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Frequently Asked Questions

• Is there a class to write text files?

  FileWriter is a convenient class for writing text files using the default character encoding of the operating system.

• Is it free to use read and write?

  Free access to all Read&Write features for 30 days - ideal for teachers or parents who want to try Read&Write. Experience a full roll-out of Read&Write for a large group of users. Includes access to all premium features and implementation materials.

• How are characters encoded in a OutputStreamWriter?

  OutputStreamWriter is a bridge from byte streams to character streams. Characters are encoded into bytes using a specified charset. The charset can be default character encoding of the operating system, or can be specified explicitly when creating an OutputStreamWriter.

• What does read and write do for You?

  Read&Write helps to level the playing field at assessment time. It provides a supportive writing environment, designed for locked down (kiosk mode) testing scenarios or where the Respondus lock down browser is needed. How much does Read&Write cost?

• What do you need to know about Java Authentication and authorization service?

  Java Authentication And Authorization Service (JAAS) is a Java SE low-level security framework that augments the security model from code-based security to user-based security. We can use JAAS for two purposes: Authorization: Once authenticated, ensure that this entity has the required access control rights or permissions to execute sensitive code

• Where are usernames and passwords saved in Java?

  The saved usernames and passwords are in a .txt file. username and corresponding password are separated by a space, the following username is on a next line. The program takes the input from the user through text fields and compare them to the content from the .txt file.

• How to use JAAS to gather username and password?

  It has a single method, handle (), that accepts an array of Callback s. In addition, JAAS already provides many Callback implementations, and we'll be using the NameCallback and PasswordCallback for gathering the username and password, respectively.

• When does authorization come into play in Java?

  Authorization comes into play when the user is first connected and associated with the AccessControlContext. Using the Java security policy, we can grant one or more access control rights to Principals. We can then prevent access to sensitive code by calling the SecurityManager#checkPermission method: 7.1. Defining Permissions