[Java] Mijn eerste programma: Tic Tac Toe

[uppie8374]

Korte inleiding: Vanaf 1 februari doe ik een carriere-switch naar de IT. Mij is gevraagd om voor die tijd mijn OCA te halen. Hierbij kreeg ik wat tips, zoals eerst een boek lezen en wanneer je Tic Tac Toe kan maken, kun je aan het OCA boek beginnen. Daarbij was het verstandig om niet met een IDE te werken om daadwerkelijk alles zelf te moeten doen en leren. Nou goed, het boek is uit en het was tijd voor Tic Tac Toe. Voor het geheel gebruik ik Context (http://www.contexteditor.org/index.php).

Tic Tac Toe is zichtbaar en er verschijnt een X op de button zodra ik een button aanklik. Daar houdt het echter op. Dit zijn mijn classen:

cell

Java:

import javafx.scene.control.Button;

public class cell extends Button{
  //int length;                //length of all sides
  private String state;              // X, O, or unset ""
  
  //constructor
  public cell(){
    super();
    state = "";
    //standard length
    //length = 100;
  }

  public boolean isSet(){
    if(!state.equals("")){
      return true;
    }
    return false;
  }

  public void setState(String x){
    state = x;
  }

  public String getState(){
    return state;
  }
}

board

Java:

public class board{
  public cell[][] board;

  //constructor
  public board(){
    board = new cell[3][3];
    for(int x = 0; x<3; x++){
      for(int y = 0; y<3; y++){
        //creates 9 cells with empty states
        board[x][y]= new cell("");
      }
    }
  }

  // checks if cells at row Y have the same state
  boolean checkRow(int y){
    //isSet check for all cells
    for(int x = 0; x<3; x++){
      if(!board[x][y].isSet()){
        return false;
      }
    }
    //if all cells are set, check for win-condition
    if(  board[0][y].getState().equals( board[1][y].getState() ) && board[1][y].getState().equals(board[2][y].getState())    ){
      return true;
    }
    return false;
  }

  // checks if cells at column X have the same state
  boolean checkColumn(int x){
    //isSet check for all cells
    for(int y = 0; y<3; y++){
      if(!board[x][y].isSet()){
        return false;
      }
    }
    //if all cells are set, check for win-condition
    if(  board[x][0].getState().equals( board[x][1].getState() ) && board[x][1].getState().equals(board[x][2].getState())    ){
      return true;
    }
    return false;
  }

  boolean checkDiagonals(){
    boolean check1 = true;
    boolean check2 = true;
    // diagonal 1 (top left, bottom right) isSet check
    for(int i = 0; i<3; i++){
      if(!board[i][i].isSet()){
        check1 = false;
      }
    }
    //if all cells are set, check for win-condition
    if(check1){
      if( board[0][0].getState().equals( board[1][1].getState() ) && board[1][1].getState().equals(board[2][2].getState())    ){
        return check1;
      }
    }
    // diagonal 2 (bottom left, top right) isSet check (only if diagonal 1 didn't have the win-condition
    for(int i = 0; i<3; i++){
      for(int j = 2; j>=0; j--){
        if(!board[i][j].isSet()){
          check2 = false;
        }
      }
    }
    //if all cells are set, check for win-condition
    if(check2){
      if( board[0][2].getState().equals( board[1][1].getState() ) && board[1][1].getState().equals(board[2][0].getState())    ){
        return check2;
      }
    }
    // no diagonal had a win-condition
    return false;
  }

  public boolean checkBoard(){
    if(checkRow(0) || checkRow(1) || checkRow(2) || checkColumn(0) || checkColumn(1) || checkColumn(2) || checkDiagonals()){
      return true;
    }
    return false;
  }
}

player

Java:

class player{
 private int number;
 private String userSymbol;
 
 public player(String u){
   userSymbol = u;
 }

 public void setNumber(int n){
   number = n;
 }
 public int getNumber(){
   return number;
 }
 public void setUserSymbol(String s){
   userSymbol = s;
 }
 public String getUserSymbol(){
   return userSymbol;
 }
}

game

Java:

/* My own Tic-Tac-Toe game.
 */
 
import javafx.application.*;
import javafx.scene.*;
import javafx.stage.*;
import javafx.scene.layout.*;
import javafx.scene.control.*;
import javafx.event.*;
import javafx.geometry.*;

public class game extends Application{
  boolean isPlayer1 = true;
  boolean finished = false;
  
  public static void main(String[] args){

    //start the JavaFX application by calling launch()
    launch(args);
  }
  
  // override the start() method
  public void start(Stage myStage){
    board gameBoard = new board();
    player player1 = new player("X");
    player player2 = new player("O");
    player currentPlayer;


    if(isPlayer1){
      currentPlayer = player1;
    }
    else{
      currentPlayer = player2;
    }
    
    // give the stage a title
    myStage.setTitle("Tic-Tac-Toe");
    // use a flowpane for the root node. In this case,
    // vertical and horizontal gaps of 10
    GridPane rootNode = new GridPane();

    // center the controls in the scene
    rootNode.setAlignment(Pos.CENTER);
    // create a scene
    Scene myScene = new Scene(rootNode, 340, 340);
    // set the scene on the stage
    myStage.setScene(myScene);

    // handle the action events for the cell-buttons
      gameBoard.board[0][0].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[0][0].setText(currentPlayer.getUserSymbol());
            gameBoard.board[0][0].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[0][1].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[0][1].setText(currentPlayer.getUserSymbol());
            gameBoard.board[0][1].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[0][2].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[0][2].setText(currentPlayer.getUserSymbol());
            gameBoard.board[0][2].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[1][0].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[1][0].setText(currentPlayer.getUserSymbol());
            gameBoard.board[1][0].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[1][1].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[1][1].setText(currentPlayer.getUserSymbol());
            gameBoard.board[1][1].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[1][2].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[1][2].setText(currentPlayer.getUserSymbol());
            gameBoard.board[1][2].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[2][0].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[2][0].setText(currentPlayer.getUserSymbol());
            gameBoard.board[2][0].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[2][1].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[2][1].setText(currentPlayer.getUserSymbol());
            gameBoard.board[2][1].setState(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });
      gameBoard.board[2][2].setOnAction(new EventHandler<ActionEvent>(){
        public void handle(ActionEvent ae){
          if(!finished){
            gameBoard.board[2][2].setText(currentPlayer.getUserSymbol());
            gameBoard.board[2][2].setText(currentPlayer.getUserSymbol());
            if(gameBoard.checkBoard()){
              finished = true;
              System.out.print(currentPlayer.getUserSymbol() + " has won!");
            }
            else{
              isPlayer1 = !isPlayer1;
            }
          }
        }
      });

    // add the label and buttons to the scene graph
    rootNode.add(gameBoard.board[0][0],0, 0, 1, 1);
    rootNode.add(gameBoard.board[0][1],0, 1, 1, 1);
    rootNode.add(gameBoard.board[0][2],0, 2, 1, 1);
    rootNode.add(gameBoard.board[1][0],1, 0, 1, 1);
    rootNode.add(gameBoard.board[1][1],1, 1, 1, 1);
    rootNode.add(gameBoard.board[1][2],1, 2, 1, 1);
    rootNode.add(gameBoard.board[2][0],2, 0, 1, 1);
    rootNode.add(gameBoard.board[2][1],2, 1, 1, 1);
    rootNode.add(gameBoard.board[2][2],2, 2, 1, 1);

    //show the stage and its scene
    myStage.show();
  }
}

Om het geheel te testen schreef begon ik met een test class voor de cell class... maar daar ging het ook al in de problemen en nu weet ik het even niet meer. Al mijn zoektochten op Google (javafx extend button class e.d.) leiden niet tot een oplossing.

Test

Java:

// test class voor alle andere classen

import javafx.application.*;
import javafx.scene.*;
import javafx.stage.*;
import javafx.scene.layout.*;
import javafx.scene.control.*;
import javafx.event.*;
import javafx.geometry.*;


class Test{
  public static void main(String[] args){

    //maak een cell
    cell testCell = new cell();
    System.out.println("test cell aangemaakt");

    boolean bool1 = testCell.isSet();
    System.out.println("Is test cell geSet?: "+ bool1);

    testCell.setState("X");
    System.out.println("test cell is op waarde X gezet");
    
    bool1 = testCell.isSet();
    System.out.println("Is test cell nu geSet?: "+ bool1);

    System.out.println("Test cell heeft de waarde: "+ testCell.getState());
  }
}

Dit levert namelijk bij het runnen de volgende melding op:

Exception in thread "main" java.lang.ExceptionInInitializerError at Test.main(Test.java:16)
Caused by: java.lang.IllegalStateException: Toolkit not initialized
at javafx.graphics/com.sun.javafx.application.PlatformImpl.runLater(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.runLater(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.setPlatformUserAgentStylesheet(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.setDefaultPlatformUserAgentStylesheet

at javafx.controls/javafx.scene.control.Control.<clinit>(Unknown Source)

Het geheel gaat mijn pet nog even te boven

[RobIII]

Wat kwam er uit toen je ging googlen op de foutmelding? Wat gaf debuggen (Debuggen: Hoe doe ik dat?)?

Het is hier niet de bedoeling dat je 350+ (! ) regels code dumpt en dat wij je "wel even" vertellen waar je fout zit. We verwachten hier inzet van jezelf en kunnen je dan de juiste weg wijzen; we zitten hier niet om je code voor je te debuggen

Open gerust een nieuw topic maar zorg dan dat je enkel(!) relevante(!!) code post en aangeeft wat je zelf al had gezocht, gevonden, geprobeerd etc. You know the drill.