Compile error - GWT Google Web Toolkit (2.10.0, 2.10.1, 2.11.0) on java17. about gwt HOT 13 CLOSED

You can run the compiler with JDK 17, but you cannot use Java 17 language features. Those will be added in GWT 2.12 and the progress is tracked here: #9869

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Since source level 17 is not available with gwt 2.11.0 and AFAIK if you do not set a value it should resolve to source level 1.8, you're left with one choice....
For what is worth in my configs I am setting the source level to 11
PS: but I do see your point

Do you mean, it won't support java17 compiler? Our project is upgrading to java17 so, all its modules should be compiled by 17 only. I just want to make sure why it's not allowing to compile in "17" even though it was mentioned in GWT release document.

You can use JDK 17 to compile your project and also use it to start the GWT compiler. The sourceLevel argument defines which Java language features the GWT compiler will accept while compiling your Java code to JavaScript. That is independent of the JVM you are using to compile your app and run the GWT compiler.

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Note: I don't want to pass -sourceLevel 11 argument to compile on 17

Why not?

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Closing the issue because -sourceLevel 17 is expected to fail with GWT 2.11 as GWT only understands language features up to Java 11.

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What is the actual error?

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Error is getting as below then stops the compilation.
Source level must be one of [auto, 1.8, 9, 10, 11].
Google Web Toolkit 2.11.0

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btw: are u using GIN?

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btw: are u using GIN?

No

from gwt.

Note: I don't want to pass -sourceLevel 11 argument to compile on 17

Why not?

Don't want to bypass the java17 compiler.

from gwt.

Since source level 17 is not available with gwt 2.11.0 and AFAIK if you do not set a value it should resolve to source level 1.8, you're left with one choice....

For what is worth in my configs I am setting the source level to 11
According to @niloc132 in order to get the new lang features you'll have to set source level to either auto or 11

PS: but I do see your point

from gwt.

Since source level 17 is not available with gwt 2.11.0 and AFAIK if you do not set a value it should resolve to source level 1.8, you're left with one choice....

For what is worth in my configs I am setting the source level to 11

PS: but I do see your point

Do you mean, it won't support java17 compiler?
Our project is upgrading to java17 so, all its modules should be compiled by 17 only.
I just want to make sure why it's not allowing to compile in "17" even though it was mentioned in GWT release document.

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Also see this gitter thread

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Thank you all for your support and quick response.

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