Java Data Type How to - Create enum with enum in constructor

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Question

We would like to know how to create enum with enum in constructor.

Answer

import java.util.EnumSet;
//from w w  w.  j av  a  2 s  . co  m
public class Main {
  public static void main(String... args) {
    System.out.println(ToolBar.NEW_WINDOW.getBtns());
    System.out.println(ToolBar.EDIT_WINDOW.getBtns());
    System.out.println(ToolBar.DELETE_WINDOW.getBtns());
  }
}

enum Action {
  SAVE, UPDATE, CANCEL, DELETE
}

enum ToolBar {
  NEW_WINDOW(EnumSet.of(Action.SAVE, Action.UPDATE)), EDIT_WINDOW(
      EnumSet.of(Action.UPDATE, Action.CANCEL)), DELETE_WINDOW(
      EnumSet.of(Action.CANCEL, Action.DELETE));

  private EnumSet<Action> buttons;

  ToolBar(EnumSet<Action> buttons) {
    this.buttons = buttons;
  }

  EnumSet<Action> getBtns() {
    return this.buttons;
  }
}

The code above generates the following result.

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