This keyword is simple to apply

1 classPersonDemo32 {3      Public Static voidMain (string[] args)4     {5Person p=NewPerson ("Zhang San", 22);6     }7 }8 9 /*Ten This statement One 1. Used when calling each other between constructors, cannot be called in a generic function A The 2.this statement must be the first sentence in the constructor and can be used only once in a constructor - */ - //The This keyword denotes the object where the function is located, which marks the members of the object, avoids ambiguity and errors, and facilitates reading the class Person - { -     Private intAge ; -     PrivateString name; +Person ()//no parameter constructor -     { +System.out.println ("A:name:" + This. name+ "," + "Age:" + This. age); A          at     } -Person (String name)//a parameter constructor -     { -          This. name=name; -         //System.out.println ("B:name:" +this.name+ "," + "Age:" +this.age); -          in     } -Person (String name,intAge//two parameter constructors to     { +         //This.name=name; -          This(name);//call the constructor with the this statement the          This. age=Age ; *System.out.println ("C:name:" + This. name+ "," + "Age:" + This. age); $         Panax Notoginseng     } -}

Output Result:

C:name: Zhang San, age:22

This keyword is simple to apply