Exercises

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

  1. Create an applet with a text field and three buttons. When you press each button, make some different text appear in the text field.
  2. Add a check box to the applet created in Exercise 1, capture the event, and insert different text into the text field.
  3. Create an applet and add all the components that cause action( ) to be called, then capture their events and display an appropriate message for each inside a text field.
  4. Add to Exercise 3 the components that can be used only with events detected by handleEvent( ). Override handleEvent( ) and display appropriate messages for each inside a text field.
  5. Create an applet with a Button and a TextField. Write a handleEvent( ) so that if the button has the focus, characters typed into it will appear in the TextField.
  6. Create an application and add to the main frame all the components described in this chapter, including menus and a dialog box.
  7. Modify TextNew.java so that the characters in t2 retain the original case that they were typed in, instead of automatically being forced to upper case.
  8. Modify CardLayout1.java so that it uses the Java 1.1 event model.
  9. Add Frog.class to the manifest file shown in this chapter and run jar to create a JAR file containing both Frog and BangBean. Now either download and install the BDK from Sun or use your own Beans-enabled program builder tool and add the JAR file to your environment so you can test the two Beans.
  10. Create your own Java Bean called Valve that contains two properties: a Boolean called “on” and an integer called “level.” Create a manifest file, use jar to package your Bean, then load it into the beanbox or into your own Beans-enabled program builder tool so that you can test it.
  11. (Somewhat challenging) Change Menus.java so that it handles cascading menus.
A



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  • Your email address will not be published.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

  • On-demand Event Event Date: January 28, 2015 Check out this webcast and join Jeff Sloyer, IBM Developer Evangelist and Master Inventor, for a tutorial for building cloud-based applications. Using IBM's platform as a service, Bluemix, Jeff will show you how to architect and assemble cloud-based applications built for cloud scale. Leveraging the power of microservices, developers can quickly translate monolithic applications to a cloud-based microarchitecture. This hour-long session introduces the concepts and …

  • Enterprise endpoint backup can satisfy data collection and preservation requirements in a more streamlined and cost-effective manner than traditional e-discovery methods. Enterprise IT teams face increasing challenges as the amount of valuable data living on endpoints continues to grow. Due to the exploding volume, mobility and compliance requirements of enterprise data, the need to collect and preserve that data for the purpose of e-discovery becomes more critical--and more difficult. Traditionally, …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date