Set the JAVA_HOME Variable in Windows

1) Locate the JDK Installation Directory .By default it will be C:Program FilesJavajdk1.6.0_26 (Latest version at the time of writting this)

2) Right-click the My Computer icon on your desktop and select Properties.ThenClick the Advanced tab.

3) Click the Environment Variables button.Under System Variables, click New and Enter the variable name as JAVA_HOME.

4)Enter the variable value as the installation path for the Java Development Kit. If path name includes space it , replace it with ~

5)Click OK and Click Apply Changes.

6)Restart Windows.

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what is apache ant used for ?

Apache Ant is a software tool for automating software build processes. It is similar to Make but is implemented using the Java language, requires the Java platform, and is best suited to building Java projects.
The most immediately noticeable difference between Ant and Make is that Ant uses XML to describe the build process and its dependencies, whereas Make uses Makefile format. By default the XML file is named build.xml.
Ant is an Apache project. It is open source software, and is released under the Apache Software License.
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Persistent Cookie

Also called a permanent cookie, or a stored cookie, a cookie that is stored on a user s hard drive until it expires (persistent cookies are set with expiration dates) or until the user deletes the cookie.

Persistent cookies help websites remember your information and settings when you visit them in the future. This result in faster and more convenient access since, for example, you don’t have to login again.

Besides authentication, other website features made possible by persistent cookies include: language selection, theme selection, menu preferences, internal site bookmarks or favorites, among many others. On your first visit, the website is presented in default mode. During your visit, you select your preferences and these preferences are remembered, through the use of the persistent cookie, the next time you visit the site.

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Beginners' Guide , PHP Programmer , Zend Certified Engineer , Magento Certified Developer