_this的使用方法--------括号留空，传的是无参数的构造函数

class Person{ String name; int age; String address; Person(){ System.out.println("无参数的构造函数"); } Person(String name, int age){ this.name = name; this.age = age; System.out.println("两个参数的构造函数") } Person(String name, int age, String address){ //括号留空，传的是无参数的构造函数 this(name,age)括号里填了东西是两个参数的构造函数 this(); this.address = address; System.out.println("三个参数的构造函数"); } void talk(){ System.out.println(" my name is" + name); } } class Person{ String name; int age; </p></div><br /><hr><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.2.1/css/bootstrap.min.css" integrity="sha512-siwe/oXMhSjGCwLn+scraPOWrJxHlUgMBMZXdPe2Tnk3I0x3ESCoLz7WZ5NTH6SZrywMY+PB1cjyqJ5jAluCOg==" crossorigin="anonymous" referrerpolicy="no-referrer" /> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.9.1/font/bootstrap-icons.min.css" integrity="sha512-5PV92qsds/16vyYIJo3T/As4m2d8b6oWYfoqV+vtizRB6KhF1F9kYzWzQmsO6T3z3QG2Xdhrx7FQ+5R1LiQdUA==" crossorigin="anonymous" 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_this的使用方法--------括号留空，传的是 无参数的构造函数

_this的使用方法--------括号留空，传的是无参数的构造函数