Is multiple inheritance allowed in java? Why?

Multiple inheritance is not allowed in Java for the following reasons: Ambiguity problem: When inheriting from multiple parent classes, it is impossible to determine which parent class method the method with the same name calls. Diamond inheritance problem: When inheriting from two classes with a common parent class, multiple copies of the parent class will be created, violating the principle of "an object belongs to only one class" in Java. Solution: Use interface inheritance to achieve effects similar to multiple inheritance, avoid ambiguity and diamond inheritance problems, and decouple code.

Is multiple inheritance allowed in Java?

No, multiple inheritance is not allowed in Java.

Reason:

Multiple inheritance allows a class to inherit from multiple parent classes at the same time. This will lead to the following problems:

• Ambiguity: When a class inherits from multiple parent classes, it is impossible to determine which method to call for an overridden method of the same name.
• Diamond inheritance problem: When a class inherits from two classes that have a common parent class, it will cause the instance to have multiple copies of the parent class, which violates the principle of "an object in Java" Belongs only to one category" principle.

Solution:

In order to solve the problem of multiple inheritance, Java introduced interface inheritance. An interface is a special class that only contains method declarations, not implementations. A class can achieve effects similar to multiple inheritance by implementing multiple interfaces.

Compared with multiple inheritance, interface inheritance has the following advantages:

• Avoid ambiguity: Methods in the interface are not implemented and therefore will not override the parent Methods in the class.
• Avoid the diamond inheritance problem: The interface is a special class, so no additional copies of the parent class are introduced.
• Decoupled code: Interfaces allow behavior to be separated from implementation, making the code more flexible and maintainable.

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