How to organize the code correctly?

Question

Java

I am making a menu for the program and there are many similar places:

// ...
menuFile = new JMenu("Файл");
menuBar.add(menuFile);

itemCreate = new JMenuItem("Создать");
itemCreate.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
    // код
  }
});
menuFile.add(itemCreate);
// ...

In total there are 5 menu items and something like 40 buttons. I found lambdas on the Internet, which slightly simplified the creation of each menu item by moving the code into a separate method:

// ...
itemCreate = new JMenuItem("Создать");
itemCreate.addActionListener(e -> onCreate());
menuFile.add(itemCreate);
// ...

However, the main class still seems too long and overloaded to me. How is this problem usually solved? Is it okay to move the button methods to a separate class and make them static? Or is it better to create a separate package with a class for each button, overriding the main JMenuItem class?