java.util.scanner Archives

How can I read input from the console using the Scanner class in Java?

How could I read input from the console using the Scanner class? Something like this: System.out.println("Enter your username: "); Scanner = input(); // ...

May 24, 2022
0 Comments

Scanner vs. BufferedReader

As far I know, the two most common methods of reading character-based data from a file in Java is using Scanner or BufferedReader. ...

May 15, 2022
0 Comments

Scanner is skipping nextLine() after using next() or nextFoo()?

I am using the Scanner methods nextInt() and nextLine() for reading input. It looks like this: System.out.println("Enter numerical value"); int option; option = ...

April 19, 2022
0 Comments

Exception in thread “main” java.util.NoSuchElementException

You close the second Scanner which closes the underlying InputStream, therefore the first Scanner can no longer read from the same InputStream and a NoSuchElementException results. The solution: For console apps, use ...

April 8, 2022
0 Comments

NoSuchElementException with Java.Util.Scanner

NoSuchElementException Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration. http://docs.oracle.com/javase/7/docs/api/java/util/NoSuchElementException.html How about this : if(input.hasNextInt() ...

April 8, 2022
0 Comments

Rock, Paper, Scissors Game Java

I would recommend making Rock, Paper and Scissors objects. The objects would have the logic of both translating to/from Strings and also “knowing” ...

April 8, 2022
0 Comments

Why am I getting InputMismatchException?

Here you can see the nature of Scanner: double nextDouble() Returns the next token as a double. If the next token is not a float ...

April 7, 2022
0 Comments

Scanner vs. BufferedReader

April 7, 2022
0 Comments

What’s the difference between next() and nextLine() methods from Scanner class?

I always prefer to read input using nextLine() and then parse the string. Using next() will only return what comes before the delimiter (defaults to whitespace). nextLine() automatically moves ...

April 7, 2022
0 Comments

java.util.NoSuchElementException: No line found

with Scanner you need to check if there is a next line with hasNextLine() so the loop becomes while(sc.hasNextLine()){ str=sc.nextLine(); //... } it’s readers that return ...

April 7, 2022
0 Comments