JAVA duplex problem

Hello, everyone I couldn't find an answer while solving the question, so I asked this question.

Write the JAVA code to multiply a given input or get an additional table!

• Note: – Use LOOP, IF/ELSE, and METHODS.

– Use the scanner class to get input from the user. Multiply operation if input operation equals 1. If the input operation equals 2, it is an additional operation. Other input numbers exit the program without performing any action.

– Use of character inputs ('*' and '+') to gain additional points. That's the question.

I coded it to make it like this ;

    int N= 6;
    int[][] array = new int[N][N];
    for(int i = 0; i < N;  i++)
    {
        for(int j = 0; j < N; j++)
        {
            array[i][j] = (int)(Math.i*j) ;
                                }
                                }

                                for(int i = 0; i < N; i++)
                                {
                                System.out.print(array[i][j] + " ");
                                }
    System.out.println();
}

I tried to make a code like this, but there is an error. I want to know which part is the problem and how to correct it to make it like this example above.