www.pudn.com > ThinkinginJava4thEdition(SourceCode).zip > PasswordUtils.java

//: 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 prevPasswords, String password) { 
    return !prevPasswords.contains(password); 
  } 
} ///:~