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java Programming Glossary: hasnextintHow to insist that a users input is an int? http://stackoverflow.com/questions/13115266/how-to-insist-that-a-users-input-is-an-int java util scanner share improve this question Scanner.hasNextInt returns true if the next token is a number returns false otherwise... a number returns false otherwise. In this example I call hasNextInt . If it returns true I go past the while and set the input if.. repeat. Scanner scan new Scanner System.in while scanner.hasNextInt scanner.next int input scan.nextInt share improve this answer..
How do I keep a scanner from throwing exceptions when the wrong type is entered? (java) http://stackoverflow.com/questions/2496239/how-do-i-keep-a-scanner-from-throwing-exceptions-when-the-wrong-type-is-entered hasNext methods that Scanner has for pre validation. if in.hasNextInt int a in.nextInt System.out.println a else System.out.println.. match before you read it. java.util.Scanner API boolean hasNextInt Returns true if the next token in this scanner's input can be.. that was skipped. Do keep in mind the sections in bold. hasNextInt doesn't advance past any input. If it returns true you can advance..
Validating input using java.util.Scanner http://stackoverflow.com/questions/3059333/validating-input-using-java-util-scanner does it have another line of input For Java primitives hasNextInt does it have a token that can be parsed into an int Also available.. Validating positive ints Here's a simple example of using hasNextInt to validate positive int from the input. Scanner sc new Scanner.. System.out.println Please enter a positive number while sc.hasNextInt System.out.println That's not a number sc.next this is important..
Is there an equivalent to the Scanner class in C# for strings? http://stackoverflow.com/questions/722270/is-there-an-equivalent-to-the-scanner-class-in-c-sharp-for-strings currentWord sb.ToString else currentWord null public bool hasNextInt if currentWord null return false int dummy return int.TryParse..
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