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Java For Users - Installing Java

Maybe you aren't interested in programming in Java, but rather in using Java to run programs other people wrote. Chances are you already have Java installed on your computer many software packages install Java for you, including most web browsers. However, it is possible that you do not have it or that you do not have the latest version. Installing Java to run programs, what is called the Java Runtime Environment, or checking that you have the latest version is very simple you just point your browser at http://www.java.com. And it's free! Although the content of the page changes from time to time, it always includes a button right at the top of the page to download the latest version of Java.

Java.com homepage showing the Download button


You'll also notice that there is a link labeled "Do I have Java?" If you click on this link, you will be redirected to a page that determines whether or not you have Java installed, and if you do whether or not it is the latest version. If it isn't the latest version, it will display a download button. Whether you use this download button or the one on the first page, you will be sent to the same page, which allows you to download the correct version for your operating system and includes browser specific information to walk you through the download. For instance, if you use Internet Explorer on Windows XP you'll see a page like this:

window showing the download page for Java using IE on Windows XP


Depending on your browser, it may automatically start downloading for you or you may need to click on a button to start the download. Either way, from then on it, you just follow the step by step instructions on the page to install Java.

If you are upgrading your Java installation, at some point you may see a pop-up window similar to the following:

Upgrading Java Applet cache pop-up


This is an information message that comes up if you have web pages with Java applets open when you upgrade your Java installation, you don't have to do anything, just let it run.

After you install Java, you will see a button that allows you to verify your installation. You definitely want to verify your installation. If you click on the button, you will see a window similar to the following:

window showing option to verify Java installation


If you want to be sure that you get trustworthy, up to date results, you should close all your browser windows, reopen your browser and then go back to http://www.java.com and click on the "Do I have Java link?" If you are like me, you will just click on the verify button and see if it shows that the latest version is correctly installed, if it doesn't then I go back and restart my browser and check again. If you still have problems, there is a link on the verify page to help you figure out how to fix it. Either way, once you have Java installed correctly, you'll see a window like the following:

window showing Java installation verification


Enjoy using Java!

References

www.java.com

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