17571/how-to-check-if-a-string-has-only-letters
The point is to have a String read and to verify if it contains only letters. For example "qwerty123" would not be acceptable.
You could probably use Java 8 lambda expressions, they are fast and simple.
boolean allLetters = someString.chars().allMatch(Character::isLetter);
Check if a string is numeric public class ...READ MORE
You can also use regular expression. str.matches("-?\\d+"); It will ...READ MORE
str != null && str.length() != 0 alternatively str ...READ MORE
Hi@akhtar, The first and foremost way to check ...READ MORE
There doesn't seem to be a String.contains() ...READ MORE
You can use this method: String[] strs = ...READ MORE
In Java 8 or earlier: List<String> string = ...READ MORE
In Java 9 you can use: List<String> list= List.of("Hello", "World", ...READ MORE
Java 8 Lambda Expression is used: String someString ...READ MORE
The following code will perform your desired ...READ MORE
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