When i created a new project of springboot. then changed the port number from 8080 to 8081. eventually run my application. but it doesn't work. through check and find due to not exist blank between server port and port number. like below:
After mended like below. I can run my application with port 8081 and work is fine.
Above two pictures you can see something that In last picture between port and number exist a blank . And you can see that the front colors both two pictures are different . As like last picture that is correct way to change different port to run Application.