Incurable diseases: In Java, scanner consecutive get int and string type error occurred.

An error occurs when using the scanner class to get input and to get int type and string type data consecutively.

New Scanner (system.in); SYSTEM.OUT.PRINTLN ("input int type"); int a = sc.nextint (); SYSTEM.OUT.PRINTLN ("input string type"= sc.nextline (); System.out.println (a); System.out.println (s);
System.out.println ("Run Complete");

Run the result, enter 5 after the return, run finished directly, the request input string is skipped .

Reason, enter 5 after the carriage return, by the system mistakenly judge is the request input s string. So the operation is complete.

Solution:

1) Use a new scanner object to get the string.

New Scanner (system.in); SYSTEM.OUT.PRINTLN ("input int type"); int a =new  Scanner (system.in); SYSTEM.OUT.PRINTLN ("input string type"= sc2.nextline (); System.out.println (a); System.out.println (s); System.out.println ("Run Complete");

2) Add a nextline () to the Nextint and do not assign a value.

New Scanner (system.in); SYSTEM.OUT.PRINTLN ("input int type"); int a = sc.nextint (); Sc.nextline ();    // do not assign, accept enter System.out.println ("Input string type"= sc.nextline (); System.out.println (a); System.out.println (s); System.out.println ("Run Complete");

Write Time: 2017-08-20 14:43:10

Modification Time: 2017-08-20 14:51:12

End

Incurable diseases: In Java, scanner consecutive get int and string type error occurred.