This is the Game of Life in JAVA.

1) Using the Java Swing API, create a graphical user interface for your Game of Life application.

2) Only the GameOfLife.java and the GoLDisplay.java should have to change.

3) Add/update Javadoc comments as needed and re-generate Javadoc documentation for the program using the Javadoc utility

*******GAME OF LIFE***********

import java.io.*; import java.util.Scanner;

public class GameOfLife {

/** * Creates a new instance of GameOfLife. */ public GameOfLife() { }

/** * @param args the command line arguments */ public static void main(String[] args) { // Create objects required for the game loop GoLBoard myBoard = new GoLBoard(); GoLDisplay out = new GoLDisplay(); Scanner in = new Scanner(System.in); if (args.length > 0) { if (args[0].equals("extended")) { myBoard = new GoLBoard(new GoLExtRandomInitializer()); } else { myBoard = new GoLBoard(new GoLRandomInitializer()); } } else { myBoard = new GoLBoard(new GoLRandomInitializer()); }

out.displayBoard(myBoard);

while (in.next().charAt(0)=='n'){

myBoard.nextRound(); out.displayBoard(myBoard);

} } }

******GameOfLIfeBoard*********

//Implements the functions of the Game of Life board public class GoLBoard {

//Internal storage for board data protected GoLCell[][] boardData;

private int births; //counters for births, deaths and rounds private int deaths; // private int rounds = 0; //

//Default constructor; uses the RandomInitializer public GoLBoard() {

this(new GoLRandomInitializer());

}

//Constructor that allows an arbitrary initializer public GoLBoard(GoLInitializer myInitializer) {

boardData = myInitializer.getCellArray(); }

//Reset the board public GoLBoard reset() {

return reset(new GoLRandomInitializer());

}

//Reset with an arbitrary initializer public GoLBoard reset(GoLInitializer myInitializer) {

boardData = myInitializer.getCellArray(); return this; }

//Updates the board for the next round by calling the //updateCell method of the individual cells, passing a //GoLNeighborhood to them. Returns the updated board. public GoLBoard nextRound() {

GoLBoard tempBoard = this.copyBoard(); births = 0; deaths = 0;

for (int i=0; i<20; i++) {

for (int j=0; j<20; j++) {

boolean wasAlive = boardData[i][j].isAlive(); boolean nowAlive = tempBoard.getCell(i,j).updateCell(getNeighborhood(i,j)); deaths += (wasAlive && !nowAlive)?1:0; births += (!wasAlive && nowAlive)?1:0; }

}

this.boardData = tempBoard.boardData; rounds++; return this; }

//Gets a cell from the board public GoLCell getCell(int x, int y) {

return boardData[x][y];

}

//Copies the current board public GoLBoard copyBoard() {

GoLBoard tempBoard = new GoLBoard(); for (int i=0; i<20; i++) {

for (int j=0; j<20; j++) {

tempBoard.boardData[i][j] = new GoLCell(this.boardData[i][j].isAlive()); }

} return tempBoard;

}

public int getCurrentRound() { return rounds; }

public int getBirths() { return births; }

public int getDeaths() { return deaths; }

//private utility function to generate the neigborhoods private GoLNeighborhood getNeighborhood(int x, int y) {

GoLCell[][] tempArray = new GoLCell[3][3];

tempArray[0][0] = ((x>0)&&(y>0))?boardData[x-1][y-1]:(new GoLCell(false)); tempArray[1][0] = (y>0)?boardData[x][y-1]:(new GoLCell(false)); tempArray[2][0] = ((x<19)&&(y>0))?boardData[x+1][y-1]:(new GoLCell(false)); tempArray[0][1] = ((x>0))?boardData[x-1][y]:(new GoLCell(false)); tempArray[1][1] = boardData[x][y]; tempArray[2][1] = ((x<19))?boardData[x+1][y]:(new GoLCell(false)); tempArray[0][2] = ((x>0)&&(y<19))?boardData[x-1][y+1]:(new GoLCell(false)); tempArray[1][2] = (y<19)?boardData[x][y+1]:(new GoLCell(false)); tempArray[2][2] = ((x<19)&&(y<19))?boardData[x+1][y+1]:(new GoLCell(false));

return new GoLNeighborhood(tempArray);

}

}

******GameOfLifeCell**********

//Implements the business logic for an individual cell in the Game of Life

public class GoLCell {

//Private variable to hold the cell state private boolean cellState;

//Constructor: Takes the initial state of the cell as an argument public GoLCell(boolean cellState) {

//Sets initial state to value passed to constructor this.cellState = cellState;

}

//Method updates the state of the cell based on the provided GoLNeigborhood public boolean updateCell(GoLNeighborhood myNeighborhood){

//Add up the number of live neighbors int liveNeighbors = (myNeighborhood.getCell(0,0).isAlive()?1:0) + (myNeighborhood.getCell(1,0).isAlive()?1:0) + (myNeighborhood.getCell(2,0).isAlive()?1:0) + (myNeighborhood.getCell(0,1).isAlive()?1:0) + (myNeighborhood.getCell(2,1).isAlive()?1:0) + (myNeighborhood.getCell(0,2).isAlive()?1:0) + (myNeighborhood.getCell(1,2).isAlive()?1:0) + (myNeighborhood.getCell(2,2).isAlive()?1:0);

if ((liveNeighbors == 3) || ((liveNeighbors == 2) && cellState)) {

//The cell is alive cellState = true;

} else {

//The cell is dead cellState = false; }

return cellState;

}

//accessor for the state of the cell public boolean isAlive(){

return cellState; } }

******GameOfLifeDisplay*******

import java.io.*;

public class GoLDisplay {

public GoLDisplay() { }

public void displayBoard(GoLBoard myBoard) {

System.out.println("Round: " + myBoard.getCurrentRound() + " Births: " + myBoard.getBirths() + " Deaths: " + myBoard.getDeaths()); System.out.println("------------------------------------------------------");

for (int i=0; i<20; i++) {

String tempStr = "";

for (int j=0; j<20; j++) {

if (myBoard.getCell(i,j).isAlive()) {

tempStr = tempStr + "O ";

} else {

tempStr = tempStr + " "; } }

System.out.println(tempStr); }

}

}

********GameOfLifeExtRandomInitializer*******

import java.util.*;

public class GoLExtRandomInitializer implements GoLInitializer {

//Instance Variables private final int NUM_ROWS = 20; private final int NUM_COLUMNS = 20; private GoLCell[][] gameBoard = new GoLCell[NUM_ROWS][NUM_COLUMNS];

//Constructor

//Creates new GoLExtRandomInitializer with a random seed public GoLExtRandomInitializer() { Random randomLifeOrDeath = new Random(); Random randomCellType = new Random(); int cellType = -1;

//Give life to random cells in the board for (int row = 0; row < this.NUM_ROWS; row++) { for (int column = 0; column < this.NUM_COLUMNS; column++) { cellType = randomCellType.nextInt(3); if (cellType == 0) this.gameBoard[row][column] = new GoLCell(randomLifeOrDeath.nextBoolean()); if (cellType == 1) this.gameBoard[row][column] = new GoLStrongCell(randomLifeOrDeath.nextBoolean()); if (cellType == 2) this.gameBoard[row][column] = new GoLWeakCell(randomLifeOrDeath.nextBoolean()); } } }

public GoLExtRandomInitializer(long seed) { Random randomLifeOrDeath = new Random(seed); Random randomCellType = new Random(seed); int cellType = -1;

//Give life to random cells in the board for (int row = 0; row < this.NUM_ROWS; row++) { for (int column = 0; column < this.NUM_COLUMNS; column++) { cellType = randomCellType.nextInt(3); if (cellType == 0) { this.gameBoard[row][column] = new GoLCell(randomLifeOrDeath.nextBoolean()); } else if (cellType == 1) { this.gameBoard[row][column] = new GoLStrongCell(randomLifeOrDeath.nextBoolean()); } else if (cellType == 2) { this.gameBoard[row][column] = new GoLWeakCell(randomLifeOrDeath.nextBoolean()); } else { System.out.println("error!"); } } } }

@Override public GoLCell[][] getCellArray() { // TODO Auto-generated method stub return null; } }

******GameOfLifeInitializer*********

//Interface for initializing the board public interface GoLInitializer {

//Gets the initial cell array to initialize the board public GoLCell[][] getCellArray(); }

******GameOfLIfeNeighborhood*********

//Implements the concept of a cell neighborhood public class GoLNeighborhood {

//hold the neigborhood private GoLCell[][] cellArray;

//Constructor: sets the neigborhood public GoLNeighborhood(GoLCell[][] cellNeighbors) {

cellArray = cellNeighbors;

}

//retrieves a cell from the neigborhood public GoLCell getCell(int x, int y) {

return cellArray[x][y];

}

}

*******GameOfLIfeRandomInitializer********

import java.util.Random;

//Randomly initializes a board public class GoLRandomInitializer implements GoLInitializer {

//Stores the randomized contents private GoLCell[][] myBoard = new GoLCell[20][20];

//Creates a new set of board data using a random seed public GoLRandomInitializer() {

//Gets a new RNG Random myRNG = new Random();

//Loops through the array of data and randomly creates a cell for (int i = 0; i<20; i++) { for (int j = 0; j<20; j++) {

myBoard[i][j] = new GoLCell(myRNG.nextBoolean());

}

}

}

//Creates a new set of board data using a given long seed public GoLRandomInitializer(long seed) {

//Gets a new RNG Random myRNG = new Random(seed);

//Loops through the array of data and randomly creates a cell for (int i = 0; i<20; i++) { for (int j = 0; j<20; j++) {

myBoard[i][j] = new GoLCell(myRNG.nextBoolean());

}

}

}

public GoLCell[][] getCellArray() {

return myBoard; }

}

**********GameOfLifeStrong Cell**********

//GoLStrongCell.java import java.util.*;

public class GoLStrongCell extends GoLCell {

//Constructor public GoLStrongCell(boolean cellStatus) { super(cellStatus); }

//Method

//Updates cell using myNeighborhood and returns true if alive and false if dead public boolean updateCell(GoLNeighborhood myNeighborhood) { boolean stateOfCell = false; int numAlive = 0;

for (int row = 0; row < 3; row++) { for (int column = 0; column < 3; column++) { try { if (myNeighborhood.getCell(row, column).isAlive()) numAlive++; } catch (NullPointerException e) {} } }

//Check current state of cell stateOfCell = myNeighborhood.getCell(1, 1).isAlive();

//Apply rules to neighbors if (stateOfCell) { numAlive--; if (numAlive < 0 || numAlive > 5) stateOfCell = false; } else { if (numAlive == 2 || numAlive == 3) stateOfCell = true; }

return stateOfCell; } }

********GameOfLifeWeakCell*********

import java.util.*; public class GoLWeakCell extends GoLCell { // Constructor public GoLWeakCell(boolean cellStatus) { super(cellStatus); } // Method // Updates cell using myNeighborhood and returns true if alive and false if dead public boolean updateCell(GoLNeighborhood myNeighborhood) { boolean stateOfCell = false; int numAlive = 0;

for (int row = 0; row < 3; row++) { for (int column = 0; column < 3; column++) { try { if (myNeighborhood.getCell(row, column).isAlive()) numAlive++; } catch (NullPointerException e) {} } }

// Checks current state of cell stateOfCell = myNeighborhood.getCell(1, 1).isAlive();

// Apply rules to neighbors if (stateOfCell) { numAlive--; if (numAlive != 3 || numAlive != 4) stateOfCell = false; } else { if (numAlive == 4) stateOfCell = true; }

return stateOfCell; } }