JDK Tools
JDK (Java
Development Kit) provides a collection of tools and utilities that assist
developers in building, testing, and running Java programs. These tools are
typically grouped into development, diagnostic, monitoring, and deployment
tools. Below is a brief overview of some key JDK tools:
Development
Tools
·
javac:
The Java Compiler - Converts Java source code (.java) into bytecode (.class).
·
java:
The Java Launcher - Executes Java applications by launching the Java Virtual
Machine (JVM).
·
javadoc:
Generates HTML documentation from Java source code comments.
·
jar:
Java Archive Tool - Packages multiple files into a .jar archive.
·
jdb:
Java Debugger - A command-line tool for debugging Java applications.
·
javap:
The Java Class File Disassembler - Provides details about compiled class files.
JIT in Java
When we
write a program in any programming language it requires converting that code in
the machine-understandable form because the machine only understands the binary
language. According to the programming languages, compiler differs. The
compiler is a program that converts the high-level language to machine level
code. The Java programming language uses the compiler named javac. It converts
the high-level language code into machine code (bytecode). JIT is a part of the
JVM that optimizes the performance of the application. JIT stands for
Java-In-Time Compiler. The JIT compilation is also known as dynamic
compilation. In this section, we will learn what is JIT in Java, its working,
and the phases of the JIT compiler.
What is JIT in Java?
JIT in Java
is an integral part of the JVM. It accelerates execution performance many times
over the previous level. In other words, it is a long-running,
computer-intensive program that provides the best performance environment. It
optimizes the performance of the Java application at compile or run time.
JIT
compiler boosts the performance of the native application. We can understand
the working of the JIT compiler with the help of the following flow chart.
