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Teach Yourself Java in 21 Days, Eighth Edition

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Day 17: Communicating Across the Internet

Notes and Corrections

• Certification Practice quiz solution.

Source Files

• ChangeBuffer.class
• ChangeBuffer.java
• Finger.class
• Finger.java
• FingerServer.class
• FingerServer.java
• GetFile.class
• GetFile.java
• LoadURL.class
• LoadURL.java
• PageFrame$1.class
• PageFrame.class
• RandomWeb.class
• RandomWeb.html
• RandomWeb.java
• RandomWebPlugIn.html
• TimeServer.class
• TimeServer.java
• WebButton.class
• WebMenu.class
• WebMenu.html
• WebMenu.java
• agore.plan
• friends.dat
• gwbush.plan
• rcade.plan

Reader Questions

• None.

Activities

• Solution 1: RandomWeb.java, RandomWeb.class, WebButton.class, and RandomWeb.html. To see this applet in a Web browser using the Java Plug-in, open RandomWebPlugIn.html. (One word of caution: Because this applet opens randomly selected domains with three-letter names when you click a button, you may encounter sites that are adult-oriented or otherwise indelicate.)
• Solution 2: FingerServer.java, FingerServer.class, agore.plan, gwbush.plan, and rcade.plan. To run this application on a Windows system, open an MS-DOS window and type java FingerServer at a command line. You can test the server using the Finger program you created during Day 17. Open a second MS-DOS window and use one of the following commands:
  • java Finger agore@localhost
  • java Finger gwbush@localhost
  • java Finger rcade@localhost