问题
Is it possible to get an object that invoked static method in this method?
I have this code:
class A{
static void foo(){
}
}
A a = new A();
a.foo();
Can I get instance a in method foo() ?
回答1:
Firstly, your code isn't good as a programmer.
It is because static methods are class-level methods and should be called without any instance of class.
Recommended approach :
class A{
static void foo(){
}
}
A.foo();
Can I get instance a in method foo() ?
Nope, you can't. Because foo() is declared as static. So you can't use this inside that method, since this contains a reference to the object that invoked the method.
回答2:
By definition, there is no instance object for a static method (static methods do not operate on a specific object, they are defined within a class purely for namespacing) -- so no.
回答3:
No is impossible...the static method don't have the reference, you have to pass it reimplementing the method as:
class A{
static void foo(A theObject){
}
}
A a = new A();
A.foo(a);
and is better don't call the static method from the instance of the object
回答4:
No; that's what static means.
The compiler actually completely ignores the instance.
Use an instance method.
来源：https://stackoverflow.com/questions/6667115/reflection-get-invocation-object-in-static-method