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Setting up the development (b) Java Archive tool (jar): This tool
environment (IDE and JDK packages your compiled class files
installation) (bytecode) and additional resources
into a single archive file (JAR file)
When you need to write Java programs, for easier distribution. Chapter Five: Object oriented programming with Java
it is important to make sure Java Runtime (c) Java debugger (jdb): This tool helps
FOR ONLINE READING ONLY
Environment (JRE), Java Virtual you identify and fix errors (bugs) in
Machine (JVM) and Java Development your code during development.
Kit (JDK) are already installed in your (d) Documentation: This tool provides
computer. extensive documentation on the Java
language, APIs, and libraries.
The Java Runtime Environment (JRE)
is a collection of software tools used to Java Runtime Environment (JRE): The
develop Java applications. It includes JRE is a software package that provides
supporting libraries, platform core the necessary runtime environment
classes, and the Java Virtual Machine for executing Java applications. It
(JVM). While JRE is available for includes the JVM, which is responsible
standalone download, it is a component for executing Java bytecode. The JRE
of the Java Development Kit (JDK). also contains Java class libraries and
other components required to run Java
Java Development Kit (JDK): The programs. If you only need to run
JDK is a software development kit that Java programs and not develop them,
provides the necessary tools, libraries, installing the JRE is sufficient.
and documentation for developing
Java applications. It includes the Java Java Virtual Machine (JVM): The JVM
compiler, which converts Java source is the runtime engine that executes
Java bytecode. It is responsible for
code into bytecode that can be executed loading, verifying, and executing Java
by the JVM. programs. The JVM converts bytecode

into machine-specific code, allowing
The JDK also includes other development Java programs to run on different
tools like debuggers, profilers, and platforms without modification. It
application servers. It is essential for also provides memory management,
writing, compiling, and packaging Java garbage collection, and other runtime
programs. Some components of JDK services. Therefore, in short, JDK is
includes: used to develop and compile Java OOP
programs. JRE is used to run compiled
(a) Java compiler (javac): This converts Java OOP programs (bytecode) on any
your human-readable Java code platform installed with a JRE. JVM
(source code) into bytecode, a is used to interpret and execute the
machine-independent intermediate bytecode instructions in Java OOP
representation. program.

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Student’s Book Form Five

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