Battleships - guys please help me out!

[Koert Kopbeen]

Hey everyone

I posted the program three times already - each time with great help: thanks. But I really need you guys to help me out NOW. I have created a simple BattleShips program, consisting of a 2X2 array, with 10 spaces. It displays the board, with the column number (char) above it and the row number (int) next to it. The program works just fine as it is, but I really want to add some GUI to it. I have imported GridLayout - java.awt - (if you run the class you will see how it looks) but I don't know how to implement it into my BattleShips.

I basically need to shadow the spaces of the array (whether it contains a value or not) with GridLayout to allow the user to click on the space to show the value of the array.

A miss (or blank space) = 'M' and all other values (ship, battleship, aircraft carrier) = 'X' (for a hit).

Guys I really need you to help me out with it. Can anybody place GridLayout over the spaces of the array?

Thanks. The code follows:

 import java.io.*;
import java.awt.*;
import java.applet.Applet;
 
public class BattleShips extends Applet
{
 
    private char [] [] board = new char [10] [10];
    BufferedReader input = new BufferedReader (new InputStreamReader (System.in));
 
    public void init ()
    {
        setLayout (new GridLayout (10, 10));
 
        for (int i = 0 ; i < 10 ; i++)
        {
            add (new Button ("1"));
            add (new Button ("2"));
            add (new Button ("3"));
            add (new Button ("4"));
            add (new Button ("5"));
            add (new Button ("6"));
            add (new Button ("7"));
            add (new Button ("8"));
            add (new Button ("9"));
            add (new Button ("10"));
 
        }
    }
 

    void blank ()
    {
 

        for (int i = 0 ; i < 10 ; i++)
        {
 
            for (int j = 0 ; j < 10 ; j++)
            {
                // setLayout (new GridLayout (10, 10));
                //
                // for (int ki = 0 ; ki < 10 ; ki++)
                // {
                //     add (new Button ("1")).equals (board [i] [j]);
                //     add (new Button ("2"));
                //     add (new Button ("3"));
                //     add (new Button ("4"));
                //     add (new Button ("5"));
                //     add (new Button ("6"));
                //     add (new Button ("7"));
                //     add (new Button ("8"));
                //     add (new Button ("9"));
                //     add (new Button ("10"));
                //
                // }
                board [i] [j] = ' ';
 
                // System.out.println (board [i] [j]);
            }
 
        }
 

    }
 

    void place ()
    {
 
        boolean beset = false;
 
        int countS = 0;
        int countA = 0;
        int countB = 0;
 
        for (int y = 0 ; y < 5 ; y++)
        {
 
            while (!beset)
            {
                int i = (int) (Math.random () * 10);
                int j = (int) (Math.random () * 10);
 
                if (board [i] [j] == ' ')
                {
 

                    board [i] [j] = 'S';
                    //  System.out.println (board [i] [j]);
 
                    countS++;
                    beset = true;
 
                }
                else
                {
                    countS = countS;
                }
 
            }
            beset = false;
        }
 
        for (int k = 0 ; k < 3 ; k++)
        {
            while (!beset)
            {
                int i = (int) (Math.random () * 10);
                int j = (int) (Math.random () * 10);
                int one2 = (int) (Math.random () * 2);
 

                if (one2 == 0)
                {
 
                    if ((board [i] [j] == ' ') && (j < 6))
                    {
                        if (board [i] [j + 1] == ' ')
                        {
                            if (board [i] [j + 2] == ' ')
                            {
                                for (int e = j ; e < j + 3 ; e++)
                                {
 
                                    board [i] [e] = 'B';
                                    //  System.out.println (board [i] [e]);
                                }
 
                                // countB++;
                                beset = true;
 
                            }
                        }
                    }
                }
                else
                {
 
                    if ((board [i] [j] == ' ') && (i < 6))
                    {
                        if (board [i + 1] [j] == ' ')
                        {
                            if (board [i + 2] [j] == ' ')
                            {
                                for (int e = i ; e < i + 3 ; e++)
                                {
 
                                    board [e] [j] = 'B';
                                    //   System.out.println (board [e] [j]);
                                }
 
                                // countB++;
                                beset = true;
 
                            }
                        }
                    }
 

 
                }
                //     else
                //     {
                //        countB = countB;
                //   }
 
            }
            beset = false;
        }
 
        while (!beset)
        {
            int i = (int) (Math.random () * 10);
            int j = (int) (Math.random () * 10);
            int oneTwo = (int) (Math.random () * 2);
 
            if (oneTwo == 0)
            {
 
                if ((board [i] [j] == ' ') && (j < 6))
                {
                    if (board [i] [j + 1] == ' ')
                    {
                        if (board [i] [j + 2] == ' ')
                        {
                            if (board [i] [j + 3] == ' ')
                            {
                                if (board [i] [j + 4] == ' ')
                                {
                                    for (int r = j ; r < j + 5 ; r++)
                                    {
                                        board [i] [r] = 'A';
                                        // System.out.println (board [i] [r]);
 
                                    }
                                    beset = true;
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                if ((board [i] [j] == ' ') && (i < 6))
                {
                    if (board [i + 1] [j] == ' ')
                    {
                        if (board [i + 2] [j] == ' ')
                        {
                            if (board [i + 3] [j] == ' ')
                            {
                                if (board [i + 4] [j] == ' ')
                                {
                                    for (int r = i ; r < i + 5 ; r++)
                                    {
                                        board [r] [j] = 'A';
                                        //  System.out.println (board [r] [j]);
 
                                    }
                                    beset = true;
                                }
                            }
                        }
                    }
                }
 
            }
 

            //  countA++;
            //  beset = true;
        }
        // else
        //{
        //    countA = countA;
 
    }
 

    void display ()
    {
 
        System.out.println ("     A    B    C    D    E    F    G    H    I    J");
        System.out.println ();
 
        for (int i = 0 ; i < 10 ; i++)
        {
            if (i < 9)
            {
                System.out.print ((i + 1) + "    ");
            }
            else
            {
                System.out.print ((i + 1) + "   ");
            }
 
            for (int j = 0 ; j < 10 ; j++)
 
                {
                    //    System.out.println (board [i] [j]);
                    switch (board [i] [j])
                    {
                        case ' ':
                            System.out.print ("0    ");
                            break;
 
                        case 'S':
                            //System.out.print ("S    ");
                            System.out.print ("0    ");
                            break;
 
                        case 'A':
                            // System.out.print ("A    ");
                            System.out.print ("0    ");
                            break;
 
                        case 'B':
                            //System.out.print ("B    ");
                            System.out.print ("0    ");
                            break;
 
                        case 'X':
                            System.out.print ("X    ");
                            //System.out.print ("0    ");
                            break;
 
                        case 'M':
                            System.out.print ("M    ");
                            break;
 
                        default:
                            System.out.print ("p    ");
                    }
 
                }
 
            System.out.println ();
        }
    }
 

    void askUser () throws IOException
    {
        System.out.println ();
        int score = 100;
        int countX = 0;
        do
        {
            System.out.println ();
            System.out.println ("Your current score is " + score + ".");
            System.out.println ();
            System.out.println ("Please enter the location to hit! ! !");
            System.out.println ();
            System.out.print ("Column: ");
 
            String columnIndex = input.readLine ().toLowerCase ();
            char columnChar = columnIndex.charAt (0);
 
            int column = 0;
 
            switch (columnChar)
            {
                case 'a':
                    column = 0;
                    break;
 
                case 'b':
                    column = 1;
                    break;
 
                case 'c':
                    column = 2;
                    break;
 
                case 'd':
                    column = 3;
                    break;
 
                case 'e':
                    column = 4;
                    break;
 
                case 'f':
                    column = 5;
                    break;
 
                case 'g':
                    column = 6;
                    break;
 
                case 'h':
                    column = 7;
                    break;
 
                case 'i':
                    column = 8;
                    break;
 
                case 'j':
                    column = 9;
                    break;
 
                default:
                    System.out.println ();
                    System.out.println ();
 
                    System.out.println ("No. Please stay within the limits - enter a letter between A and J.");
                    System.out.println ();
                    continue;
 
            }
 
            System.out.print ("Row:    ");
            int rowInt = Integer.parseInt (input.readLine ());
 
            int row = 0;
 
            switch (rowInt)
            {
                case 1:
                    row = 0;
                    break;
 
                case 2:
                    row = 1;
                    break;
 
                case 3:
                    row = 2;
                    break;
 
                case 4:
                    row = 3;
                    break;
 
                case 5:
                    row = 4;
                    break;
 
                case 6:
                    row = 5;
                    break;
 
                case 7:
                    row = 6;
                    break;
 
                case 8:
                    row = 7;
                    break;
 
                case 9:
                    row = 8;
                    break;
 
                case 10:
                    row = 9;
                    break;
 
                default:
                    System.out.println ();
                    System.out.println ();
 
                    System.out.println ("No, sorry. Please enter a row number between 1 and 10.");
 
                    continue;
 

            }
 
            switch (board [row] [column])
            {
                case ' ':
                    board [row] [column] = 'M';
                    System.out.println ();
                    System.out.println ("Sorry - no luck!");
                    System.out.println ("Five points will be deducted from your score!");
                    System.out.println ();
                    score = score - 5;
                    display ();
                    break;
 
                case 'A':
                    board [row] [column] = 'X';
                    System.out.println ();
                    System.out.println ("Well done! You've hit an AIRCRAFT CARRIER.");
                    System.out.println ("Fifteen points will be added to your score!");
                    System.out.println ();
                    score = score + 15;
                    display ();
                    break;
 
                case 'B':
                    board [row] [column] = 'X';
                    System.out.println ();
                    System.out.println ("Well done! You've hit a BATTLESHIP.");
                    System.out.println ("Ten points will be added to your score!");
                    System.out.println ();
                    score = score + 10;
                    display ();
                    break;
 

                case 'S':
                    board [row] [column] = 'X';
                    System.out.println ();
                    System.out.println ("Well done! You've hit a SHIP.");
                    System.out.println ("Five points will be added to your score!");
                    System.out.println ();
                    score = score + 5;
                    display ();
                    break;
 
                default:
                    System.out.print ("Mistake");
                    System.exit (0);
 
            }
            countX++;
 
            if (countX == 19)
            {
                System.out.println ();
                System.out.println ("Well done! You have successfully completed the grid!!");
 
                for (int i = 0 ; i < 10000000 ; i++) // counts a few seconds before exiting.
                {
                    System.exit (0);
                }
            }
        }
 
        while (score > 0);
        {
            System.out.println ("Game Over");
        }
 

 

 

        /*    if (board [row] [column] == ' ')
            {
                System.out.println ("Sorry, no hit!!");
                board [row] [column] = 'X';
 
            }
            else
            {
                if (board [row] [column] == 'A')
 

 
            }
        }*/
    }
 

 

 

    /*    if (board [row] [column] == ' ')
        {
            System.out.println ("Sorry, no hit!!");
            board [row] [column] = 'X';
 
        }
        else
        {
            if (board [row] [column] == 'A')
 

 
        }
    }*/
}
 

 

 // The "BattleShipsDriver" class.
 
import java.io.*;
 
public class BattleShipsDriver
{
    public static void main (String[] args) throws IOException
    {
        BattleShips mainObj = new BattleShips ();
        System.out.println ();
        System.out.println ("Welcome to Jasper's BattleShips!");
        System.out.println ();
        System.out.println ("Your score will start at 100. ");
        System.out.println ("The program will terminate if you reach a score below 0. Good Luck!");
        System.out.println ();
        System.out.println ();
 
        mainObj.blank ();
        mainObj.place ();
        mainObj.display ();
        mainObj.askUser ();
        // Place your code here
    } // main method
} // BattleShipsDriver class
 

[Mark Spritzler]

First the Main program when hitting just Enter and no Column at the Column prompt you will get an Exception

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String ind
ex out of range: 0
        at java.lang.String.charAt(String.java:558)
        at BattleShips.askUser(BattleShips.java:319)
        at BattleShipsDriver.main(BattleShipsDriver.java:21)

Mark

[Mark Spritzler]

The other program that is an Applet, displays all the Buttons in the Applet window. But since you used GridLayout you can only have the Grid in the display, not Text or other Stuff, now you could nest Layouts like BorderLayout, and put a Panel with the GridLayout in that and place it in the center, and use North and South for other Panels for text and other stuff.

I'd read up on Swing and also not use an Applet.

Mark