This is the code for the battle ship game created in this chapter:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | import java.util.ArrayList; public class DotCom { private ArrayList<String> locationCells; private String name; public void setLocationCells(ArrayList<String> loc) { locationCells = loc; } public void setName(String n) { //setter name = n; } public String checkYourself(String userInput) { String result = "miss"; int index = locationCells.indexOf(userInput); if (index >= 0) { locationCells.remove(index); if (locationCells.isEmpty()) { result = "kill"; System.out.println("Ouch! You sunk " + name + " : ( "); } else { result = "hit"; } // close if } // close if return result; } // close method } // close class |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | import java.util.ArrayList; public class DotComBust { private GameHelper helper = new GameHelper(); private ArrayList<DotCom> dotComsList = new ArrayList<DotCom>(); private int numOfGuesses = 0; private void setUpGame() { // first make some dot coms and give them locations DotCom one = new DotCom(); one.setName("Pets.com"); DotCom two = new DotCom(); two.setName("eToys.com"); DotCom three = new DotCom(); three.setName("Go2.com"); dotComsList.add(one); dotComsList.add(two); dotComsList.add(three); System.out.println("Your goal is to sink three dot coms."); System.out.println("Pets.com, eToys.com, Go2.com"); System.out.println("Try to sink them all in the fewest number of guesses"); for (DotCom dotComToSet : dotComsList) { ArrayList<String> newLocation = helper.placeDotCom(3); dotComToSet.setLocationCells(newLocation); } // close for loop } // close setUpGame method private void startPlaying() { while(!dotComsList.isEmpty()) { String userGuess = helper.getUserInput("Enter a guess"); checkUserGuess(userGuess); } // close while finishGame(); } // close startPlaying method private void checkUserGuess(String userGuess) { numOfGuesses++; String result = "miss"; for (DotCom dotComToTest : dotComsList) { result = dotComToTest.checkYourself(userGuess); if (result.equals("hit")) { break; } if (result.equals("kill")) { dotComsList.remove(dotComToTest); break; } } // close for System.out.println(result); } // close method private void finishGame() { System.out.println("All Dot Coms are dead! Your stock is now worthless."); if (numOfGuesses <= 18) { System.out.println("It only took you " + numOfGuesses + " guesses."); System.out.println(" You got out before your options sank."); } else { System.out.println("Took you long enough. "+ numOfGuesses + " guesses."); System.out.println("Fish are dancing with your options."); } } // close method public static void main(String[] args) { DotComBust game = new DotComBust(); game.setUpGame(); game.startPlaying(); } // close method } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | import java.io.*; import java.util.*; public class GameHelper { private static final String alphabet = "abcdefg"; private int gridLength = 7; private int gridSize = 49; private int[] grid = new int[gridSize]; private int comCount = 0; public String getUserInput(String prompt) { String inputLine = null; System.out.print(prompt + " "); try { BufferedReader is = new BufferedReader(new InputStreamReader(System.in)); inputLine = is.readLine(); if (inputLine.length() == 0) return null; } catch (IOException e) { System.out.println("IOException: " + e); } return inputLine.toLowerCase(); } public ArrayList<String> placeDotCom(int comSize) { ArrayList<String> alphaCells = new ArrayList<String>(); String[] alphacoords = new String[comSize]; // holds ‘f6’ type coords String temp = null; // temporary String for concat int[] coords = new int[comSize]; // current candidate coords int attempts = 0; // current attempts counter boolean success = false; // flag = found a good location ? int location = 0; // current starting location comCount++; // nth dot com to place int incr = 1; // set horizontal increment if ((comCount % 2) == 1) { // if odd dot com (place vertically) incr = gridLength; // set vertical increment } while (!success & attempts++ < 200) { // main search loop (32) location = (int) (Math.random() * gridSize); // get random starting point //System.out.print(“ try “ + location); int x = 0; // nth position in dotcom to place success = true; // assume success while (success && x < comSize) { // look for adjacent unused spots if (grid[location] == 0) { // if not already used coords[x++] = location; // save location location += incr; // try ‘next’ adjacent if (location >= gridSize) { // out of bounds - ‘bottom’ success = false; // failure } if (x > 0 && (location % gridLength == 0)) { // out of bounds - right edge success = false; // failure } } else { // found already used location // System.out.print(“ used “ + location); success = false; // failure } } } // end while int x = 0; // turn location into alpha coords int row = 0; int column = 0; // System.out.println(“\n”); while (x < comSize) { grid[coords[x]] = 1; // mark master grid pts. as ‘used’ row = (int) (coords[x] / gridLength); // get row value column = coords[x] % gridLength; // get numeric column value temp = String.valueOf(alphabet.charAt(column)); // convert to alpha alphaCells.add(temp.concat(Integer.toString(row))); x++; // System.out.print(“ coord “+x+” = “ + alphaCells.get(x-1)); } // System.out.println(“\n”); return alphaCells; } } |
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