Learning Android™ Application Programming: A Hands-On Guide to Building Android Applications
by James Talbot, Justin McLean, Jorge Hernandez
Understanding Java Versions
In Figure 2.2 you will notice the naming convention used for the JDK: jdk1.7.0_40. The reason for this is historical: From the beginning of Java, the JDK used this notation—Jdk1.0, 1.1, 1.2, etc. The JRE uses the version number alone: jre7.
The product you installed was shown on the Oracle website as Java SE 7u40, which means Java Standard Edition version 7, update 40. The JDK installation directory still uses the old convention, but the product name used on the web and documentation is simply Java 7.
The JRE you installed is called a public JRE because it gets installed in the Windows Registry and can be used by other Java applications. You will occasionally be prompted to update it. If you do, the JRE version will ...
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