Pwcheckerclass

src/PasswordChecker.java

-public class PasswordChecker {
+public class PasswordChecker implements Validation{
 
-    private final static int pwMinLength = 6;
+    private final int pwMinLength;
 
-    public static boolean pwLength(String password){
+    public PasswordChecker(int minPwSize){
+        pwMinLength = minPwSize;
+    }
+
+    public boolean pwLength(String password){
         return password.length() >= pwMinLength;
     }
 
-    public static boolean pwContainsNum(String password){
+    public boolean pwContainsNum(String password){
         for (int i = 0; i < password.length(); i++) {
             if(Character.isDigit(password.charAt(i))){
                 return true;
         return false;
     }
 
-    private static boolean pwContainsSpecialHelper(char c){
+    private boolean pwContainsSpecialHelper(char c){
         return(!(Character.isDigit(c)|| Character.isLetter(c)));
     }
 
-    public static boolean pwContainsSpecial(String password){
+    public boolean pwContainsSpecial(String password){
         for (int i = 0; i < password.length(); i++) {
             if(pwContainsSpecialHelper(password.charAt(i))){
                 return true;

src/Validation.java

+public interface Validation {
+
+    boolean pwLength(String pw);
+    boolean pwContainsNum(String pw);
+    boolean pwContainsSpecial(String pw);
+}