Java array of enum values

Question

Machine is defined as public enum Machine{...}

_machines is defined as private Machine[] _machines;

Don't know why this doesn't work:

_machines = {Machine.a, Machine.b};

error message:

illegal start of expression

Thank you guys!

Similar: stackoverflow.com/questions/3504849/java-weird-array-behavior/… — missingfaktor
– missingfaktor, Commented Nov 18, 2010 at 13:01

jjnguy · Accepted Answer · 2010-11-17 16:24:23Z

49

You are missing one tiny part of the Array declaration.

_machines = new Machine[]{Machine.a, Machine.b};

answered Nov 17, 2010 at 16:24

jjnguy

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4 Comments

ceving Over a year ago

Machine.a, Machine.b can be simplified to a, b. The prefix is redundant, because an array of Machine enums can only contain Machine enums.

Pulkit Agarwal Over a year ago

@ceving this does not work. Is there something I need to do to make this happen? I do not want to write "Machine" every time.

jjnguy Over a year ago

@PulkitAgarwal have a look at static imports. docs.oracle.com/javase/1.5.0/docs/guide/language/…

Kostanos Over a year ago

Ho do I find not the position of some enum on this array? _machines.indexOf(Machine.a) doesn't work :(

JG007 · Accepted Answer · 2016-10-27 21:20:38Z

2

This can also be declared empty at first if you give it a size.

_machines = new Machine[size];

answered Oct 27, 2016 at 21:20

JG007

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1 Comment

Leo Nikkilä Over a year ago

Note that this is different from OP’s case. This initialises an array with null values, whereas OP is asking about initialising it with predefined non-null values.

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