macOS Java - Working with separate classes

[D A]

Due to the size of the code I've separated it into multiple classes (instead of having it all in one giant class).

I have these classes:

main class:
creates gui

button class:
creates buttons

calculation class:
where all the actual 'work' takes place.

My problem:
I need to access a JTextField I created in the main class in the calculation class. The trouble is that calculation class is initialized in my button class, in the actionPerformed() function.

How would I gain access to the JTextField in my calculation class? Should I pass it along while initializing the button class? Or some other way?


Basic code of what I have now:

main

public class myMain extends JFrame
{
   private JPanel left, right;
   private JTextField mytext;
   public myMain()
   {
      // Creating GUI here...
   }
   public void main(String[] args)
   {
      myMain mainClass = new myMain();
      buttons myButtons = new buttons();
      myButtons.createButtons(myMain.left, myMain.right);
      // ...
   }
}

button

public class buttons implements ActionListener
{
   public void createButtons(JPanel left, JPanel Right)
   {
      //Creating buttons here...
   }
   public void actionPerformed(ActionEvent e)
   {
      calculation myCalc = new calculation();
      myCalc.performCalc();
   }
}

calculation

public class calculation
{
   public void performCalc()
   {
      // Do stuff...
      updateTextField();
   }
   public void updateTextField()
   {
      // Do stuff with text
      mytext.setText("The text");
   }
}

What do I need to change to be able to write to mytext in the class calculation?

 

[tofagerl]

Make a method in the class with the object that does the change, and then call that class.method() from the other class.