Is there a way to invert a switch for example switch (!(x))? I’m writing a program and I only want the user to be able to input certain letters. If they input an invalid letter, they would have to input it again. I’m trying to use a switch for this avoiding doing something like because the number of valid inputs
Tag: switch-statement
How to use null in switch
In the code above I can’t use null in the switch case statement. How can I do this differently? I can’t use default because then I want to do something else. Answer This is was not possible with a switch statement in Java until Java 18. You had to check for null before the switch. But now, with pattern matching,
How do I use a char as the case in a switch-case?
How do I use a character in a switch-case? I will be getting the first letter of whatever the user inputs. Answer
Java switch statement multiple cases
Just trying to figure out how to use many multiple cases for a Java switch statement. Here’s an example of what I’m trying to do: versus having to do: Any ideas if this possible, or what a good alternative is? Answer Sadly, it’s not possible in Java. You’ll have to resort to using if-else statements.
Count words, java
I want to count words. I use the methods hasNextChar and getChar. The sentence may contain all kind of chars. Here’s my code: It works so far but e.g. when I have a ” . ” at the end it gives me 8 instead of 7 words. Here are some examples of sentences: *„Schreiben Sie ein Praktikanten-Vermittlungs-Programm“ – words: 6
Why can’t I use switch statement on a String?
Is this functionality going to be put into a later Java version? Can someone explain why I can’t do this, as in, the technical way Java’s switch statement works? Answer Switch statements with String cases have been implemented in Java SE 7, at least 16 years after they were first requested. A clear reason for the delay was not provided,