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In Java, what is the difference between an Interface and an Abstract class?

April 26, 2017abstract class difference interface Java

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In Java, what is the difference between an Interface and an Abstract class?

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An Abstract class declares have at least one instance method that is declared abstract which will be implemented by the subclasses. An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior.