How can I suppress javac warnings about obsolete api?

Question

When I compile, javac outputs:

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

I want to suppress this warning. Try -Xlint: Nothing helps.

Answer 1

From what I can say in the docs, you cannot do this on the command line.

According to javac documentation , -Xlint: no one disables warnings that "do not comply with the Java language specifications." There appears to be a warning that using outdated APIs is driven by the language specification.

Your best option is to fix the use of legacy APIs. However, an option would be to add the @SuppressWarnings("deprecation") annotation to classes or methods using legacy APIs.

Answer 2

Two possible ways:

• do not use outdated API
• Use @SuppressWarnings("deprecation")

Answer 3

For others who googled this problem and stumbled upon this thread, how I did it ...

Try: -Xlint: -deprecation

It seems to be working on JDK 6 ... not sure about the others.

Answer 4

With Java 6, neither @Depreated support nor the compiler flag will help you here. The only solution that worked for me was to add a javadoc comment with the @deprecated (small caps) tag in the deprecated method:

 /** * @deprecated overriding deprecated method */ @Override public javax.xml.bind.Validator createValidator() throws JAXBException {...} 

(An example from a class that derives from JAXBContext.)

(I did not import the obsolete Validator class to avoid a warning in the import statement.)

Answer 5

When using gradle, you can easily configure it:

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

(tested with gradle 2 and Java 8)

Answer 6

If this is the main Java API, there will almost certainly be a replacement that will do what you want. Launch javac with this optional parameter, and then look at the API for the deprecated method and replace it accordingly.

Answer 7

@SuppressWarnings("deprecation") does not work for me, instead I used

 @SuppressWarnings("unchecked") 

Answer 8

use nowarn attribute below

eg.

 <javac srcdir="src" destdir="build/classes" source="1.6" target="1.6" debug="true" encoding="Cp1252" nowarn="on"> 

nowarn attribute is disabled by default