j2ee
They are all programming languages.
explain various categories of computing environment
Computing Environment is a collection of computers / machines, software, and networks that support the processing and exchange of electronic information meant to support various types of computing solutions.
The general Java Runtime Environment allows a computer to run Java applets and compiled Java files.
Yes you can but for that you must have have a Java Runtime Environment installed in your computer. Also if you are talking about programming in java then you need to install a Java SDK which can help you in executing your java code and run it. (It also contains Java Runtime Environment).
Java Integrated Development Environment (IDE) provides an environment to Edit, compile and debug and generate java codeThere are several java IDE like Eclipse, WSAD, BlueJ, JCreator etc
The environment is not changing petroleum.
The java runtime environment can be downloaded from several websites. Among them are Oracle, Java, CNET, Softsonic, Eclipse, AfterDawn, Soft32, and OldApps.
Computing Environment is a collection of computers / machines, software, and networks that support the processing and exchange of electronic information meant to support various types of computing solutions.
The Java Runtime Environment invokes main methods.
JavaScript and java are 2 completely different things. JavaScript is in web pages to make it more interesting and java is a complex computing language devised from c + c++.