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I have a class that defines its own enum like this:
public class Test { enum MyEnum{E1, E2}; public static void aTestMethod() { Test2(E1); // << Gives "E1 cannot be resolved" in eclipse. } public Test2(MyEnum e) {} } If I specify MyEnum.E1 it works fine, but I'd really just like to have it as "E1". Any idea how I can accomplish this, or does it have to be defined in another file for this to work?
CONCLUSION: I hadn't been able to get the syntax for the import correct. Since several answers suggested this was possible, I'm going to select the one that gave me the syntax I needed and upvote the others.
By the way, a REALLY STRANGE part of this (before I got the static import to work), a switch statement I'd written that used the enum did not allow the enum to be prefixed by its type--all the rest of the code required it. Hurt my head.
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Enums are reference types, in that they can have methods and can be executed from command line as well , if they have main method.
In Java you cannot pass any parameters by reference. The only workaround I can think of would be to create a wrapper class, and wrap an enum. Now, reference will contain a different value for your enum; essentially mimicking pass-by-reference.
I must answer a resounding no because actually you can't. Enums have their own data type and each enum is essentially a new data type.
All enums implicitly extend java. As a class can only extend one parent in Java, so an enum cannot extend anything else.
Actually, you can do a static import of a nested enum. The code below compiles fine:
package mypackage; import static mypackage.Test.MyEnum.*; public class Test { enum MyEnum{E1, E2}; public static void aTestMethod() { Test2(E1); } public static void Test2(MyEnum e) {} } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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