5 4 5 0 6 2 0 0 8`	true
`5 2 3 8 0 1 9 7 0 0 0 4 0 0 0 6`	true
`0 0 0 0`	true
`0 9 2 8 0 4 6 4 0`	false
`12 89 77 0 99 66 45 0 111`	false


			

			class IsUpperTriangleMatrix 
 { 

			    public static void main(String s[])
    {
        int input[][] = {{5, 4, 5}, {0, 6, 2}, {0, 0, 8}};
        System.out.println("The given matrix is an upper triangle matrix : " + isUpperTriangleMatrix(input));

    }
 
			

			

					    public static boolean isUpperTriangleMatrix(int matrix[][]) {

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