Java post-class jobs

Source: Internet
Author: User

1. Summarize the rules of Java field initialization

Initializing unassigned will output the object's most recently defined value, and the initialization assignment will give the output a worthwhile size.

2. When there is an inheritance relationship between multiple classes, creating a subclass object causes the parent class to initialize the execution of the block.

3. Using the class's static fields and constructors, we can track the number of objects created by a class. Write a class that can query it at any time "how many objects have you created?"

Java post-class jobs

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