Social control theory. In criminology, social control theory proposes that exploiting the process of socialization and social learning builds self-control and reduces the inclination to indulge in behavior recognized as antisocial.
A simple call to the close() method will do the job. If you close the Connection object first, it will close the PreparedStatement object as well. However, you should always explicitly close the PreparedStatement object to ensure proper cleanup. For a better understanding, let us study Prepare-Example Code.
Why do we call the thread object's start() method which in turns calls run() method. No it doesn't. start() calls the operating system, which starts a new thread, which (to simplify greatly) calls the run() method. Meanwhile the start() method has already returned to its caller. They are not equivalent.