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What is an interface in Java?

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Software Developer with 5+ years of Experience in Java spring boot back-end development

Interface is class in which for the methods present inside the interface we don't provide implementation. Interface is used to achieve 100% abstraction and multiple inheritance in java
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Software graduate from Mumbai university with 4+years of teaching experience

In java, interface is an abstact class that defines methods which needs to be implemented by the class that implements it
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Software Engineer & Programmer, Educator

Well, Interface as the meaning of interface provides the interaction between the different class objects that may have similar properties. Interface is a way to provide abstraction in Java. For example tiger and a plant both eat to make energy, although use different methods. eating is common property...
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Well, Interface as the meaning of interface provides the interaction between the different class objects that may have similar properties. Interface is a way to provide abstraction in Java. 

For example tiger and a plant both eat to make energy, although use different methods. eating is common property of both tiger and plant. one is animal and one is plant. so their parent class would be animal and plant classes, separate from each other. the interface would be eating. 

now because interface eat is connected with both the object tiger and plant. they can share the same properties, yet in different way according to their class. 

So interface also provide a type of abstraction.

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