java java枚举与构造函数中的枚举
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java enum with enum in constructor
提问by Marthin
Is it possible to let a enum in java take a set of enums as as argument? If yes, then how do I implement it?
是否可以让 java 中的枚举将一组枚举作为参数？如果是，那么我该如何实施？
When using this I whant to be able to say something like: Take a MODAL_SETTINGS.EDIT_MODAL_WINDOW and create this with the buttons MODAL_BUTTONS.SAVE & MODAL_BUTTONS.CANCEL.
使用它时，我希望能够说这样的话：拿一个 MODAL_SETTINGS.EDIT_MODAL_WINDOW 并用按钮 MODAL_BUTTONS.SAVE 和 MODAL_BUTTONS.CANCEL 创建它。
This is what I have as of now
这是我目前所拥有的
public enum MODAL_SETTINGS {
NEW_MODAL_WINDOW(MODAL_BUTTONS.class),
EDIT_MODAL_WINDOW(MODAL_BUTTONS.class),
DELETE_MODAL_WINDOW(MODAL_BUTTONS.class);
private EnumSet buttons;
private MODAL_SETTINGS(EnumSet<MODAL_BUTTONS> buttons){
}
}
public enum MODAL_BUTTONS {
SAVE, UPDATE, CANCEL, DELETE
}
回答by Jon Skeet
Instead of this:
取而代之的是：
NEW_MODAL_WINDOW(MODAL_BUTTONS.class),
I suspect you want this:
我怀疑你想要这个：
NEW_MODAL_WINDOW(EnumSet.allOf(MODAL_BUTTONS.class))
or
或者
NEW_MODAL_WINDOW(EnumSet.of(MODAL_BUTTONS.SAVE, MODAL_BUTTONS.CANCEL))
(etc).
（等等）。
Otherwise you're just passing a Class<T>, not an EnumSet.
否则你只是通过一个Class<T>，而不是一个EnumSet。
回答by Andreas Dolk
No problem:
没问题：
enum Color {YELLOW, BLUE, GREEN}
enum Environment {
SUN(Color.YELLOW), OCEAN(Color.BLUE), TREE(Color.GREEN);
private Color color;
private Environment(Color color) {
this.color = color;
}
public Color getColor() {
return color;
}
}
回答by dhblah
Yes, look at this:
是的，看看这个：
import java.util.EnumSet;
public class EnumTest {
public static enum MODAL_BUTTONS {
SAVE, UPDATE, CANCEL, DELETE
}
public static enum MODAL_SETTINGS {
NEW_MODAL_WINDOW(EnumSet.of(MODAL_BUTTONS.SAVE, MODAL_BUTTONS.UPDATE)),
EDIT_MODAL_WINDOW(EnumSet.of(MODAL_BUTTONS.UPDATE, MODAL_BUTTONS.CANCEL)),
DELETE_MODAL_WINDOW(EnumSet.of(MODAL_BUTTONS.CANCEL, MODAL_BUTTONS.DELETE));
private EnumSet<MODAL_BUTTONS> buttons;
MODAL_SETTINGS(EnumSet<MODAL_BUTTONS> buttons){
this.buttons = buttons;
}
EnumSet<MODAL_BUTTONS> getBtns() {
return this.buttons;
}
}
public static void main(String... args) {
System.out.println(MODAL_SETTINGS.NEW_MODAL_WINDOW.getBtns());
System.out.println(MODAL_SETTINGS.EDIT_MODAL_WINDOW.getBtns());
System.out.println(MODAL_SETTINGS.DELETE_MODAL_WINDOW.getBtns());
}
}
The output is:
输出是：
[SAVE, UPDATE]
[UPDATE, CANCEL]
[CANCEL, DELETE]
