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JRE 7 not registering with Eclipse [message #551913]

Tue, 10 August 2010 07:28

No real name

Messages: 2
Registered: August 2010

Junior Member

Hi. I'm using Eclipse Version: 3.4.1.

I've added the new Java 7 JRE to my build path, but Eclipse puts a red line underneath my code when I try to use a switch statement on a String (a handy Java 7 feature).

String s = "asd";
switch(s) {

}

The preceding code won't work, for example, because it "Cannot switch on a value of type String. Only convertible int values or enum constants are permitted".

Why can't Eclipse realize that I'm using JRE 7?

I think it's because of the Compiler Compliance level, but JRE 7 (represented by 1.7?) doesn't show on the list of "levels".
My list includes:
1.4
1.5
1.6
..and that's it.

What's the deal? I was just about to celebrate some much cleaner, elseif-free code.

[Updated on: Tue, 10 August 2010 07:29]

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Re: JRE 7 not registering with Eclipse [message #551923 is a reply to message #551913]

Tue, 10 August 2010 08:03

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

adhoc334@gmail.com wrote:
> Hi. I'm using Eclipse Version: 3.4.1.
>
> I've added the new Java 7 JRE to my build path, but Eclipse puts a red
> line underneath my code when I try to use a switch statement on a
> String (a handy Java 7 feature).
>
> String s = "asd";
> switch(asd) {
>
> }
>
> The preceding code won't work, for example, because it "Cannot switch
> on a value of type String. Only convertible int values or enum
> constants are permitted".
>
> Why can't Eclipse realize that I'm using JRE 7?
Java 7 is not yet supported by Eclipse. The main reason is that the
specifications are either still not available (e.g. a JSR that defines
what Java 7 is) or they are under a license which is incompatible to EPL.

Dani
>
> I think it's because of the Compiler Compliance level, but JRE 7
> (represented by 1.7?) doesn't show on the list of "levels".
> My list includes:
> 1.4
> 1.5
> 1.6
> .and that's it.
> What's the deal? I was just about to celebrate some much cleaner,
> elseif-free code.

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Re: JRE 7 not registering with Eclipse [message #551941 is a reply to message #551923]

Tue, 10 August 2010 09:05

No real name

Messages: 2
Registered: August 2010

Junior Member

Ugh...Thank you.

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Re: JRE 7 not registering with Eclipse [message #552408 is a reply to message #551923]

Thu, 12 August 2010 06:23

Walter Harley

Messages: 847
Registered: July 2009

Senior Member

"Daniel Megert" <daniel_megert@ch.ibm.com> wrote in message
news:i3r158$g12$1@build.eclipse.org...
> adhoc334@gmail.com wrote:
>> Hi. I'm using Eclipse Version: 3.4.1.
>>
>> I've added the new Java 7 JRE to my build path, but Eclipse puts a red
>> line underneath my code when I try to use a switch statement on a String
>> (a handy Java 7 feature).
>>
>> String s = "asd";
>> switch(asd) {
>>
>> }
>>
>> The preceding code won't work, for example, because it "Cannot switch on
>> a value of type String. Only convertible int values or enum constants are
>> permitted".
>>
>> Why can't Eclipse realize that I'm using JRE 7?
> Java 7 is not yet supported by Eclipse. The main reason is that the
> specifications are either still not available (e.g. a JSR that defines
> what Java 7 is) or they are under a license which is incompatible to EPL.

And even if it were supported by Eclipse, it wouldn't be supported by
Eclipse 3.4.1, which is two years old. We were still working on getting the
Eclipse compiler to fully support Java 6 at that point.

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Re: JRE 7 not registering with Eclipse [message #554691 is a reply to message #551913]

Tue, 24 August 2010 06:29

Eclipse User

I've added the new Java 7 JRE to my build path, but Eclipse puts a red line underneath my code when I try to use a switch statement on a String

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Re: JRE 7 not registering with Eclipse [message #557727 is a reply to message #554691]

Wed, 08 September 2010 15:34

Olivier Thomann

Messages: 518
Registered: July 2009

Senior Member

Eclipse has its own compiler which doesn't support 1.7 yet. If you really want to use javac to compile, you should use an ant task and disable the java builder.

Of course this will cause other kinds of issues.
--
Olivier

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