java - What does EnumSet really mean? - Stack Overflow
网页An EnumSet is a Set which contains enum instance of a specific enum type, in a more efficient way than other Set implementations (like HashSet, TreeSet, etc.). To know what an EnumSet is, read its API.
Getting the value from an EnumSet in Java - Stack Overflow
网页2008年12月12日 · If you use an EnumSet to store conventional binary values (1,2,4 etc), then when there are less than 64 items, I am led to believe that this is stored as a bit vector and is represented efficiently...
Combining Java EnumSets - Stack Overflow
网页2012年8月24日 · An EnumSet is also a collection, so you can use many of the Collection API calls as well, such as addAll.
How does java.util.EnumSet<E> work? - Stack Overflow
网页2015年8月20日 · The EnumSet<E> class is defined as: public abstract class EnumSet<E extends Enum<E>> extends AbstractSet<E> implements Cloneable, Serializable in JCF. Also, most of the methods that the class itself implements are static. Lastly, the class does not seem to implement the add(), iterator(), remove(), size(), contains() or isEmpty() methods and just inherits them from AbstractSet which doesn't ...
java - EnumSet from array, shortest variant? - Stack Overflow
网页44. I need an EnumSet from an array (which is given through a varargs method parameter). First, I was surprised that there is no varargs constructor method in EnumSet (there is EnumSet#of(E first, E... rest)). As a workaround, I used the following variant: EnumSet<Options> temp = EnumSet.copyOf(Arrays.asList(options)); However, this triggers a ...
Is Java's EnumSet mutable? - Stack Overflow
网页2018年3月13日 · 7. Yes EnumSet is modifiable. If you want to create an immutable EnumSet then go for immutableEnumSet. Returns an immutable set instance containing the given enum elements. Internally, the returned set will be backed by an EnumSet. The iteration order of the returned set follows the enum's iteration order, not the order in which the elements ...
java - How to create empty EnumSet? - Stack Overflow
网页2016年12月13日 · 65. I am struggling with EnumSet as it surprisingly doesn't have a simple constructor and its methods doesn't like null values. What I came up with: EnumSet<MyClass> x = EnumSet.copyOf(Collections.<MyClass>emptySet()); Which somewhat works but doesn't seem right to me. java. enumset. edited Mar 9, 2023 at 15:19.
enums - Iterate through an EnumSet in java? - Stack Overflow
网页2012年2月7日 · When I create an EnumSet and send it via a function, I find myself unable to reach the Enum values set inside the EnumSet. All I can do is compare it to the original set and check if it is present.
List of enum values in java - Stack Overflow
网页2012年10月28日 · In Java 10 and later, you can conveniently create a non-modifiable List by passing the EnumSet. The order of the new list will be in the iterator order of the EnumSet. The iterator order of an EnumSet is the order in which the element objects of the enum were defined on that enum. List< Animal > nonModList = List.copyOf( allAnimals ) ; // Or ...
Filling a List with all enum values in Java - Stack Overflow
网页2013年4月22日 · I would like to fill a list with all possible values of an enum Since I recently fell in love with EnumSet, I leveraged allOf() EnumSet<Something> all = EnumSet.allOf( Something.class); List...