Installing The Java Developer s Kit (JDK) and Java Runtime Environment (JRE).

Transcription

1 Installing The Java Developer s Kit (JDK) and Java Runtime Environment (JRE). Java is a non-platform specific program that requires specialized installation to be easily accessible from a Windows Environment. You will first install the files from Sun s Java Website, and then you will set up your Windows system to provide quick access to both your file directory and your command-line environment. Please follow these instructions carefully! 1. Open your browser and go to fig.1

2 2. Select the correct link for your operating System. For Windows, choose the link shown. 3. When the licensing agreement appears, read and accept it. fig.2 4. Save the software to your system.

3 fig Make note of the version of Java that you are downloading. You will need this information to set up the Path in later steps. 6. After the download is completed, double-click on the icon to begin the installation. fig.4 7. The screen will now display a Security Warning. There is no danger to your computer; simply select RUN to start the setup. If you do not receive this notice, go to the next step. fig 5.

4 8. Read and accept the License Agreement. fig The software installation option screen will then open.. Accept the Install to: path, and again, make note of this directory. Click on Next fig Select the browser for the Java installation. If you have more than one, choose Internet Explorer. Press Install

5 fig The Java software and Java Runtime Environment will now be installed. 12. When the installation is complete, select Finish. Creating a Working Environment 13. Open the My Computer folder. 14. Open your C:> Drive folder. 15. Right-click your mouse, and choose the option NEW, then FOLDER. fig Name the new folder Java Working Directory. 17. Close the C:> drive folder and the My Computer folder. 18. Return to the Desktop. 19. Right-click the mouse, and choose NEW, then SHORTCUT. 20. Name the shortcut C:\Java Working Directory. (Include the quotation marks in this instance. It will allow Windows to recognize the spaces between the words.) 21. Click NEXT, and then FINISH. 22. The Java Working Directory folder will now appear on your desktop.

6 fig Return to the Desktop 24. Right-click the mouse, and choose NEW, then SHORTCUT. 25. Enter the command line: CMD.EXE fig Click NEXT. 27. Name the shortcut Java Environment.

7 fig The Java Environment icon will now appear on your desktop. 29. Right-click on the Java Environment icon. 30. Click on Properties. The Properties window will open. fig Click on the Program tab. 32. Set the program properties to match figure 14 exactly.

8 Fig Next, select the SCREEN tab. Make sure the setting match those in figure 15. fig When the settings are correct, click on APPLY. 35. Close the Properties Window. Setting the PATH under Windows XP:

9 1. Click on START 2. Under "Settings" click on "Control Panel" 3. Switch to "Classic View" (upper left side of window) 4. Click on the "System" icon. 5. Click on the "Advanced" tab. 6. Click on the "Environment Variables" button (bottom center of window). 7. Highlight "PATH" (in the top window) and click the "edit" button. NOTE: YOU SHOULD NOT EDIT OR MODIFY THE "SYSTEM VARIABLES ; modify the User Variables instead. 8. Edit the "PATH" so it begins C:\Program Files\Java\jdk1.5.0_02\bin; 9. (note: if you install Java into a different directory, you may need to change the directory from that listed above) 10. After you have finished editing the PATH, click "OK". You are done setting your PATH. Now you have to create a new variable, called your CLASSPATH. 11. Click on the "NEW" button below the top window. 12. Under 'variable name' type CLASSPATH 13. Under 'variable value' type. (a single period). 14. Click OK. 15. EXIT the control panel. 16. Restart your computer. 17. Test your installation by opening up the Java Environment window and verifying that both the commands "java" and "javac" are recognized. Setting the CLASSPATH under Windows XP NOTE: If a command is given in quotes for you to type, DO NOT TYPE THE QUOTES

10 18. Click on START (lower left) 19. Under "Settings" click on "Control Panel" 20. Switch to "classic view" (upper left) -- not "category view" 21. Click on the "System" icon. 22. Click on the "Advanced" tab. 23. Click on the "Environment Variables" button (bottom). 24. Now you have to create a new variable, called your CLASSPATH. 25. Click on the "NEW" button below the top window. 26. Under 'variable name' type CLASSPATH 27. Under 'variable value' type. (a single period). 28. Click OK. 29. EXIT the control panel. 30. Restart your computer. 31. Test your installation by opening up a DOS window and verifying that both the commands "java" and "javac" are recognized. Alternative method of creating a path/classpath: Create an AUTOEXEC.BAT file : 1. Click on START 2. Click on RUN 3. Where is says "open" type in "CMD" and click OK. This will open a DOS prompt. 4. Type "cd c:\" 5. Type "notepad autoexec.bat" -- this will bring up the notepad editor. 6. In this editor type the following two lines: set PATH=%PATH%;C:\Program Files\Java\jdk1.5.0_02\bin; set CLASSPATH=. 7. Exit notepad. 8. Restart your system. Good luck in your Java Programming Course!