A set of software tools required for compiling and execution of a Java application on a computer creates Java environment. Java Runtime Environment (JRE) combines with JVM and other required libraries. To run Java applications, Java Development Kit needs to be installed. JRE is part of Java Development Kit (JDK). To make your computer ready for Java environment, follow the instructions in the section below.
vFor basic programs, you can use Notepad or Notepad++ as the code editor, compile code using ‘javac Program.class’ and run it using command ‘java Program’ using the command prompt. But for bigger applications, it comes difficult to handle application during development. To handle bigger programs, IDE can be used. An IDE is a software that provides facilities & tools to the programmers to program an application easily.
For Java, NetBeans & Eclipse are mostly used IDEs. You can practice any of them as the code editor.
At the end of this chapter, you have an idea of what is JVM, how JVM works, what is JDK, what is JRE, what is IDE and how-to setup environment for Java. Your system is ready for Java application development. In next chapter, we will develop the understanding of some basic concepts and make our first program to print “Hello World” and proceed towards deeper techniques and details of Java.
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