How can I suppress javac warnings about deprecated api?

Question

When I compile, javac outputs:

Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.`

Answer 1

When using gradle you can configure it easily:

tasks.withType(JavaCompile) {
    options.deprecation = false
}

(tested with Gradle 2 and Java 8)