connect-four/src/de/itsblue/ConnectFour/ButtonRow.java

package de.itsblue.ConnectFour;

import javax.swing.JButton;

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

public class ButtonRow extends JPanel{

    JButton inputButtons[];
    int buttoncount = 0;

    public void InitButton() {

        
        // configure the layout
        this.setLayout(new GridLayout(1,7));

        for (int i = 0; i < this.buttoncount; i++) {
            this.inputButtons[i] = new JButton();
            this.inputButtons[i].setText(""+i);
            this.add(this.inputButtons[i]);
        }
       
    }
        
    ButtonRow(int buttoncount) {
        this.buttoncount = buttoncount;
        this.inputButtons = new JButton[buttoncount];
        this.InitButton();
        this.setBackground(Color.RED);
    }

    @Override
    public void paint(Graphics g){
        Dimension size = this.getSize();

        for (int i = 0; i < this.buttoncount; i++) {
            this.inputButtons[i].setPreferredSize(new Dimension(size.width/this.buttoncount, size.height));
        }

        super.paint(g);
    }

    @Override
    public void setPreferredSize(Dimension preferredSize) {
        super.setPreferredSize(preferredSize);
    }


}