JAVA ARCHITECTURES PPT | "Mastering Java: A Comprehensive Guide to Core Concepts, Object-Oriented Programming, Advanced Features, and Real-World Applications in Just One Presentation"

Nov 25, 20240 likes16 views

The document outlines Java architecture, detailing its components including JVM, JRE, and JDK, which collectively facilitate the interpretation and compilation of Java programs. It describes the functions of the JVM, such as loading class files, executing byte code, and managing memory, with specifics about its architecture like the execution engine, interpreter, and garbage collector. Additionally, it explains the role of the JDK in application development and the execution environment provided by the JRE.

JAVAARCHITECTURE
 Java Architecture is a collection of components, i.e.,
 JVM
 JRE
 JDK
 It integrates the process of interpretation and compilation. It defines all the processes
involved in creating a Java program.
 Java Architecture explains each and every step of how a program is compiled and
executed.

JAVA DEVELOPMENT KIT (JDK)
 It is a software development environment used in the development of Java applications
and applets.
 Java Development Kit holds JRE, a compiler, an interpreter or loader, and several
development tools in it.

JAVA VIRTUAL MACHINE(JVM)
 The main feature of Java is WORA. WORA stands for Write Once Run Anywhere.
 The feature states that we can write our code once and use it anywhere or on any
operating system.
 Our Java program can run any of the platforms only because of the Java Virtual
Machine.
 It is a Java platform component that gives us an environment to execute java programs.
 JVM's main task is to convert byte code into machine code.

 Class Loader: Class Loader is a subsystem used to load class files. Class Loader first
loads the Java code whenever we run it.
 Class Method Area: In the memory, there is an area where the class data is stored
during the code's execution. Class method area holds the information of static variables,
static methods, static blocks, and instance methods.
 Heap: The heap area is a part of the JVM memory and is created when the JVM starts
up. Its size cannot be static because it increase or decrease during the application runs.
 Stack: It is also referred to as thread stack. It is created for a single execution thread.
The thread uses this area to store the elements like the partial result, local variable, data
used for calling method and returns etc.

 Native Stack: It contains the information of all the native methods used in our
application.
 Execution Engine: It is the central part of the JVM. Its main task is to execute the byte
code and execute the Java classes. The execution engine has three main components
used for executing Java classes.
 Interpreter: It converts the byte code into native code and executes. It sequentially
executes the code. The interpreter interprets continuously and even the same method
multiple times.
 JIT Compiler: JIT compiler is introduced to remove the drawback of the interpreter. It
increases the speed of execution and improves performance.

 Garbage Collector : The garbage collector is used to manage the memory, and it is a
program written in Java. It works in two phases, i.e., Mark and Sweep.
 Java Native Interface : Java Native Interface works as a mediator between Java
method calls and native libraries.

JAVA RUNTIME ENVIRONMENT(JRE)
 It provides an environment in which Java programs are executed.
 JRE takes our Java code, integrates it with the required libraries, and then starts the
JVM to execute it.

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JAVA ARCHITECTURES PPT | "Mastering Java: A Comprehensive Guide to Core Concepts, Object-Oriented Programming, Advanced Features, and Real-World Applications in Just One Presentation"

1. JAVA ARCHITECTURE BY: VISHNU PRASATH R

2. JAVAARCHITECTURE  Java Architecture is a collection of components, i.e.,  JVM  JRE  JDK  It integrates the process of interpretation and compilation. It defines all the processes involved in creating a Java program.  Java Architecture explains each and every step of how a program is compiled and executed.

3. COMPONENTS OF ARCHITECTURE

4. JAVA DEVELOPMENT KIT (JDK)  It is a software development environment used in the development of Java applications and applets.  Java Development Kit holds JRE, a compiler, an interpreter or loader, and several development tools in it.

5. JAVA VIRTUAL MACHINE(JVM)  The main feature of Java is WORA. WORA stands for Write Once Run Anywhere.  The feature states that we can write our code once and use it anywhere or on any operating system.  Our Java program can run any of the platforms only because of the Java Virtual Machine.  It is a Java platform component that gives us an environment to execute java programs.  JVM's main task is to convert byte code into machine code.

6. JVM ARCHITECTURE

7.  Class Loader: Class Loader is a subsystem used to load class files. Class Loader first loads the Java code whenever we run it.  Class Method Area: In the memory, there is an area where the class data is stored during the code's execution. Class method area holds the information of static variables, static methods, static blocks, and instance methods.  Heap: The heap area is a part of the JVM memory and is created when the JVM starts up. Its size cannot be static because it increase or decrease during the application runs.  Stack: It is also referred to as thread stack. It is created for a single execution thread. The thread uses this area to store the elements like the partial result, local variable, data used for calling method and returns etc.

8.  Native Stack: It contains the information of all the native methods used in our application.  Execution Engine: It is the central part of the JVM. Its main task is to execute the byte code and execute the Java classes. The execution engine has three main components used for executing Java classes.  Interpreter: It converts the byte code into native code and executes. It sequentially executes the code. The interpreter interprets continuously and even the same method multiple times.  JIT Compiler: JIT compiler is introduced to remove the drawback of the interpreter. It increases the speed of execution and improves performance.

9.  Garbage Collector : The garbage collector is used to manage the memory, and it is a program written in Java. It works in two phases, i.e., Mark and Sweep.  Java Native Interface : Java Native Interface works as a mediator between Java method calls and native libraries.

10. JAVA RUNTIME ENVIRONMENT(JRE)  It provides an environment in which Java programs are executed.  JRE takes our Java code, integrates it with the required libraries, and then starts the JVM to execute it.

11. THANK YOU

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