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Karol Lotkowski

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class

Use @Deprecated Java class without compilation warning

The first rule of using deprecated classes is to do not use deprecated classes. If you have to use such class then double check how to avoid such situation and find newer implementation of deprecated class (most of the time the new alternative solution is provided). But if you really forced to use deprecated class (e.g. 3rd-party library) then during class compilation (compileJava and compileTestJava Gradle tasks) you will get below warning:

Note: <path_to_your_class_where_deprecated_class_is_used>.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

I will show you few solutions how to disable this warning.

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How to test abstract class in Java?

It’s not a problem to test class for which you can create an instance and execute implemented methods. Little problem starts when you would like to test class without an instance of this class. My way to test abstract classes is to create instance of the class as a mock via Mockito and simulate the behaviour.

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