浅谈Java中的this作为返回值时返回的是什么

package human;public class Person { String name; int age;  public Person() {   } public Person(String n, String g) {  name = n;  gender = g; }  //test:this作返回值 Person reThis1() {  Person per = new Person("lu","female");  System.out.println("reThis1 per:" + per.name);  return this; } Person reThis2() {  Person per = reThis1();  System.out.println("reThis2 per:" + per.name);  return this; } Person reThis3() {  name = "ma";  return this; } static void equRefer(Person per1, Person per2) {  if(per1 == per2)   System.out.println("per1指向的对象没有改变，仍与per2指向同一个对象");  else   System.out.println("per1指向的对象已改变，与per2指向不同的对象");  System.out.println("per1:" + per1.name);  System.out.println("per2:" + per2.name); }  public static void main(String[] args) {  Person per1 = new Person("liu","female");  Person per2 = per1;    per1 = per1.reThis1();  Person.equRefer(per1, per2);     per1 = per1.reThis2();  Person.equRefer(per1, per2);    System.out.println("调用reThis3之前，per1.name=" + per1.name);  per1 = per1.reThis3();  System.out.println("调用reThis3之后，per1.name=" + per1.name); }}