New to Java

I decided to test my one years worth of java programming training I have learned this year in high school.
I found this assignment online and started following it.
I am having trouble with Part 3 (attacking ships)
this is the description in the class given of the method:

/**
     * Attacks the grid cell at the specified row and column.
     * If the grid cell contains:
     *   - SHIP: the value of the cell is set to HIT
     *   - HIT: the value of the cell does not change
     * Otherwise, the value of the cell is set to MISS.
     *
     * This method returns true if the attack resulted in a ship being hit,
     * and false otherwise.
     *
     * Note: this method also returns true if a cell that has already
     * been hit is attacked.
     *
     * @param    row    the row of the cell to attack
     * @param    col    the column of the cell to attack
     *
     * @return   true if the attack results in a ship being hit (even
     *           if the ship at that cell has already been hit),
     *           false otherwise
     */
     public boolean attack(int row, int col)
         {
      
          //FILL IN THIS CODE
             return false;

         }

There is a getCell method that returns the value in the given row, column of the 2d array. (I assume i will need this to check the value before making it a HIT)
What I have the question about is, how do I set up the boolean expression. My class didn't cover boolean true/false statements well.
Whats the best way to set up this attack method where I fill in the code?
Thanks for any help given! Let me know if you need any of my code so far.

Jon