Practicing with ArrayLists

Introduction

The goal of this lab is to practice working with ArrayLists by completing a Document class that represents a text document as an ArrayList of String objects, where each entry in the ArrayList corresponds to a single line of text.

Since we will be working with a command-line Java application, you should not use Eclipse for this lab. You can edit the Java files using the gedit text editor and compile your code in the terminal. The Web-CAT submission tests for this lab won't run Checkstyle, so you don't need to worry about low-level formatting issues.

As a reminder, you can follow the following steps to compile and execute a Java program in the terminal:

$ cd the_directory_where_your_code_is_stored
$ javac File1.java File2.java ...
$ java File1

This example assumes that File1.java contains the main method for the application.

Resources

Useful API documents:

• java.util.ArrayList
• java.lang.String

Files

The following files are provided:

• Document.java UNFINISHED
• DocumentTestDriver.java This is a simple driver class for testing Document.java. Take a minute to look over this code to get a better idea of the expected behavior.
• Editor.java This is an editor application that provides a command-line interface to the Document class.

Instructions

Download the files above and complete Document.java so that all methods conform to the Javadoc comments. Test your completed file by running the two provided application programs.

Your solution should use only enhanced for loops.

Submitting

Submit your completed version of Document.java through Web-CAT. Style checking is turned off, and you have an unlimited number of submissions. If you have trouble with your submission, you may find it helpful to look at the JUnit submission tests: DocumentTest.java.