What is Java Used For? A Look at the Most Important Applications

什么是爪哇？

Java is a high-level, open-source programming language owned by Sun Microsystems that has risen in popularity since its 1995 debut. It has evolved a lot and is being used in a wide range of applications. As perTIOBE索引，Java仍然是软件开发人员中全球第三大流行的语言。

Java是用什么？

Java works in an extensive array of applications, ranging from GUI-based desktop applications to web-based dynamic applications. Let’s take a deeper look atJava用于什么。

基于gui桌面应用程序

Java提供诸如Javafx和Swing之类的库，可以构建基于Java的动态桌面应用程序。直到过去几年才使用秋千。然后，Java介绍了Javafx，它比摆动更先进。

JavaFX offers a great UI kit and features to add media, UI control, and more in your Java application. It uses FXML, which is HTML-like and can define application interfaces. It also has features like “Scene builder.” which can integrate with NetBeans or Eclipse. Scene builder can create the FXML document using the drag-and-drop method. IDEs like NetBeans, Eclipse, and Intellij IDEA are built using Java.

要开始构建基于台式机的应用程序，您应该对core Java concepts。

基于Web的动态应用程序

HTML和CSS等技术用于设计网页。这些网页在网络浏览器上工作。但是，我们需要一种可以处理服务器相关任务的服务器端技术。这是服务器端脚本（如Servlets和Spring）进入图片的地方。

Java提供了Servlet，Struts，Spring，Hibernate和JSP等功能。这些可以帮助构建在浏览器中运行的基于Web的动态应用程序。春季和春季靴等框架简化了开发人员的生活。他们通过减少开发人员的努力来提供更快的方法来制作Web应用程序。

Java also offers templating engines like Thymeleaf. This is an open-source library that is useful for writing server-side Java templates. These templates can access Java objects and generate HTML on the fly for rendering on the browser.

Large banks like Goldman Sachs, Citi Group, Standard Chartered, and Barclays use Java. They have many back-end and front-end trading systems, data processing modules, settlement, and confirmation systems written in Java.

Mobile application

Android, the world’s most popular mobile-based operating system, is also developed using Java. Android applications are mostly written in Java using Android SDK, which is also Java-based. They consume Android APIs on devices developed in Java.

As of May 2021, Android had over 3 billion active devices around the world.

Spotify，Twitter和Opera Mini浏览器等应用都是使用Java作为平台构建的流行的Android应用程序。

尽管Android和iOS是世界上最受欢迎的基于移动设备的操作系统，但诺基亚和三星的低端手机仍然是基于Java的平台J2ME。在这些平台上运行的应用程序也使用Java构建。WhatsApp是世界上最受欢迎的应用程序，也可以在J2ME平台上为用户提供。用户可以与亲人安装和聊天。

后端网络和应用程序服务器

Java has many back-end web servers that are quite popular, like Apache Tomcat. Java also has application servers like JBoss, WebLogic, and WebSphere that are quite popular in the industry.

Software tools

IDEs like Eclipse, NetBeans, and IntelliJ Idea are desktop applications written using Java. Many developers use these IDEs to build software applications. These IDEs have Amazing interface, which is good enough to prove the capabilities of Java features like JavaFX and Swing.

Enterprise applications

Java是一种流行的编程语言。这很容易学习，并且通常是构建企业应用程序时的首选。它还具有在Java上运行的企业计算机的主要份额。

Java也有大量图书馆的选择。这些协助开发人员解决了构建应用程序时可能发生的最常见问题。对于企业来说，最好有选择，因为这将帮助他们在价格方面获得更好的交易。这些库中的许多可作为免费或开源。

Java提供Java Enterprise Edition（Java EE），它具有适合大型企业应用程序的运行企业软件的功能。大型公司使用的主要ERP系统和CRM系统是使用Java构建的。

Popular Java frameworks

What is a framework? Frameworks are tools that make developers’ lives easy by reducing a lot of boilerplate code. The following are some of the most popular Java-based frameworks used by Java developers.

• Spring framework.Spring Framework is a Java-based web framework designed to develop web applications using Java.
• Play framework.这是一个开源Java框架。它遵循模型视图控制器（MVC）模式。播放可帮助您构建可扩展的Web应用程序。
• 支柱。Struts is an open-source, Java-based web framework for developing web applications.
• Hibernate.Hibernate is a Java-based framework that enables you as a developer to map Java objects to relational databases.
• Grails framework.Grails是一个开源Web应用程序框架。它遵循“按惯例编码”范式，并提供独立的环境。它还隐藏了开发人员的大量配置。

这是Java的工作方式：

1. Java programs are written in .java files, which are then given to the compiler, which converts the same to machine-level code or bytecode.
2. 此字节码被保存为.class文件。
3. This Java file passes on to the JVM, which is responsible for executing this file. JVM is an interpreter that executes Java bytecode.
4. JVM加载.class文件并执行该文件以显示输出。

您可以通过Java projectsfor beginners.

What makes Java a favorite choice?

Why would you use Java rather than languages likeC++or Kotlin? There are some advantages to Java that others don’t share:

• Java是便携式的。Portability means you can write code on one platform and run it on different platforms.
• Java提供了Servlet，Struts，Spring，Hibernate和JSP等功能。Using these technologies, Java developers can build dynamic web applications.
• Java has features like JavaFX and Swing.这些可以构建具有高级功能的广泛桌面应用程序。
• Java提供了流行的框架，例如Spring，Struts和JSF。这些框架可以加快开发过程并为开发人员节省时间。betwayapp下载安装

我应该如何从Java开始我的编程职业？

你可以开始了学习核心Javaand start your programming career by practicing and writing some Java code. Building small projects will help you get started and boost your confidence. Reading a fewJava代码示例would be a good place to start.

Once you are comfortable writing Java programs and doing small projects,获得Java认证将是一个明显的下一步。Certification would add credibility to your profile and help you get a job quicker.