To get Java warnings from build logs, enable warning options of the Java compiler.
In Maven
Enable the showWarnings and showDeprecation flags. Add the -Xlint:all flag to get all warnings. Check the javac manual if you only want to enable specific warnings.
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<showDeprecation>true</showDeprecation>
<showWarnings>true</showWarnings>
<compilerArgs>-Xlint:all</compilerArgs>
</configuration>
</plugin>
In Gradle
Add the -Xlint:all flag for the Java compiler to get all warnings. Check the javac manual if you only want to enable specific warnings.
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.