Java中的对象修改

Question

给出以下对象构造函数：

public class Reservation {

 private int roomNum;
 private int numPeople;
 private int endTime;

 public Reservation() {
 this.roomNum = 100;
 this.numPeople = 100;
 }

 public Reservation(int roomNum, int endTime) {
 this.roomNum = roomNum;
 this.numPeople = 30;
 this.endTime = endTime;
 }

还有物体

Reservation a = new Reservation();
Reservation c = new Reservation(309, 12);

如果我设置

a = c; 
a.addTime(2) // adds number of hours to endTime

从a.endTime到12的{​​{1}}变更还是会影响14？如果是这样，为什么？

Answer 1

a =c之后，绑定到的原始对象已丢失，将被垃圾回收。 a与c拥有相同的对象。