if a String starts with a digit or uppercase letter

          

import java.util.regex.Pattern;

public class Main {
  public static void main(String[] argv) {
    System.out.println(startsWithDigitOrUpper("asdf1234"));
  }

  static boolean startsWithDigitOrUpper(String s) {
    return Pattern.compile("^[A-Z0-9]").matcher(s).find();
  }
}
//false

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if a String starts with a digit or uppercase letter : String search « Data Type « Java

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