package pokemon; import java.util.regex.Matcher; import java.util.regex.Pattern; import com.mysql.cj.jdbc.exceptions.PacketTooBigException; public class RegexHelper { public static boolean checkAlphaNumericInput(String str) { Pattern pattern=Pattern.compile("^[A-Za-z0-9]{1,}$",Pattern.CASE_INSENSITIVE); Matcher matcher=pattern.matcher(str); return matcher.find(); } public static boolean checkChatInput(String str) { Pattern pattern=Pattern.compile(":",Pattern.CASE_INSENSITIVE); Matcher matcher=pattern.matcher(str); return !matcher.find(); } }