如何让greet函数正确返回name，youName的赋值？

Question

public class Person {
String name;

public void person(String personName) {
name = personName;
}

public String greet(String yourName) {
return String.format("Hi %s, my name is %s", name, yourName);
}
}

Answer 1

public class Person {    String name;     public void person(String personName) {            name = personName;    }     public String greet(String yourName) {            return String.format("Hi %s, my name is %s", name, yourName);    }         public static void main(String[] args) {        Person p = new Person();        p.person("haha");        System.out.println(p.greet("hehe"));    }}