Validate password in java that must have atleat 1 uppercase char, 1 number and 1 special char in it and can be of 6 to 20 character in size.

pass_validator.java

package com.hprog99;
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class TestPasswordValidator {
 
private static Pattern passPattern =
        Pattern.compile("((?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%_*]).{6,20})");
     
    public static boolean validatePassword(String pwd){
        Matcher matcher = passPattern.matcher(pwd);
        return matcher.matches();
    }
     
    public static void main(String pwds[]){
        System.out.println("Admin2@ - "
                            +validatePassword("Admin2@"));
        System.out.println("123HNG89# - "
                            +validatePassword("123HNG89#"));
        System.out.println("f54A# - "
                            +validatePassword("f54A#"));                    
    }
}

//Output:
//1. Admin2@ - true
//2. 123HNG89# - false
//3. f54A# - false