Answer: Java uses compiler as well as interpreter. This is because firstly Java source code is converted to byte code by Compiler and then the interpreter comes in use which converts byte code to further machine code like Unix,MS dos,Windows7 etc.
Why does Java use both compiler as well as interpreter?
Java compiler compiles Java source code to Bytecode. Bytecode cannot run on the processor directly as processor only understands Machine Code. Java Virtual Machine (JVM) takes this Bytecode as input and converts it into Machine Code line by line. So, JVM acts as an interpreter for converting Bytecode to Machine Code.
Why Java is compiler and interpreter?
Why do we say Java is compiled and interpreted language. Because source code ( . java files) is compiled into bytecode ( . class files) that is then interpreted by a Java Virtual Machine (also known as a JVM) for execution (the JVM can do further optimization but this is anoher story).
Why we need both compiler and interpreter?
To convert source code into machine code, we use either a compiler or an interpreter. Both compilers and interpreters are used to convert a program written in a high-level language into machine code understood by computers.
Does Java need both compiler and interpreter?
Java is first machine independent programming language; it uses both compiler and interpreter. Java compilers are designed in such a way that converts source code into platform independent form i-e byte codes. These byte codes are then converted to machine code by interpreter.
Does Java use only interpreter?
Java does both compilation and interpretation, In Java, programs are not compiled into executable files; they are compiled into bytecode (as discussed earlier), which the JVM (Java Virtual Machine) then interprets / executes at runtime. Java source code is compiled into bytecode when we use the javac compiler.
How does compiler and interpreter work?
The Compiler scans whole program first and then translates it into machine code which will be executed by the computer processor. The Interpreters translates one statement into machine language, executes it, and proceeds to next statement.
Why compiler is faster than interpreter?
A compiled program is faster to run than an interpreted program, but it takes more time to compile and run a program than to just interpret it. A compiler indeed produces faster programs. It happens fundamentally because it must analyze each statement just once, while an interpreter must analyze it each time.
Why is JVM an interpreter?
JVM have both compiler and interpreter. Because the compiler compiles the code and generates bytecode. After that the interpreter converts bytecode to machine understandable code.
Why does Java need a compiler?
When the program is to be run, the bytecode is converted, using the just-in-time (JIT) compiler. The result is machine code which is then fed to the memory and is executed. Java code needs to be compiled twice in order to be executed: Java programs need to be compiled to bytecode.
What are the advantages of compiler over interpreter?
Compilers can produce much more efficient object code than interpreters thus making the compiled programs to run faster. Interpreters however are easier to use, particularly for beginners, since errors are immediately displayed, corrected by the user, until the program is able to be executed.
How does interpreter work in Java?
Interpreter in Java is a computer program that converts high-level program statement into Assembly Level Language. It is designed to read the input source program and then translate the source program instruction by instruction.
What is the role of Java interpreter?
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.)