Core Java: Terminating Program

System.exit(int exitCode): You could invoke the method System.exit(int exitCode) to terminate the program and return the control to the Java runtime. By convention, return code of zero indicates normal termination; while a non-zero exitCode indicates abnormal termination. For example,

 

if (errorCount > 10) {

   System.out.println("too many errors");

   System.exit(1);  // Terminate the program

}

 

The return statement: You could also use a "return returnValue" statement in the main() method to terminate the program and return control back to the Java Runtime. For example,

 

public static void main(String[] args) {

   ...

   if (errorCount > 10) {

      System.out.println("too many errors");

      return;  // Terminate and return control to Java Runtime from main()

   }

   ...

}