[英]java enum with enum in constructor
Is it possible to let a enum in java take a set of enums as as argument? 是否可以让java中的枚举将一组枚举作为参数? If yes, then how do I implement it? 如果是,那我该如何实现呢?
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. 使用这个时,我想说的是:拿一个MODAL_SETTINGS.EDIT_MODAL_WINDOW并使用按钮MODAL_BUTTONS.SAVE和MODAL_BUTTONS.CANCEL创建它。
This is what I have as of now 这就是我现在所拥有的
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
}
Instead of this: 而不是这个:
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 要么
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
. 否则你只是传递一个Class<T>
,而不是一个EnumSet
。
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;
}
}
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]
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