NTA-NET (UGC-NET) Computer Science & Applications (87) Programming Languages-Java Study Material (Page 2 of 5)

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Java: Java Compilation, Java Virtual Machine or JVM, Java Runtime Environment or JRE

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Java Compilation

Next, before we move onto the compilation of the Java program, let us cover some distinctions between the well-known terms associated with Java,

Java Virtual Machine or JVM

It is an abstract machine. It is called a virtual machine because it does not physically exist. It is a specification that provide…

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Java: Compilation, Execution, Just-In-Time Compiler, Just-In-Time Compiler

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Next, let us now see how the source code in Java is compiled, although we have already seen some glimpses of this during the “System Software” topic.

Compilation and Execution of a Java Program

As far as our engineering semesters are concerned, this tends to be a regular question. In the case of the competitive exams like NET, GATE etc. this appears as more like a “fill in the blank” type of question.

  • Unlike the usual case, the Java programs are not compiled into executable files; they are in fact compiled into bytecode which the JVM (Java Virtual Mach…

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