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GameHelper.java

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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 temp = null;

int [] coords = new int [comSize];

int attempts = 0;

boolean success = false;

int location = 0;

comCount++;

int incr = 1;

if((comCount % 2) == 1) {

incr = gridLength;

}

while( !success & attempts++ < 200) {

location = (int) (Math.random() * gridSize);

//System.out.print("try" + location);

int x = 0; // nth position in dotcom to place;

success= true;

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;

}

if(x > 0 && (location % gridLength == 0)) { // out of bounds - right edge

success = false;

}

} else { // found already used location

//System.out.print("used " + location);

success = false;

} // mark master grid pts. as 'used'

}

}

int x = 0; // turn location into alpha coords

int row = 0;

int column = 0;

while(x < comSize) {

grid[coords[x]] = 1; // get numeric column value

row = (int) (coords[x] / gridLength); // get row value

column = coords[x] % gridLength;

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)); // tells exactly where the dotCom is located

}

return alphaCells;

}

}