Web Reference: Jan 20, 2026 · An abstract method is a method declared without an implementation (i.e., a body). It only defines the method signature, and subclasses must provide the implementation. Learn how to declare and use abstract methods and classes in Java, and how they differ from interfaces. See examples of abstract classes and methods in the JDK and a drawing application. Learn how to use the abstract keyword to create abstract classes and methods in Java. Abstract classes are restricted and cannot be used to create objects, but they can be inherited from. Abstract methods do not have a body and the subclass must provide it.
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