Summary of Common Java exceptions

Exception 1:Java.util.NoSuchElementException:No Line found

Cause: Java is executed sequentially as you execute to. Close () After you have closed the stream, it is obviously unrealistic for you to call the stream that has been closed by you. It's natural to call the Close method after each run, and when the second scanner object calls Nextline, the Nosuchelementexception:no line found exception occurs. The main problem is that system.in cannot be reopened, so it can be closed at the end of the program

Workaround: Do a few methods that contain the input stream and then call it in Main. Such as:

Summary of Common Java exceptions