A dynamic IP address is a temporary address that is assigned each time a computer or device accesses the Internet. The four numbers in an IP address are used in different ways to identify a particular network and a host on that network.ou can also use Google search to find your IP address. Type  what is my IP address as a search query and Google will show the IP address of the computer from which the query was received as the top search result.
1 Click the Environment Variables button. 2  Under System Variables, click New. 3  Enter the variable name as JAVA_HOME. 4  Enter the variable value (one of the paths mentioned above) as the installation path for the Java Development Kit. 5  Click OK. 6  Click Apply Changes.
One of the main advantage of using JAVA_HOME variable to point Java installation directory is that : 1) It's easy to upgrade JDK without affecting your application startup and config file which points to JAVA_HOME. you just need to download new version and make sure your JAVA_HOME points to new version of Java.