Code example of equivalence between instanceof and class in Java

This paper mainly studies the equivalence between instanceof and class in Java, as follows.

The instanceof operator in Java is used to indicate whether an object is an instance of a specific class at run time. Instanceof returns a Boolean value to indicate whether the object is an instance of the specific class or its subclass.

Instance 1 (instanceof)

Interface person

Implementation class people

Subclass Xiaoming:

Main function

Note: the code in the above 2 will not report an error during compilation.

Operation results:

Example 2

The output is as follows:

The following conclusions can be drawn from the above tests:

summary

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