Begin

I was unexpectedly caught

@Singleton
class Test{
@I have a=new pen('yeah');
}

Suppose there is such a class

Test test=Test.getInstance();//error

This doesn't bring an instance of the Test class. Why

Conclusion

There is a method that can be accessed like Groovy in Java, so use that.

Test test=(Test)InvokerHelper.getProperty(Test.class,"instance");//OK

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