How do you compare enums?
We can compare enum variables using the following ways.
- Using Enum. compareTo() method. compareTo() method compares this enum with the specified object for order.
- Using Enum. equals() method.
- Using == operator. The == operator checks the type and makes a null-safe comparison of the same type of enum constants.
Can enum be modified?
4) Enum constants are implicitly static and final and can not be changed once created.
Can enum implement comparable?
An enum in Java implements the Comparable interface. It would have been nice to override Comparable ‘s compareTo method, but here it’s marked as final. The default natural order on Enum ‘s compareTo is the listed order.
How do I compare enum values in a String?
For comparing String to Enum type you should convert enum to string and then compare them. For that you can use toString() method or name() method. toString()- Returns the name of this enum constant, as contained in the declaration.
Can you use == for enum?
Because there is only one instance of each enum constant, it is permissible to use the == operator in place of the equals method when comparing two object references if it is known that at least one of them refers to an enum constant.
Can you extend an enum Java?
No, we cannot extend an enum in Java. Java enums can extend java. lang. Enum class implicitly, so enum types cannot extend another class.
Can we create enum object?
The only difference is that enum constants are public , static and final (unchangeable – cannot be overridden). An enum cannot be used to create objects, and it cannot extend other classes (but it can implement interfaces).
Can we use equals with enum in Java?
Testing equality of an enum value with equals() is perfectly valid because an enum is an Object and every Java developer knows == should not be used to compare the content of an Object. At the same time, using == on enums: provides the same expected comparison (content) as equals()