import java.awt.FlowLayout;
import java.awt.event.ActionEvent;

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

public class MainWindow extends JFrame {

    JCheckBox check1 = new JCheckBox();
    JButton button1 = new JButton("Mehet");
    public MainWindow() {
        this.check1.setText("alma");
        this.button1.addActionListener((e)->{
            button1_on_click(e);
        });

        this.add(check1);
        this.add(button1);
        this.setLayout(new FlowLayout());
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(300, 200);
        this.setVisible(true);
    }
    private void button1_on_click(ActionEvent e) {
        
        if(this.check1.isSelected()) {
            System.out.println("kiválasztva");
        }
        
    }
}