So annotations are quite helpful if you use them to their full potential. If they transfer null it will cause exception during compilation or before executing a single line method's code. They show other programmers when they use your code so that can transfer null as a certain parameter to a method or not. For example with IntelliJ Idea IDE annotation processor you can use and annotations. There are also annotation processors that you integrate into your program build process to ensure that program code meets some sort of criteria. This is helpfull when your project compiler have a compilation flag -Xlint and you cannot (or don't want to) change that. There is a deprecation suppression with unsafe type casting with and some others. And if you compile your program with the flag -Xlint compilation process will return with an error unless you remove all usages of deprecated code or explicitly mark them with annotation is used to suppress warnings (yes, I know it's Captain Obvious style :)). So they (developers) would think about moving onto another (updated) set of functions. This annotation helps compiler to ensure that you code everything correctly and in this way it helps annotation doesn't make program not to compile but it makes developers think about using the code that can and/or will be removed in a future releases.
MyString extends String Įquals(MyString str) is not overriding the method equals(Object o) and therefore will not be used by standard Java comparators (which is used in some standard functions, such as ntains() and this is prone to error situation). Common mistakes here consist of:Įqual(Object o) instead of equals(Object o) Annotations are annotation is used to make sure that you are overriding method of a superclass and not just making a method with the same name.
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