Check if given string is a number (digits only) : Digit Number « Regular Expressions « Java






  1. Java
  2. Regular Expressions
  3. Digit Number

Check if given string is a number (digits only)

 
public class Main {

  public static boolean isNumber(String string) {
    return string.matches("^\\d+$");
  }

  public static void main(String[] args) {
    System.out.println(isNumber("123"));
  }
}








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