Bytecode is the intermediate representation of a Java program, allowing a JVM to translate a program into machine-level assembly instructions. When a Java program is compiled, bytecode is generated in the form of a . class file.
What is the use of bytecode?
Bytecode is program code that has been compiled from source code into low-level code designed for a software interpreter. It may be executed by a virtual machine (such as a JVM) or further compiled into machine code, which is recognized by the processor.
What do you understand by bytecode in Java?
Java bytecode is the result of the compilation of a Java program, an intermediate representation of that program which is machine independent. The Java bytecode gets processed by the Java virtual machine (JVM) instead of the processor.
What is the role of bytecode in making Java platform independent?
In Java, programs are compiled into byte code and that byte code is platform-independent. The byte code is executed by the Java Virtual Machine and the Java Virtual Machine is platform dependent. Java is platform-independent. Any machine to execute the byte code needs the Java Virtual Machine.
Is used to execute Java bytecode?
A Java interpreter is used to run the compiled Java bytecode program. (Each type of computer needs its own Java bytecode interpreter, but all these interpreters interpret the same bytecode language.)
What is bytecode answer?
Bytecode is computer object code that is processed by a program, usually referred to as a virtual machine, rather than by the “real” computer machine, the hardware processor. … Bytecode is the result of compiling source code written in a language that supports this approach.
Is bytecode and machine code same?
Byte code is a non-runnable code generated after compilation of source code and it relies on an interpreter to get executed. Machine code is a set of instructions in machine language or in binary format and it is directly executed by CPU.
What is Polymorphism in Java?
Polymorphism in Java is the ability of an object to take many forms. To simply put, polymorphism in java allows us to perform the same action in many different ways. … There are two types of polymorphism in java: compile-time polymorphism and runtime polymorphism.
What is JVM and its use?
A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes what is required in a JVM implementation.
What is JDK and why it is used?
The Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (Java), a compiler (javac), an archiver (jar), a documentation generator (Javadoc) and other tools needed in Java development.
Is JVM independent of OS?
The JVM is not platform independent. Java Virtual Machine (JVM) provides the environment to execute the java file(. Class file). So at the end it’s depends on your kernel , and kernel is differ from OS (Operating System) to OS.
Why Java is a platform?
JAVA is platform independent because it having its own JVM so that it can run on any platform . java is platform independent , which means once written you can run it anywhere. The platform is a hardware or software used to run an application.
Who is the father of Java language?
Why bytecode is called bytecode?
Bytecode, also termed portable code or p-code, is a form of instruction set designed for efficient execution by a software interpreter.
Who generates bytecode in Java?
JVM executes the byte code generated by compiler and produce output. JVM is the one that makes java platform independent. So to summarise everything: The Java Virtual machine (JVM) is the virtual machine that runs on actual machine (your computer) and executes Java byte code.
What is the execution process of Java?
In Java, programs are not compiled into executable files; they are compiled into bytecode (as discussed earlier), which the JVM (Java Virtual Machine) then executes at runtime. Java source code is compiled into bytecode when we use the javac compiler. The bytecode gets saved on the disk with the file extension .