Is Java guaranteed to be write once run anywhere?

Why Java is considered as write once run everywhere?

The “Write Once, Run Everywhere” slogan refers to the fact that an application written is Java can be run on any hardware which has the Java Virtual Machine (JVM), and that the JVM is now licensed to hundreds of operating systems vendors systems including Microsoft for Windows.

What makes it possible for Java to implement the principle of write once run everywhere?

Well, it translates your code into Machine code which the Operating System could understand. Therefore JVM is platform dependent since every OS has a different Machine code. So, basically you write a Java Program only once and can be used/run everywhere.

Is Java architecturally neutral if yes why?


Java is architecture neutral because there are no implementation dependent features, for example, the size of primitive types is fixed. In C programming, int data type occupies 2 bytes of memory for 32-bit architecture and 4 bytes of memory for 64-bit architecture.

Why bytecode is called bytecode?

The name bytecode stems from instruction sets that have one-byte opcodes followed by optional parameters.

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How is it possible that Java programs are able to run in different platform?

In the case of Java, it is the magic of Bytecode that makes it platform independent. This adds to an important feature in the JAVA language termed as portability. … Different JVM is designed for different OS and byte code is able to run on different OS.

Which is better C++ or Java or Python?

C++ being a fast and compiled programming language has gained popularity and is the first programming language that a programmer learns.

C++ vs Java vs Python?

Code length is a bit lesser, 1.5 times less that java. Java has quite huge code. Smaller code length, 3-4 times less than java.

Should I learn C++ or Java?

Whereas Java is an easy language to learn and write in, which reduces development time, C++ produces the leanest and most effective code for high-impact applications. … Programs written in C++ tend to use computer resources more efficiently than those written in Java or other languages.

Why pointers are not used in Java?

So overall Java doesn’t have pointers (in the C/C++ sense) because it doesn’t need them for general purpose OOP programming. Furthermore, adding pointers to Java would undermine security and robustness and make the language more complex.

What are the two major types of programming language?

There are two types of programming languages, which can be categorized into the following ways:

  1. High level language.
  2. Low level language. …
  3. High level language. a) Procedural-Oriented language (3GL) …
  4. Low level language. a) Machine language (1GL) …
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Which file is human readable in Java?

Question 1: When you compile a program written in the Java programming language, the compiler converts the human-readable source file into platform-independent code that a Java Virtual Machine can understand. What is this platform-independent code called? Answer 1: Bytecode.