Java by API/java.lang/SecurityManager

extends SecurityManager

 

public class Main{
  public static void main(java.lang.String[] args) {
    System.out.println("in " + new CurrentClassGetter().getClassName() + " class");
  }
}
 class CurrentClassGetter extends SecurityManager {
  public String getClassName() {
    return getClassContext()[1].getName();
  }
}