Exercises

Bruce Eckel's Thinking in Java Contents | Prev | Next

  1. Create a class with a default constructor (one that takes no arguments) that prints a message. Create an object of this class.
  2. Add an overloaded constructor to Exercise 1 that takes a String argument and prints it along with your message.
  3. Create an array of object handles of the class you created in Exercise 2, but don’t actually create objects to assign into the array. When you run the program, notice whether the initialization messages from the constructor calls are printed.
  4. Complete Exercise 3 by creating objects to attach to the array of handles.
  5. Experiment with Garbage.java by running the program using the arguments “before,” “after” and “none.” Repeat the process and see if you detect any patterns in the output. Change the code so that System.runFinalization( ) is called before System.gc( ) and observe the results.

d



Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Live Event Date: October 29, 2014 @ 11:00 a.m. ET / 8:00 a.m. PT Are you interested in building a cognitive application using the power of IBM Watson? Need a platform that provides speed and ease for rapidly deploying this application? Join Chris Madison, Watson Solution Architect, as he walks through the process of building a Watson powered application on IBM Bluemix. Chris will talk about the new Watson Services just released on IBM bluemix, but more importantly he will do a step by step cognitive …

  • Live Event Date: November 13, 2014 @ 2:00 p.m. ET / 11:00 a.m. PT APIs can be a great source of competitive advantage. The practice of exposing backend services as APIs has become pervasive, however their use varies widely across companies and industries. Some companies leverage APIs to create internal, operational and development efficiencies, while others use them to drive ancillary revenue channels. Many companies successfully support both public and private programs from the same API by varying levels …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds