What is the difference between abstract class and interface in java

The differences are as follows:

Abstract class:

1. Abstract classes are modified with abstract;

2. Abstract classes cannot be instantiated. , that is, the new keyword cannot be used to instantiate an object;

3. Classes containing abstract methods (methods modified with the abstract keyword) are abstract classes and must be modified with the abstract keyword;

4. An abstract class may or may not contain abstract methods. An abstract class may have specific methods;

5. An abstract method in an abstract class only has a method body and no specific implementation;

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Interface:

1. The interface is modified with interface;

2. The interface cannot Be instantiated;

3. A class can implement multiple interfaces;

4. The methods in the interface are abstract methods;

5. The interface cannot contain instances Or static methods (static methods must be implemented, methods in interfaces are abstract methods and cannot be implemented).

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