[Ch6] StartupBust code, initial. (96d73cd9) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch6/GameHelper.java

0 → 100644

+89 −0

Changes for src/main/java/ch6/GameHelper.java: 89 added lines, 0 removed lines.
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		package ch6;

		import java.io.BufferedReader;
		import java.io.IOException;
		import java.io.InputStreamReader;
		import java.util.ArrayList;

		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> placeStartup(int comSize) {
		ArrayList<String> alphaCells = new ArrayList<String>();
		// 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 Startup to place
		int incr = 1; // set horizontal increment
		if ((comCount % 2) == 1) { // if odd Startup (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 Startup 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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src/main/java/ch6/Startup.java

+8 −4

Changes for src/main/java/ch6/Startup.java: 8 added lines, 4 removed lines.
Original line number	Diff line number	Diff line
		@@ -4,11 +4,14 @@ import java.util.ArrayList;

		public class Startup {
		private ArrayList<String> locationCells;
		// private int numOfHits = 0;
		// don't need to track this now
		private String name;

		public void setLocationCells(ArrayList<String> locs) {
		locationCells = locs;
		public void setLocationCells(ArrayList<String> loc) {
		locationCells = loc;
		}

		public void setName(String n) {
		name = n;
		}

		public String checkYourself(String userInput) {
		@@ -18,6 +21,7 @@ public class Startup {
		locationCells.remove(index);
		if (locationCells.isEmpty()) {
		result = "kill";
		System.out.println("Ouch! You sunk " + name + " : ( ");
		} else {
		result = "hit";
		} // end if

src/main/java/ch6/StartupBust.java

0 → 100644

+83 −0

Changes for src/main/java/ch6/StartupBust.java: 83 added lines, 0 removed lines.
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		package ch6;

		import java.util.ArrayList;

		public class StartupBust {

		private GameHelper helper = new GameHelper();
		private ArrayList<Startup> StartupsList = new ArrayList<Startup>();
		private int numOfGuesses = 0;

		private void setUpGame() {
		// first make some Startups and give them locations
		Startup one = new Startup();
		one.setName("poniez");
		Startup two = new Startup();
		two.setName("hacqi");
		Startup three = new Startup();
		three.setName("cabista");
		StartupsList.add(one);
		StartupsList.add(two);
		StartupsList.add(three);

		System.out.println("Your goal is to sink three Startups.");
		System.out.println("poniez, hacqi, cabista");
		System.out.println("Try to sink them all in the fewest number of guesses");

		for (Startup StartupToSet : StartupsList) {
		ArrayList<String> newLocation = helper.placeStartup(3);
		StartupToSet.setLocationCells(newLocation);
		} // close for loop
		} // close setUpGame method

		private void startPlaying() {
		while (!StartupsList.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"; // assume a miss until told otherwise

		for (int i = 0; i < StartupsList.size(); i++) {

		Startup StartupToTest = (Startup) StartupsList.get(i);
		result = StartupToTest.checkYourself(userGuess);

		if (result.equals("hit")) {

		break;
		}
		if (result.equals("kill")) {

		StartupsList.remove(i); // he's gone
		break;
		}

		} // close for

		System.out.println(result);
		}


		private void finishGame() {
		System.out.println("All Startups are dead! Your stock is now worthless");
		if (numOfGuesses <= 9) {
		System.out.println("It only took you " + numOfGuesses + " guesses. You get the Enron award!");
		} else {
		System.out.println("Took you long enough. " + numOfGuesses + " guesses.");
		System.out.println("Too bad you didn't get out before your options sank.");
		}
		}


		public static void main(String[] args) {
		StartupBust game = new StartupBust();
		game.setUpGame();
		game.startPlaying();
		}
		}
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