Calling a method in another class

This must be a classic 'if I had a dollar' kind of question, but I'm confused about calling methods in other classes. The problem snippet is:

Code:

---

Card card = new Card();
 card.Card();

---

- which to the best of my knowledge should work, but doesn't. What I want to do, for the purpose of experimenting with CardLayout, is initiate the Card Layout tutorial (in the class Card) from another class by calling the method Card();. Here's the whole thing:

Code:

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Menu {
 
   
    public static void main(String[] args) {
    JFrame frame = new JFrame("Menu");
 
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setSize(1200,800);
    frame.setVisible(true);

   
            }
   
 
    Card card = new Card();
    card.main();

   
    }


 class Card extends JPanel {
  CardLayout cards = new CardLayout();

  public Card() {
    setLayout(cards);
    ActionListener listener = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        cards.next(Card.this);
      }
    };
    JButton button;
    button = new JButton("one");
    button.addActionListener(listener);
    add(button,        "one");
    button = new JButton("two");
    button.addActionListener(listener);
    add(button,        "two");
    button = new JButton("three");
    button.addActionListener(listener);
    add(button,        "three");
  }

  public static        void main(String[] args) {
    JFrame frame = new JFrame("Card");
    frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    frame.setSize(200, 200);
    frame.setLocation(200, 200);
    frame.setContentPane(new Card());
    frame.setVisible(true);
  }
}

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1) are both classes in the same package?
2) you have to write

Code:

---

Card card = new Card();
card.main();

---

in the main of the menu class

Hi uncopywritable,

Please use [code] tag to wrap your codes. It makes the code much more readable and it is very easy to use!

And i did not understand what you really want. As far as i see your card class does not have a Card() method.

First off, gabriel - I tried your suggestion and it works if I declare the main method of Card:

Code:

---

public static        void main() {
}

---

instead of:

Code:

---

public static        void main(String[] args) {
}

---

writing

Code:

---

Card card = new Card();
    card.main(String[] args);

---

in the main of Menu doesn't work! It would be great if I could activate methods regardless of the argument they take. Is there a way to do this?

Sorry levent, I just didn't realise about the tags, my browser seems to find the code and tag it anyway, which is odd.

The method Card() is in the class Card and goes like this:

Code:

---

public Card() {
    setLayout(cards);
    ActionListener listener = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        cards.next(Card.this);
      }
    };
    JButton button;
    button = new JButton("one");
    button.addActionListener(listener);
    add(button,        "one");
    button = new JButton("two");
    button.addActionListener(listener);
    add(button,        "two");
    button = new JButton("three");
    button.addActionListener(listener);
    add(button,        "three");
  }

---

All my attempts to call this method have failed.

Quote:

---

All my attempts to call this method have failed.

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But it is constructor, not a method. You should at least add void keyword in front of the method name to make it a method.

Ah. Right. I was confused between the class declaration and the constructor.

Thanks for pointing that out! :)

My self anuj , I will see how I am on this forum

Welcome anuj. Please do not revive old threads unless you have something substantial to add, notifying everyone that you're on this forum by posting to an old thread disqualifies as a substantial attribute. Can I have my minute and fifteen seconds back please?

Thanks for your answer

I'm trying to instance but i have an error too

Code:

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public boolean addAluno(Aluno aluno)
    {
        boolean estado = false;
        Aluno t= new Aluno(); // found no arguments ---
        t.getID();
        for(int i=0; i<alunos.size(); i++)
        {
     
     
      }
      alunos.add(aluno);
      return true;
    }

---

After instance i think expect something, iv'e tried to put (aluno, id) and i have another error saying can't find symbol "id"

I'm lost...