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I got the error while building.

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  • You are using JDK 1.8 and trying to use language level 18, go to the project settings and change it to 8. Commented Apr 28, 2022 at 8:13

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Your project uses java 8 (denoted by 1.8) but your IDE is having Java 18. Upgrade your project to java 18 or change settings in your IDE to Java 8

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My project is based on Java 18 so I installed Java SDK 18 then setting up File | Project Structure | Platform Settings | SDKs | + | Detected SDKs: [sdk 18], Project Settings | Project | SDK: 18, Language level: SDK default (18 - No new language features); Project Settings | Modules | Sources: Project default (18 - No new language features). It worked. Thanks

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