11.10 Map

src/annotations/PasswordUtils.java

@@ -0,0 +1,20 @@
+package annotations;//: annotations/PasswordUtils.java
+import java.util.*;
+
+public class PasswordUtils {
+  @UseCase(id = 47, description =
+  "Passwords must contain at least one numeric")
+  public boolean validatePassword(String password) {
+    return (password.matches("\\w*\\d\\w*"));
+  }
+  @UseCase(id = 48)
+  public String encryptPassword(String password) {
+   return new StringBuilder(password).reverse().toString();
+  }
+  @UseCase(id = 49, description =
+  "New passwords can't equal previously used ones")
+  public boolean checkForNewPassword(
+    List<String> prevPasswords, String password) {
+    return !prevPasswords.contains(password);
+  }
+} ///:~