Java Questions

All Web Images Videos News

Domains Trends AI Directory

Settings

Appearance

Site Icons

Font Size

Font

General

Infinite Scroll

Open Links in a New Tab

Safe Search

https://java.com Java

Overview
Jobs
Questions
SEO
Security
Trends
Stack
Speed

Related Questions

What are the main features of Java? Answer: Java is known for its platform independence and its powerful development tools. Java is a platform-independent language, meaning that programs written in Java can run on any operating system, such as Windows, Mac OS, or Linux. It also has a built-in security feature, which makes it a safe language to use. Additionally, Java has a large library of APIs, which allow developers to create powerful applications quickly and easily. Furthermore, Java is a strongly typed language, which helps to prevent errors.

What is the Java Virtual Machine (JVM)? Answer: The Java Virtual Machine (JVM) is an abstract computing machine that enables a computer to run a Java program. The JVM is a virtual machine that resides in the computer memory and it is responsible for interpreting and executing the Java bytecode. The Java bytecode is the compiled version of the Java program. The JVM has its own instruction set, which is independent of the computer architecture. It also has its own memory management and garbage collection capabilities. The JVM also provides security and portability, as the same Java program can run on any platform that has a JVM.

What is the difference between Java and JavaScript? Answer: The two languages are quite different. Java is a general-purpose, compiled, object-oriented programming language. It is most commonly used for developing backend applications or applications that run on a Java Virtual Machine (JVM). JavaScript, on the other hand, is a scripting language that is used primarily for client-side scripting in web browsers. It is not compiled, and its syntax is loosely-typed. While Java is a programming language, JavaScript is a scripting language.

What is the difference between Java and C++? Answer: Java and C++ are both object-oriented programming languages. However, there are some key differences between them. Java is a platform-independent language, meaning that programs written in Java can run on any operating system, such as Windows, Mac OS, or Linux. C++, on the other hand, is a platform-dependent language and programs written in C++ must be compiled before they can run on a specific platform. Additionally, Java is a strongly-typed language, while C++ is a loosely-typed language. Furthermore, Java uses automatic garbage collection, while C++ does not.

What is Java? Answer: Java is a general-purpose computer programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible. It is intended to let application developers “write once, run anywhere” (WORA), meaning that code that runs on one platform does not need to be recompiled to run on another. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. Java is, as of 2019, one of the most popular programming languages in use according to GitHub, particularly for client-server web applications, with a reported 9 million developers.

What is the Java Runtime Environment (JRE)? Answer: The Java Runtime Environment (JRE) is a software package that provides the Java Virtual Machine (JVM), the Java Class Library, and other components necessary to run Java programs. The JRE is included in the Java Development Kit (JDK), which is a software development environment used for developing Java applications and applets. The JRE is responsible for interpreting and executing Java bytecode. It also includes a class loader, which is responsible for loading classes into the JVM.

What is the Java Development Kit (JDK)? Answer: 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. The JDK is freely available from Oracle and is used by developers to develop, test, and deploy Java applications. The JDK also includes libraries, sample code, and tutorials.

What are the advantages of Java? Answer: Java has many advantages. It is highly portable, meaning that applications written in Java can run on any platform that has a Java Virtual Machine (JVM). It is also very secure, with built-in security features that protect against malicious code and attacks. Additionally, Java is an interpreted language, which makes it easier to debug and develop applications quickly. Java also has a large library of APIs and a powerful development toolset, which makes it easy to create powerful applications.

What is an applet? Answer: An applet is a small Java program that can be embedded in a web page and run in a web browser. Applets are used to provide interactive content, such as games, calculators, and other interactive features. The applet is downloaded from the web server and run on the client's computer inside the web browser. Applets can also be used to provide secure online services, such as online banking and e-commerce.

What is the Java Native Interface (JNI)? Answer: The Java Native Interface (JNI) is a programming framework that enables Java code to call and to be called by native applications and libraries written in other languages, such as C and C++. The JNI allows developers to access system resources and libraries that are not available in the Java language. It also allows developers to write performance-critical code in a language other than Java, while still being able to use the Java language for the bulk of the application. The JNI is an integral part of the Java platform and is used extensively in the development of Java applications.