AWT Bomb Game

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.Label;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Random;

public class Bomb {
  public static final String NAME = "爆弾カウントダウン";
  private Frame window;
  private Dialog dialog;
  private int count;
  private int turn;

  public Bomb() {
    init_and_run();
  }

  private void init_and_run() {
    Random r = new Random();
    count = r.nextInt(30) + 1;
    turn = 0;
    window = new Frame(NAME);
    window.setIgnoreRepaint(true);
    window.setResizable(true);
    window.add(new Label("カウントを進めてください"));
    Button b;
    window.add(b = new Button("    −１     "), BorderLayout.WEST);
    b.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        turn++;
        window.add(new Label("" + turn + "回"));
        decrease_count();
      }
    });
    window.add(b = new Button("     −２     "), BorderLayout.EAST);
    b.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        turn++;
        decrease_count();
        decrease_count();
      }
    });
    window.add(b = new Button("Exit"), BorderLayout.SOUTH);
    b.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        quit();
      }
    });
    window.addWindowListener(new WindowAdapter() {
      @Override
      public void windowClosing(WindowEvent e) {
        quit();
      }
    });
    window.pack();
    window.setVisible(true);
    window.requestFocus();
  }

  private void decrease_count() {
    count--;
    if (count < 0) bomb();
  }

  private void bomb() {
    dialog = new Dialog(window, "BOMB!", true);
    dialog.addWindowListener(new WindowAdapter() {
      @Override
      public void windowClosing(WindowEvent e) {
        quit();
        dialog_quit();
      }
    });
    Button b;
    dialog.add(b = new Button("Exit"), BorderLayout.CENTER);
    b.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        quit();
        dialog_quit();
      }
    });
    dialog.add(new Label("BOOOOMB!!!!! " + turn + " 回"), BorderLayout.NORTH);
    dialog.pack();
    dialog.setVisible(true);
  }

  public void quit() {
    window.setVisible(false);
    window.dispose();
  }

  public void dialog_quit() {
    dialog.setVisible(false);
    dialog.dispose();
  }

  public static void main(String[] args) {
    Bomb b = new Bomb();
    b.quit();
  }
}