java - 当子对象引用父对象时对象销毁

Question

这个问题已经有答案了:

How does Java Garbage Collection work with Circular References? (9 个回答)

已关闭 8 年前。

代码示例:

public class Parent{
  public void someMethod(){
    //start of some sort of loop
    Child child = new Child(this);

    //do something
    //replaces reference from old child to new child
    child = new Child(this);
    //repeats loop
  }
}

public class Child{
   Parent parent;
   public Child(Parent parent){
     this.parent = parent;
   }
}

根据我对对象生命周期的理解，如果一个对象不再被引用，那么它将有资格进行GC，就像当子引用更改为引用新的第二个子对象时一样。
< br/>但是，如果每个子对象都有一个对创建它的对象的引用，就像上面一样，那么一旦它不再被其父对象引用，在这种情况下它是否有资格进行 gc？

如果不是，我该如何写它呢？

Answer 1

根据this answer :

Java's GC considers objects "garbage" if they aren't reachable through a chain starting at a garbage collection root, so these objects will be collected. Even though objects may point to each other to form a cycle, they're still garbage if they're cut off from the root.

因此，您无需为此循环引用案例执行任何特殊操作。