3.9 this Keyword

1. Exam Points

• this keyword refers to the current object of a class.
• this can be used to distinguish an instance variable from a local variable with the same name.
• this can be used to pass the current object as an argument to a method.
• this can not be used in a static method.
• Note:
  • pay attention to in which class this keyword is used.

2. Knowledge Points

(1) this Keyword

• Within an instance method or a constructor, the keyword this acts as a special variable that holds a reference to the current object — the object whose method or constructor is being called.
• Class methods do not have a this reference, meaning that you can not use the this keyword in a class method.
• this keyword can be used to distinguish an instance variable from a local variable with the same name.
  • Example:
    
• The keyword this can be used to pass the current object as an argument in a method call.
  • Example:
    

3. Exercises

• Practice
• Solution