Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

    public static boolean checkString(String string) {
        String check = "^[0-9A-Za-z_]{6,20}$";
        Pattern regex = Pattern.compile(check);
        Matcher matcher = regex.matcher(string.trim());
        boolean isMatched = matcher.matches();
        return isMatched;
    }
}