Enum with switch

Question

I have an enum and I need to bind these values to the switch in another class, Help please, I'm confused

public enum GSProccesingType {
    bigCover,
    cover,
    other
}

class Test {
 switch (GSProccesingType){
        case bigCover:
        break;
        case cover:
            break;
        case default:
    }
 }

enter image description here

Switch takes a value expression, not a type even for the num. — ernest_k, Sep 04 '18 at 05:36
1) You can't have raw statements in a class declaration; they need to be in a method or an initialization block. 2) You have to `switch` on a value, not on a type. — Robby Cornelissen, Sep 04 '18 at 05:37
https://stackoverflow.com/questions/2836286/enums-use-in-switch-case?rq=1 maybe this works for you — JoseCarlosPB, Sep 04 '18 at 05:38
`case default:` is also a syntax error. Did you mean `default:` or `case other:`? — Henry, Sep 04 '18 at 05:39
https://stackoverflow.com/a/6391791/4848659 can find exact answer you need here. You need an instace to be created and then, used. — Gimhani, Sep 04 '18 at 05:40
You should follow the Java Naming Conventions: enums are considered constants and thus should be written down in UPPER_SNAKE_CASE. — MC Emperor, Sep 04 '18 at 05:46
Besides, when you write down your switch statement like that, what are you expecting it to do? — MC Emperor, Sep 04 '18 at 05:49

Pankaj Singhal · Answer 1 · 2018-09-04T05:41:58.740

0

You'll have to create an object first. Then use that object in switch statement. Like below:

GSProccesingType type = GSProccesingType.cover;.   // type will hold any one of the enum values. Cover is one such value
switch(type){...}

For your example you need to put bigCover in switch

edited Sep 04 '18 at 05:41

answered Sep 04 '18 at 05:37

Pankaj Singhal

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why .cover if i have in enum 3 values: bigCover, cover and other? – Mike Mclaren Sep 04 '18 at 05:38
It's an example. The object will hold any one of the enum values – Pankaj Singhal Sep 04 '18 at 05:38
I can not understand .cover And what is this? – Mike Mclaren Sep 04 '18 at 05:40
For your case bigCover holds the value of the enum. Put that variable in the switch. – Pankaj Singhal Sep 04 '18 at 05:43
@TerletskiyAlexander Perfect example, when you don't read the topic completely and directly jumped into implementation.You should first understand `what is ENUM` – Ravi Sep 04 '18 at 05:45
@TerletskiyAlexander are you coding with C before? In C language, you can get the enum value right away. But with Java, you need to get first the enum parent GSProccessingType. Also you need a non-constant expression when passing to switch statement. For example `GSProccesingType yourExpression; yourExpression = GSProccesingType (dot) (your selected enum); switch ( yourExpression){ case GSProccesingType.bigCover: break; case GSProccesingType.cover: break; case GSProccesingType.other: break; case default: ;}` – Leandro Keen Zapa Sep 04 '18 at 06:03

Enum with switch

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