I have attached the screenshot for further clarrifications.
InstructorSupport Team Reply on 05/07/2019
As i can see from the screenshot provided, your project is configured to use JDK5, but you need JDK 8 to be configured.
Sir, I am using JDK 11
InstructorSupport Team Reply on 08/07/2019
Please use JDK 8, Other versions of JDK are not stable.
You can visit http://www.java.com/ for this.