import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

        class Button {
        static JButton button1 = new JButton("iuo"); }

        class ButtonListener1 extends Button implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            button1.setText("Привет");
            Font BigFontTR = new Font("TimesRoman", Font.BOLD, 100);
            button1.setFont(BigFontTR);
        } }


        class SomeThing extends ButtonListener1 implements Runnable {
            public void run() {
                  // Как сделать так, чтобы поток ждал нажатия на кнопку?
            }
        }


        public class Jitik extends SomeThing {
            public static void main(String[] args) throws InterruptedException {
                JFrame frame = new JFrame("Jitik");
                frame.setSize(800, 1000);
                frame.setLocationRelativeTo(null);
                JPanel panel = new JPanel(new GridLayout(2, 1, 5, 5));
                frame.add(panel);
                panel.add(button1);
                button1.addActionListener(new ButtonListener1());
                frame.setVisible(true);

                SomeThing mThing = new SomeThing();
                Thread myThready = new Thread(mThing);
                myThready.start();
                myThready.join();

                String s = button1.getText();
                System.out.println(s);
            }
        }