Detailed explanation of this keyword in Java

In the study of Java, when you come into contact with the chapter of classes, you will inevitably come into contact with the this keyword.

First of all, the this keyword points to a reference to the current object.

Usage:

1. this. Attribute name

refers to accessing member variables in the class and is used to distinguish member variables and local variables (duplicate name problem).

2. this.Method name

is used to access the member methods of this class.

3. this()

Access the constructor of this class.

() can have parameters. If there are parameters, the specified parameterized construct will be called.

Notes:

1. this() cannot be used in ordinary methods and can only be written in constructors.

2. It must be the first statement in the constructor.

Recommended tutorial: Java tutorial

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