Help with Java please!

[poehalcho]

Ok, so I've got to make a game of blackjack with Java.
The codes for the way the game works are already done. they're set in individual classes.
my job is to make the event-handlers of the main java applet thing work together with the other classes so the game works as a whole.

I have no idea how though D:. I spent my whole day yesterday making event handlers that do what turned out to already have been done in the classes -.-

so anyway. I'm supposed to call upon those methods. And I have no idea how it works.

I just need someone to post a clear example for me to observe.

please, I've wasted so much time on this. even worse, when I started screwing with the event handlers this morning, I cut the stuff I made before and it autosaved. then I got a bsod before I could paste it back >_<.

[Squirt]

Use banana phone

lol I slacked on java. All I did was a tic tax toe game. Sort of

[SM-Count]

Um... multi-threaded examples? MVC or just random classes? A lot of things to consider and they all have different examples... (Or just post the code, er... upload the files somewhere :/)

[poehalcho]

Um... multi-threaded examples? MVC or just random classes? A lot of things to consider and they all have different examples... (Or just post the code, er... upload the files somewhere :/)

this is the main part:

Spoiler!

Code: Select all

import java.awt.*;
import java.awt.event.*;

  // start attributes2
import java.applet.Applet;

/* PO - Objectgeoriënteerd programmeren met java - opdracht 1
Naam en klas auteurs:
- Iordan Svechtarov 5vD
- Edward Li 5vD
*/



public class EenEnTwintigAppletv2 extends Applet {
  // Begin variabelen

  // start attributes
  private Label spelerLabel = new Label();
  private TextField scoreSpelerVeld = new TextField();
  private Label bankLabel = new Label();
  private TextField scoreBankVeld = new TextField();
  private Label uitslagLabel = new Label();
  private TextField uitslagVeld = new TextField();
  private Button nieuwspelKnop = new Button();
  private Button kaartKnop = new Button();
  private Button pasKnop = new Button();
  private KaartSpel blackjack = new KaartSpel();
  // end attributes

  public void paint(Graphics g)
     {
         blackjack.teken(g);
     }

  // Einde variabelen


    // start components2
    // end components2

  // start methods2
  // end methods2
  public void init() {
  // end attributes2

    setLayout(null);
    setSize(750,450);
    setBackground(new Color(7,141,16));
    // Begin componenten

    spelerLabel.setBounds(24, 16, 58, 20);
    spelerLabel.setText("Speler:");
    spelerLabel.setFont (new Font("MS Sans Serif", Font.BOLD, 15));
    spelerLabel.setForeground(Color.WHITE);
    add(spelerLabel);
    scoreSpelerVeld.setBounds(24, 48, 60, 30);
    scoreSpelerVeld.setFont (new Font("MS Sans Serif", Font.BOLD, 13));
    scoreSpelerVeld.setForeground(new Color(7,141,16));
    scoreSpelerVeld.setText("");
    add(scoreSpelerVeld);
    bankLabel.setBounds(24, 136, 47, 20);
    bankLabel.setText("Bank:");
    bankLabel.setFont (new Font("MS Sans Serif", Font.BOLD, 15));
    bankLabel.setForeground(Color.WHITE);
    add(bankLabel);
    scoreBankVeld.setBounds(24, 168, 60, 30);
    scoreBankVeld.setFont (new Font("MS Sans Serif", Font.BOLD, 13));
    scoreBankVeld.setForeground(new Color(7,141,16));
    scoreBankVeld.setText("");
    add(scoreBankVeld);
    uitslagLabel.setBounds(24, 256, 62, 20);
    uitslagLabel.setText("Uitslag:");
    uitslagLabel.setFont (new Font("MS Sans Serif", Font.BOLD, 15));
    uitslagLabel.setForeground(Color.WHITE);
    add(uitslagLabel);
    uitslagVeld.setBounds(24, 328, 222, 28);
    uitslagVeld.setFont (new Font("MS Sans Serif", Font.BOLD, 15));
    uitslagVeld.setForeground(new Color(7,141,16));
    uitslagVeld.setText("");
    add(uitslagVeld);
    nieuwspelKnop.setBounds(368, 328, 120, 30);
    nieuwspelKnop.setFont (new Font("MS Sans Serif", Font.BOLD, 13));
    nieuwspelKnop.setLabel("Nieuw spel");
    add(nieuwspelKnop);
    nieuwspelKnop.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        nieuwspelKnopActionPerformed(evt);
      }
    });

    kaartKnop.setBounds(512, 328, 90, 30);
    kaartKnop.setFont (new Font("MS Sans Serif", Font.BOLD, 13));
    kaartKnop.setLabel("Kaart");
    add(kaartKnop);
    kaartKnop.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        kaartKnopActionPerformed(evt);
      }
    });

    pasKnop.setBounds(624, 328, 90, 30);
    pasKnop.setFont (new Font("MS Sans Serif", Font.BOLD, 13));
    pasKnop.setLabel("Pas");
    add(pasKnop);
    pasKnop.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        pasKnopActionPerformed(evt);
      }
    });

    scoreSpelerVeld.setEditable(true);
    scoreBankVeld.setEditable(true);
    uitslagVeld.setEditable(true);
    // Einde componenten
    Kaart.laadKaarten(this);

    // start components
    // end components
  }

  // start methods


  
  // Begin eventmethoden
  
  
  public void nieuwspelKnopActionPerformed(ActionEvent evt) {

  }

  public void kaartKnopActionPerformed(ActionEvent evt) {

  }

  public void pasKnopActionPerformed(ActionEvent evt) {

  }

  
  // end methods

  // Einde eventmethoden

}

These are the classes I'm supposed to use to make it work.

Spoiler!

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import java.awt.*;
import java.applet.*;

public class Kaart implements KaartDef

/*  PO Objectgeoriënteerd programmeren met Java  */
    
{
    //velden
    
    private static Image kaarten;
    public int kaart;
    public int kleur;
    
    
    // constructor
    
    public Kaart( int kleur, int kaart)
    {
        this.kleur = kleur;
        this.kaart = kaart;
    }
    
    
    // methoden

    public static void laadKaarten(Applet a)
    {
        if (kaarten == null)
        {   
            MediaTracker tracker = new MediaTracker(a);
            kaarten = a.getImage(a.getDocumentBase(),"kaarten.gif");
            tracker.addImage(kaarten,0);
            try
            {
                tracker.waitForAll();
            }
            catch(InterruptedException e){}
        }
    }
    
    
    public void tekenKaart(Graphics g, int x, int y)   {
      g.setClip(x, y, KAARTBREEDTE, KAARTHOOGTE);
      g.drawImage(kaarten,x-kaart*KAARTBREEDTE,y-kleur*KAARTHOOGTE, null);
    }
  
    public int getKleur()  {
      return kleur;
    }
    
    public int getKaart()  {
      return kaart;
    }
    
      
}

Spoiler!

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public abstract interface KaartDef
{
    public static final int KLAVEREN = 0; 
    public static final int SCHOPPEN = 1; 
    public static final int RUITEN = 2; 
    public static final int HARTEN = 3; 
    
    public static final int AAS = 0; 
    public static final int TWEE = 1; 
    public static final int DRIE = 2; 
    public static final int VIER = 3; 
    public static final int VIJF = 4; 
    public static final int ZES = 5; 
    public static final int ZEVEN = 6; 
    public static final int ACHT = 7; 
    public static final int NEGEN = 8; 
    public static final int TIEN = 9; 
    public static final int BOER = 10; 
    public static final int VROUW = 11; 
    public static final int HEER = 12; 
    
    public static final int KAARTBREEDTE = 73;
    public static final int KAARTHOOGTE = 97;
    public static final int AANTALHANDEN = 4; 
    public static final int AANTALKAARTEN = 52; 
    public static final int AANTALKRTHAND = AANTALKAARTEN / AANTALHANDEN;  
}

Spoiler!

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import java.awt.*;
import java.applet.*;

public class KaartSpel implements KaartDef

/*  PO Objectgeoriënteerd programmeren met Java  */


{
    //velden
    
    private Kaart[] kaart = new Kaart[AANTALKAARTEN];
    private Kaart[] spelerhand = new Kaart[10];
    private Kaart[] bankhand = new Kaart[10];
    private boolean gedeeld = false;
    private boolean pas = false;
    private int kaartnr;
    private int kleurnr;
    private int tSpeler;
    private int tBank;
        
    //constructor
    
    public KaartSpel()
    {
        int i = 0;
        for (int klr = KLAVEREN; klr <= HARTEN; klr++)
        {
            for (int krt = TWEE; krt <= HEER; krt++)
            {
                kaart[i] = new Kaart(klr,krt);
                i++;
            }
            kaart[i] = new Kaart (klr, AAS);
            i++;
        }
    }
    
    
    //methoden
     
                 
    public void deelKaarten()
    {
        tSpeler =1;
        tBank = 1;
        for (int i=0; i<=tSpeler; i++)
        {  
            spelerhand[i] = new Kaart(pakKaart().getKleur(),pakKaart().getKaart());
        }
        for (int i=0; i<=tBank; i++)
        {  
            bankhand[i] = new Kaart(pakKaart().getKleur(),pakKaart().getKaart());
        }
        gedeeld = true;
        
    }
            
    public void spelerSpeelt()
    {
        if ((tSpeler < 6) && (geefSpelerscore() < 21) && gedeeld)
        {
            tSpeler++;
            spelerhand[tSpeler] = new Kaart(pakKaart().getKleur(),pakKaart().getKaart());
        }  
    }
    
    public int geefSpelerscore()
    {
        int spelerscore = 0;
        for (int i=0; i<=tSpeler; i++)
        { 
            spelerscore = spelerscore+geefKaartWaarde(spelerhand[i],true);
        }
        if (spelerscore > 21)
        {
            spelerscore = 0;
            for (int i=0; i<=tSpeler; i++)
            { 
                spelerscore = spelerscore+geefKaartWaarde(spelerhand[i],false);
            }
        }
        return spelerscore;
    }
   
   
    public void bankSpeelt()
    {
        pas = true;
        if (geefSpelerscore() < 21)
          while (geefBankscore() < 17 && geefBankscore() < geefSpelerscore() && tBank < 6 && gedeeld)
            {
                tBank++;
                bankhand[tBank] = new Kaart(pakKaart().getKleur(),pakKaart().getKaart());
            }
    }
    
    public int geefBankscore()
    {        
        int bankscore = 0;
        for (int i=0; i<=tBank; i++)
        { 
            bankscore = bankscore+geefKaartWaarde(bankhand[i],true);
        }
        if (bankscore > 21)
        {
            bankscore = 0;
            for (int i=0; i<=tBank; i++)
            { 
                bankscore = bankscore+geefKaartWaarde(bankhand[i],false);
            }
        }
        return bankscore;
    }
    
    public String bepaalUitslag()
    {
        if (geefSpelerscore() > 21)
            return "Bank heeft gewonnen.";
        else if (geefBankscore() > 21)
            return "Jij hebt gewonnen.";
        else if (geefSpelerscore() == geefBankscore())
            return "Geen winnaar.";
        else if (geefSpelerscore() > geefBankscore())
            return "Jij hebt gewonnen.";
        else
           return "Bank heeft gewonnen.";          
    }
       
    
    private Kaart pakKaart()
    {
        int i = (int)(52*Math.random());
        return kaart[i];
    }
    
    
    public void teken (Graphics g)
    {
        if(gedeeld)
        {    
            int x = 120;
            for (int i=0; i<=tSpeler; i++)
            {
                spelerhand[i].tekenKaart(g, x, 30);
                x += KAARTBREEDTE;
            }
        }
        if(pas)
        {
            int x = 120;
            for (int i=0; i<=tBank; i++)
            {
                if (i > 1)
                    try
                    {
                        Thread.sleep(300);
                    }
                    catch (InterruptedException e) {}
                bankhand[i].tekenKaart(g, x, 210);
                x += KAARTBREEDTE;
            }
             gedeeld = false;
             pas = false;
        }
     }
    
    private int geefKaartWaarde(Kaart k, boolean a)
    {
        if (k.kaart == AAS && a)
            return 11;
        else if (k.kaart == AAS && !a)
            return 1;
        else if (k.kaart > TIEN)
            return 10;
        else return k.kaart+1;
    }
}

I've made an instance in the first part with:

Code: Select all

 private KaartSpel blackjack = new KaartSpel();

and the

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 public void paint(Graphics g)
     {
         blackjack.teken(g);
     }

is experimental.

[SM-Count]

Yeah.... reading code in a different language isn't gonna work out too well for me. For a game like this, you just have to fire property change events and then call the methods that corresponds with the event. (you come up with the event names obvoiusly) That or use propertychangesupport which is a pretty easy way to do it, just google that and there should be examples.

As to the specific questions, say you don't have all that swing stuff and this was your main method.

Code: Select all

public class Main() {
  private kaartSpel k;

  public Main() {
    k = new kaartSpel();
  }

//... lots of swing code

//gonna pretend this is the button that deals a new hand
  public void nieuwspelKnopActionPerformed(ActionEvent evt) {
    k.deelKaarten();
//alternatively k = new kaartSpel(); k.deelKaarten(); I dunno if there's a reshuffle method or it reshuffles itself or something cause I can't read it but if there is use that instead of just instantiating a new one but you need to have all the cards back before you deal again
  }
}

and that's it... now if you press the thing I pretended was the "deal new hand" button your kaartSpel will have a new hand dealt and store it inside the player/bank list. Of course you'll have to write swing code (/pat) to make it show up and stuff but just stuff all your important things in those action performed methods. The event name (evt) may matter but again I didn't read through the entire code, just skimmed it. For example if you have an ace you can name the evt name for draw card as the card number from your interface and then do a conditional if evt == 0 (assume 0 stands for ace) then pop up a dialog for player to choose whether they want a 1 or 11 and else just have the card number be stored in the player hand list.

Btw, why are there 10 things for the hand list? doesn't black jack only have 2 cards? Maybe it's just the language barrier and you're storing more stuff in there than simple card numbers :/

[poehalcho]

Btw, why are there 10 things for the hand list? doesn't black jack only have 2 cards? Maybe it's just the language barrier and you're storing more stuff in there than simple card numbers :/

erhh might not've been the exact same thing as blackjack.
my card game knowledge is as limited as my java -.-

the idea of the game was to get as close as possible to 21. if you go over you lose.
if the computer gets closer to 21 than you, you also lose. if the computer goes over 21 you win. you can skip a turn if you think you're chances of getting too high are large.

Also thank you for the explanation. This is much clearer than any of my online instructions D:. I also just received a completed version of the whole thing from a classmate. I'll use your info and his project to make something of my own.

As my thanks, a laugh:
here's an example of how they explain an instance in my instructions:

A new chair that is made under the class Chair is called an instance of Chair. For instance, a kitchen chair is an instance of the class Chair, but a kitchen table is not.

Yes, now they expect me to know everything about instances.

[SM-Count]

edit: didn't see your edit and I'm sorry for how terribly they're teaching you, makes me cringe

[emperor3000]

Spoiler!

Code: Select all

public class Blackjack {
    public static void main(String[] args) {
        System.out.println("Hello World!")
    }
}

Spoiler!

:dope:

[EvGa]

Spoiler!

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public class Blackjack {
    public static void main(String[] args) {
        System.out.println("Hello World!")
    }
}

Spoiler!

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public class Wut {
    public static void main(String[] args) {
         int i = 0;
         while(i ==0){ 
              System.out.println("No.");
         }
    }
}

OP:Try This

I know you already figured it out but maybe that will help in the future. Finding examples on youtube is a really good way to learn also.