To get Enable Java compiler warnings from build logs, enable warning options of the Java compiler.in your build to see them in the pull requests:
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In Maven
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tasks.withType(JavaCompile) {
options.compilerArgs << "-Xlint:all"
} |
In Javac
Use the -Xlint:all flag for the Java compiler to get all warnings. Check the javac manual if you only want to enable specific warnings.