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1 package As7BattleShip; Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: Runs the battleship game Input: ship placement board files and computer player type Output: Creates a JFrame that displays the battleship board, where ships are placed and where they've been hit. import java.io.file; import java.io.filenotfoundexception; public class BattleshipDriver { Main args Command line arguments public static void main(string args[]) { try { BattleshipBoard b; File boardfile = new File(args[0]); File opponentboardfile = new File(args[1]); b = new BattleshipBoard(boardFile); b.opponentboard(opponentboardfile); b.cpuplayer(); b.setvisible(true); catch (FileNotFoundException BattleshipException e) { System.out.println(e.getMessage()); System.exit(-1); package As7BattleShip; Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: Runs the battleship game Input: ship placement board files and computer player type Output: Creates a JFrame that displays the battleship board, where ships are placed and where they've been hit. Also announces winner. import java.awt.color; import java.awt.gridlayout; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.io.; import java.util.arraylist; import javax.swing.jframe; import javax.swing.joptionpane; import javax.swing.jpanel;

2 @SuppressWarnings("serial") public class BattleshipBoard extends JFrame { Static constant to indicate a board location is empty public static final char EMPTY = '.'; The 2D array representing the board private char board[][]; The 2D array representing the opponent's board private char oppboard[][]; The 2D array representing the CPU's FireButtons private FireButton fboppboard[][]; The 2D array representing the player's FireButtons private FireButton fbboard[][]; The number of battleships left private int numbattleshipsleft; The number of opponent's battleships left private int numoppbattleshipsleft; The ID of the current ship being placed private int currentshipid; The number of rows private int numrows; The number of columns private int numcols; Maintains information about the shots taken by each ship public ArrayList<Integer> shipinfo; Maintains information about the shots taken by each of the opponent's ship public ArrayList<Integer> opponentshipinfo; FireButtons for opponent private FireButton fb; FireButtons for player private FireButton fbp;

3 Creates the main panel that will hold the 2 boards JPanel mainpanel = new JPanel(new GridLayout(0, 2)); Creates the player's board panel private JPanel playerpanel; Creates the opponent's board panel private JPanel opponentpanel; Creates listener objects for the FireButtons private ButtonListener listener; CPU type public CPU cpu; Constructor for the Battleship Board. File must have 10 lines, with exactly 10 characters per line. '.' represents EMPTY. A unique number (0, 1, 2, 3, or 4) will represent each boardfile a text file with a 10x10 character grid, representing a battleship FileNotFoundException if the board file is not richmaja public BattleshipBoard(File boardfile) throws FileNotFoundException { this.numrows = 10; this.numcols = 10; this.board = new char[numcols][numrows]; this.fbboard = new FireButton[numCols][numRows]; this.listener = new ButtonListener(); this.shipinfo = new ArrayList<>(); this.numbattleshipsleft = 5; //Add 5 entries to shipinfo for (int i = 0; i < 5; i++) { shipinfo.add(0); //create the board frame setsize(700, 400); settitle("battleship Board"); setdefaultcloseoperation(exit_on_close); this.add(mainpanel); try { if (!boardfile.exists()) { throw new FileNotFoundException("Error Reading: " + boardfile.getname()); //Confirm file worked System.out.println("Reading " + boardfile.getname()); //create player board this.playerpanel = new JPanel(new GridLayout(numRows, numcols));

4 playerpanel.setborder(javax.swing.borderfactory.createtitledborder(null, "Player Board", javax.swing.border.titledborder.left, javax.swing.border.titledborder.top)); mainpanel.add(playerpanel); try (FileReader fr = new FileReader(boardFile); BufferedReader br = new BufferedReader(fr)) { String line; int linecounter = 0; while ((line = br.readline())!= null) { for (int i = 0; i < line.length(); i++) { char currentcharacter = line.charat(i); board[i][linecounter] = currentcharacter; linecounter++; //add the file contents to the board and create the fire buttons for (int c = 0; c < this.numcols; c++) { for (int r = 0; r < this.numrows; r++) { try { this.fbp = new FireButton(c, r); this.fbp.addactionlistener(this.listener); if (!String.valueOf(board[r][c]).equals(String.valueOf(BattleshipBoard.EMPTY))) { this.fbp.settext(string.valueof(board[r][c])); fbp.setbackground(color.yellow); else { fbp.settext(""); fbboard[r][c] = this.fbp; playerpanel.add(fbp); //disable player's board fbp.setenabled(false); //set the margins so the buttons are together fbp.setmargin(new java.awt.insets(0, 0, 0, 0)); //set the ship number into the ship array int shipidval = Integer.parseInt(board[c][r] + ""); shipinfo.set(shipidval, shipinfo.get(shipidval) + 1); catch (NumberFormatException e) { catch (IOException e) { System.out.println("Error: " + e.getmessage()); //print the board to confirm //print(); System.out.println(shipInfo); Builds the opponent's board. File must have 10 lines, with exactly 10 characters per line. '.' represents EMPTY. A unique number (0, 1, 2, 3, or 4) will represent each boardfile a text file with a 10x10 character grid, representing a

5 battleship FileNotFoundException if the board file is not found public void opponentboard(file boardfile) throws FileNotFoundException { this.numrows = 10; this.numcols = 10; this.oppboard = new char[numcols][numrows]; this.fboppboard = new FireButton[numCols][numRows]; this.listener = new ButtonListener(); this.opponentshipinfo = new ArrayList<>(); //this.shipinfo = new ArrayList<>(); this.numoppbattleshipsleft = 5; //Add 5 entries to shipinfo for (int i = 0; i < 5; i++) { opponentshipinfo.add(0); //shipinfo.add(0); try { if (!boardfile.exists()) { throw new FileNotFoundException("Error Reading: " + boardfile.getname()); System.out.println("Reading " + boardfile.getname()); //Create the opponent panel and add it to the main panel this.opponentpanel = new JPanel(new GridLayout(numRows, numcols)); mainpanel.add(opponentpanel); opponentpanel.setborder(javax.swing.borderfactory.createtitledborder(null, "Opponent Board", javax.swing.border.titledborder.left, javax.swing.border.titledborder.top)); //Read the file to create the board and where to place the ships try (FileReader fr = new FileReader(boardFile); BufferedReader br = new BufferedReader(fr)) { String line; int linecounter = 0; while ((line = br.readline())!= null) { for (int i = 0; i < line.length(); i++) { char currentcharacter = line.charat(i); oppboard[i][linecounter] = currentcharacter; linecounter++; //fill the board with the FireButtons for (int c = 0; c < this.numcols; c++) { for (int r = 0; r < this.numrows; r++) { try { this.fb = new FireButton(r, c); this.fb.addactionlistener(this.listener); //place the ships on the board or empty space where no ship is if (!String.valueOf(oppboard[r][c]).equals(String.valueOf(BattleshipBoard.EMPTY))) { this.fb.setname(string.valueof(oppboard[r][c])); else { fb.setname(""); this.fb.setenabled(true); this.fb.setmargin(new java.awt.insets(0, 0, 0, 0)); //add the FB to the FB board this.fboppboard[r][c] = this.fb; //add the panel to the board

6 1); opponentpanel.add(this.fb); int shipidval = Integer.parseInt(oppboard[c][r] + ""); opponentshipinfo.set(shipidval, opponentshipinfo.get(shipidval) + catch (NumberFormatException e) { catch (IOException e) { System.out.println("Error: " + e.getmessage()); //print(); System.out.println(opponentshipInfo); Constructs the CPU player cpuplayer Systematic player for "s" and Random player for BattleshipException is neither "s" or "r" //public CPU CPUplayer(String cpuplayer) throws BattleshipException { public CPU CPUplayer() throws BattleshipException { Object[] options = {"Systematic","Random"; int result = JOptionPane.showOptionDialog(null, "Select the type of CPU you would like to play against", "Battleship", JOptionPane.YES_NO_OPTION, JOptionPane.PLAIN_MESSAGE,null,options,options[0]); if (result == 0) { System.out.println("Systematic opponent selected"); return cpu = new SystematicCPU(); else if (result == 1) { System.out.println("Random opponent selected"); return cpu = new RandomCPU(); else { throw new BattleshipException("Incorrect computer player argument"); if (cpuplayer.equalsignorecase("s")) { System.out.println("Systematic opponent"); return cpu = new SystematicCPU(); else if (cpuplayer.equalsignorecase("r")) { System.out.println("Random opponent"); return cpu = new RandomCPU(); else { throw new BattleshipException("Incorrect computer player argument"); //return cpu = new SystematicCPU(); Getter for the number of rows in the The number of rows in the Battleship board public int getnumrows() { return this.numrows; Getter for the number of columns in the The number of columns in the Battleship board public int getnumcols() { return this.numcols;

7 Gets the number of Battleships The number of battleships left public int getnumbattleshipsleft() { return this.numbattleshipsleft; Gets the number of opponent's Battleships The number of battleships left public int getoppnumbattleshipsleft() { return this.numoppbattleshipsleft; Checks if the cell is col The row The true if the cell is occupied public boolean isoccupied(int col, int row) { if (row >= 0 && row < getnumrows() && col >= 0 && col < getnumcols()) { return board[col][row]!= EMPTY; return false; Returns the char value at a certain row and column of the col The column on which the cell row The row on which the cell the char value at a certain row and column of the board public char getcellcontent(int col, int row) { if (row >= 0 && row < getnumrows() && col >= 0 && col < getnumcols()) { return this.board[col][row]; return EMPTY; public char getoppcellcontent(int col, int row) { if (row >= 0 && row < getnumrows() && col >= 0 && col < getnumcols()) { return this.oppboard[col][row]; return EMPTY; Fires a shot at an opponent's col The col coordinate of the row The row coordinate of the true if an enemy battleship is hit, false otherwise. If you fire twice at the same spot and a battleship was at that spot, this method returns true both IndexOutOfBoundsException if row or col are out of bounds public boolean fireshot(int col, int row) throws IndexOutOfBoundsException {

8 if (this.getoppcellcontent(col, row)!= BattleshipBoard.EMPTY) { int shipid = Character.digit(this.getOppCellContent(col, row), 10); Integer shotsleft = this.opponentshipinfo.get(shipid); shotsleft--; if (shotsleft == 0) { this.numoppbattleshipsleft--; this.opponentshipinfo.set(shipid, new Integer(shotsLeft)); System.out.println("Hit ship: " + shipid + " Shots left: " + shotsleft + " Ships left:" + this.numoppbattleshipsleft); // Decide winner and alert player if (isgameover()) { endgame(0); else { //Call opponent's shot cpushot(cpu.cpucol(), cpu.cpurow()); //System.out.println("Hit at " + col + ", " + row); return true; else { //MISS //System.out.println("Miss at " + col + ", " + row); //Call opponent's shot cpushot(cpu.cpucol(), cpu.cpurow()); return false; Fires a shot at a player's col The col coordinate of the row The row coordinate of the true if an enemy battleship is hit, false IndexOutOfBoundsException if row or col are out of bounds public boolean cpushot(int col, int row) throws IndexOutOfBoundsException { this.fbp = fbboard[col][row]; if (fbp.getbackground().equals(color.blue) fbp.getbackground().equals(color.red)) { System.out.println("Shooting again"); cpushot(cpu.cpucol(), cpu.cpurow()); return false; System.out.println("CPU shooting at " + col + ", " + row); if (this.getcellcontent(col, row)!= BattleshipBoard.EMPTY) { int shipid = Character.digit(this.getCellContent(col, row), 10); Integer shotsleft = this.shipinfo.get(shipid); shotsleft--; if (shotsleft == 0) { this.numbattleshipsleft--; this.shipinfo.set(shipid, new Integer(shotsLeft)); System.out.println("CPU Hit ship: " + shipid + " Shots left: " + shotsleft + " Ships left:" + this.numbattleshipsleft); if ((fbp.gettext().matches("[0-9]")) this.fbp.getbackground().equals(color.yellow)) { //System.out.println("Hit at " + col.getcolumn() + ", " + row.getrow());

9 fbp.settext("h"); //if hit twice, skip the fireshot method fbp.setbackground(color.red); //Decide winner and alert player if (isgameover()) endgame(1); return true; else { if (fbp.gettext().equals("")) { fbp.setbackground(color.blue); //System.out.println("Miss at " + col.getcolumn() + ", " + row.getrow()); fbp.settext("m"); System.out.println("CPU Miss at " + col + ", " + row); return false; ButtonListener class for FireButtons When button is pressed, check if it's been hit before and skip if it has. Otherwise if miss, change to M and make blue, if hit change to H and make red public class ButtonListener implements ActionListener //what cell did the button hit public void actionperformed(actionevent arg0) { fb = (FireButton) arg0.getsource(); Cell col = fb.getcell(); Cell row = fb.getcell(); //if missed or shot at twice, skip the fireshot method if (fb.getbackground().equals(color.blue) fb.getbackground().equals(color.red)) { return; //miss if (fb.getname().equals("")) { //System.out.println("Miss at " + col.getcolumn() + ", " + row.getrow()); fb.setbackground(color.blue); fb.settext("m"); fireshot(col.getcolumn(), row.getrow()); //hit if (fb.getname().matches("[0-9]")) { //System.out.println("Hit at " + col.getcolumn() + ", " + row.getrow()); //int shipid = Integer.parseInt(fb.getName()); fb.settext("h"); fb.setbackground(color.red); fireshot(col.getcolumn(), row.getrow()); Prints the board, for testing only public void print() {

10 for (int r = 0; r < this.numrows; r++) { StringBuilder sb = new StringBuilder(this.numCols); for (int c = 0; c < this.numcols; c++) { sb.append(this.board[c][r]); System.out.println(sb.toString()); Check if all the ships on either player or CPU board have been sunk Returns true if game is over, false true if game is over, false otherwise public boolean isgameover() { if ((this.numbattleshipsleft <= 0) (this.numoppbattleshipsleft <= 0)) { return true; else { return false; public void resetgame() { this.numbattleshipsleft = 5; this.numoppbattleshipsleft = 5; this.shipinfo.clear(); this.opponentshipinfo.clear(); for (int i = 0; i < 5; i++) { shipinfo.add(0); opponentshipinfo.add(0); //add the file contents to the board and create the fire buttons for (int c = 0; c < this.numcols; c++) { for (int r = 0; r < this.numrows; r++) { try { this.fbp = fbboard[r][c]; if (!String.valueOf(board[r][c]).equals(String.valueOf(BattleshipBoard.EMPTY))) { this.fbp.settext(string.valueof(board[r][c])); fbp.setbackground(color.yellow); else { fbp.settext(""); fbp.setbackground(null); fbboard[r][c] = this.fbp; //set the ship number into the ship array int shipidval = Integer.parseInt(board[c][r] + ""); shipinfo.set(shipidval, shipinfo.get(shipidval) + 1); catch (NumberFormatException e) { cpu.setcpucol(-1);

11 cpu.setcpurow(-1); //fill the board with the FireButtons for (int c = 0; c < this.numcols; c++) { for (int r = 0; r < this.numrows; r++) { try { this.fb = fboppboard[r][c]; this.fb.settext(""); this.fb.setbackground(null); //place the ships on the board or empty space where no ship is if (!String.valueOf(oppboard[r][c]).equals(String.valueOf(BattleshipBoard.EMPTY))) { this.fb.setname(string.valueof(oppboard[r][c])); else { fb.setname(""); this.fb.setenabled(true); //this.fb.setmargin(new java.awt.insets(0, 0, 0, 0)); int shipidval = Integer.parseInt(oppboard[c][r] + ""); opponentshipinfo.set(shipidval, opponentshipinfo.get(shipidval) + 1); catch (NumberFormatException e) { Handles end of game boolean - true for player win, false for CPU 0 if play again, 1 if no and exit public void endgame(int winner) { String winnermsg; if (winner == 0) winnermsg = "You win! "; else winnermsg = "You lose. "; //show dialog and ask to play again int result = JOptionPane.showConfirmDialog(null, winnermsg + "Do you want to play again?", "Game Over", JOptionPane.YES_NO_OPTION, JOptionPane.PLAIN_MESSAGE); if (result == 0) resetgame(); else System.exit(0); package As7BattleShip; Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: Manages the 2 CPU players: RandomCPU and SystematicCPU public class CPU { int numrow = 10; // number of rows for the board int numcol = 10;// number of columns for the board

12 //set back starting pos 1 column/row from start to make the methods easier for SystematicCPU int currentcol = -1; int currentrow = -1; Default method to get column to shoot at public int CPUcol() { return currentcol; Default method to get row to shoot at public int CPUrow() { return currentrow; public void setcpucol(int col) { currentcol = col; public void setcpurow(int row) { currentrow = row; package As7BattleShip; Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: Cell defines the cells for FireButton public class Cell { private int row; private int col; public Cell(int col, int row){ this.row = row; this.col = col; public int getrow(){ return this.row; public int getcolumn(){ return this.col; package As7BattleShip; Program: BattleshipBoard.java

13 Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: FireButtons are used to select target cells on boards import public class FireButton extends JButton { private Cell cell; public FireButton(int col, int row){ cell = new the cell the button is at public Cell getcell(){ return this.cell; package As7BattleShip; Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: RandomCPU inherits the CPU class. The random player randomly selects a position on the board and shoots at it. If the player has already shot that location, the player picks a different location and shoots at it. public class RandomCPU extends CPU { public RandomCPU() { super(); Select a random public int CPUcol() { currentcol = (int) (Math.random()(numCol)); return currentcol; Select a random public int CPUrow() { currentrow = (int) (Math.random()(numRow)); return currentrow; package As7BattleShip;

14 Program: BattleshipBoard.java Author: Kevin Nider Date: 11/18/12 Description: Assignment 7: SystematicCPU inherits the CPU class. The systematic player randomly starts at (0,0) and moves across the board and down once it reaches the end. public class SystematicCPU extends CPU { public SystematicCPU() { super(); Start at row one, when column starts over, start on the next public int CPUrow() { if (currentcol == 0) { currentrow++; else { return currentrow; return currentrow; Start at column 0 and add one until the end, then start at public int CPUcol() { if (currentcol < numcol-1) { currentcol++; else { currentcol = 0; return currentcol;

SampleApp.java. Page 1

SampleApp.java. Page 1 SampleApp.java 1 package msoe.se2030.sequence; 2 3 /** 4 * This app creates a UI and processes data 5 * @author hornick 6 */ 7 public class SampleApp { 8 private UserInterface ui; // the UI for this program