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Application of java object-oriented array

2022-02-03 02:12:00 CSDN Q & A

The phenomenon and background of the problem



Operation results and error reporting contents

What memory address do I display

My solution ideas and tried methods
What I want to achieve

Refer to the answer 1:

Refer to the answer 2:

Refer to the answer 3:

If you print an object , The default is the memory address of the print object , If you want to display the contents of the object , Must be rewritten toString Method

public String toString(){      return " Object content ";}

Refer to the answer 4:

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