CODEWITHSUNDEEP
javaswingclassjbutton
krychuq
krychuq

Reputation: 445

JButton in separate class file

I wrote class which contain simple JFrame and I want to add button from other class to this JFrame

When I'm trying to write

panel.add(new CancelButton())

I got an error: LoginWindow.java:29: error: no suitable method found for add(CancelButton)

Can you help me with it?

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


public class LoginWindow {

public LoginWindow(){

//Login Window
JFrame frame = new JFrame("Movie date base");
frame.setSize(500,500);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//label
JLabel label = new JLabel("Welcom to Movie Date Base! ");
label.setFont(new Font("Verdana", Font.PLAIN, 18));
//panel
JPanel panel = new JPanel(new GridBagLayout());
JPanel panel1 = new JPanel(new GridBagLayout());
//add panel to the frame
frame.add(panel);
frame.getContentPane().add(panel, BorderLayout.NORTH);
frame.getContentPane().add(panel1, BorderLayout.SOUTH);

//Grid layout
GridBagConstraints c = new GridBagConstraints();
c.insets = new Insets(100,10,10,10);
panel.add(label,c);

   }
}

import javax.swing.*;

public class CancelButton {
public CancelButton(){

JButton cancel = new JButton("cancel");

  }

}

Upvotes: 2

Views: 1030

Answers (2)

tttdanielak
tttdanielak

Reputation: 1

If you'd like to keep it like it is, put the button into an array, and in the jframe, instantiate the cancel class and call from the array.

Upvotes: 0

Kevin Workman
Kevin Workman

Reputation: 42176

If you want to treat your CancelButton class as a JButton, then it has to extend JButton.

public class CancelButton extends JButton{
   public CancelButton(){
      //call the parent-level constructor
      super("cancel");

  }
}

Note that I've gotten rid of your cancel variable here, since your CancelButton class is-a JButton now. You can use it anywhere you can use a JButton.

However, if instead you want to use the cancel variable in other classes, then you need to create some kind of getter function for it:

public class CancelButton {

   JButton cancel;

   public CancelButton(){
      cancel = new JButton("cancel");
   }

   public JButton getButton(){
      return cancel;
   }
}

Then you would call that getButton() function, like this:

panel.add(new CancelButton().getButton())

Which approach you take really depends on exactly what you're trying to do, and how you want to organize your code.

Upvotes: 5

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