import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class ButtonArray extends JFrame {
    public ButtonArray() {
        this.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public JButton[] addButtons(String[] names) {
        JButton[] btns = new JButton[names.length];
        for (int i = 0; i < names.length; i++) {
            btns[i] = new JButton(names[i]);
            this.add(btns[i]);
        }
        return btns;
    }
    public static void main(String[] args) {
        ButtonArray ba = new ButtonArray();
        ba.setSize(300, 200);
        ba.setVisible(true);

        String[] names = { "AAAA", "BBBB", "CCCC", "Hello", "World", "1111", "2222", "3333", "4444" };
        ba.addButtons(names);
    }
}