![]() What is your case?Ī) JDK: Do you have a folder called «jdk1.7…» (or higger)? In my case, I have 2 versions of JDK (1.6 and 1.7) and 2 versions of JRE (jre6 and jre7). Go to «Computer» and access to «C:\Program Files\Java», and check the folder that you have. 1.1. Check if you have Java JDK 1.7 or higger in Windows. – 1. How to install Java JDK and JRE in Windows. Check if you have Java JDK 1.7 or higger in Linux.How to install Java JDK and JRE in Linux:.Check if you have Java JDK 1.7 or higger in Windows.How to install Java JDK and JRE in Windows:.Here, I am going to write only about Java JDK. There are others JDKs (different to Java JDK): for example OpenJDK. So, the JDK is necessary for several things that I have proposed in this blog during some years, so that I have decided include an article more complete about it. It consists of a Java Virtual Machine and all of the class libraries present in the production environment, as well as additional libraries only useful to developers, such as the internationalization libraries and the IDL libraries (wikipedia reference). ![]() ![]() Too, the JDK also comes with a complete Java Runtime Environment, usually called a private runtime, due to the fact that it is separated from the «regular» JRE and has extra contents. The JDK has a collection of progamming tools, including java, javac, javadoc, javaws, jar, apt, appletviewer, visualVM, etc.
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