Java review 12

Overr ide rewriting and overload Overloading

 

When an inherited relationship occurs, you can use the super keyword to reference the parent method. If you want to use a new method, you can rewrite it to meet the new function requirements.

The reload is summarized as follows:

 

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You can only define different parameter lists when using overload.

 

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The returned type, access permission, and thrown exception of the overloaded method cannot be used.

Method overload.

 

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The rewrites are summarized as follows:

 

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The override method exists in the parent class and also in the subclass.

 

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The method of rewriting adopts the form of polymorphism at runtime.

 

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The method to be rewritten cannot have higher access restrictions than the method to be rewritten.

 

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The method to be rewritten cannot have more exceptions than the method to be overwritten.

The reload is summarized as follows: • different parameter lists can be defined only when reload is used. • Methods cannot be overloaded by the return type, access permission, and thrown exceptions of the overloaded method. • Rewrite is summarized as follows: • The override method exists in the parent class and also in the subclass. • The method of rewriting adopts the form of polymorphism at runtime. • The method to be rewritten cannot have higher access restrictions than the method to be rewritten. • The method to be rewritten cannot have more exceptions than the method to be rewritten.