java - 如何使用反射动态获取调用者实例的实例

Question

我正在使用 Swing 应用程序。

public class Owner extends JPanel{
  Child child=null;
  public Owner(){
   child=new Child();
  }
}

public  class Child extends JPanel{
   public Child(){
     // Here I want the instance of Owner class.
     // This child class is being created from many classes(almost 1000) like the Owner class.
   }
}

我想要某种方法来获取调用类实例的实例，也许使用反射。 这样我就可以将 KeyListener 与每个实例关联起来。 这是必需的，否则我必须在所有 1000 个类中编写相同的代码。

我的所有类都扩展了JPanel，一旦组件与父组件关联，我就可以从Parent属性获取父组件。但在这里我需要它在 Child 的构造函数中，即该组件尚未与 Owner 关联。

Answer 1

public class Owner extends JPanel{
 Child child=null;
 public Owner(){
 child=new Child(this);
 }
}

public  class Child extends JPanel{
    Object owner ;
    public Child(Object owner ){
       this.owner = owner ;
      // Here I want the instance of Owner class.
      // This child class is being created from many classes(almost 1000) like the       Owner class.
    }
 }