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Java.md

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Java

  • Always use @Override annotations when overriding a method. Due to typos or implementation changes you could end up inadvertently adding a new method instead of overriding an existing one, otherwise. Let your IDE show warnings for methods that you have not marked with @Override.
  • Always make methods static when possible, i.e. when they don't access instance variables and methods. Let your IDE show warnings for methods that should be made static.
  • When classes have supertypes, they use extends. Likewise, when interfaces have supertypes, they use extends. Only when a connection crosses the line from interfaces to classes, the class implements the interface.