Java and Javaee are defined and used, components and functions, platforms and environments, application scope and development models, etc. Detailed introduction: 1. Definition and purpose, Java is an object-oriented programming language, launched by Sun Microsystems in 1995. Java has the characteristics of cross-platform, portability, security and simplicity, and is widely used to develop various Applications, and Java EE is an enterprise-level extension of the Java platform, designed to develop and deploy large-scale, scalable, reliable enterprise-level applications, etc.
Java and Java EE (Java Enterprise Edition) are two different concepts of the Java platform. Java is a programming language, while Java EE is an extension of the Java platform for developing enterprise-level applications. The difference between Java and Java EE will be introduced in detail below:
1. Definition and purpose:
- Java: Java is an object-oriented programming language developed by Sun Microsystems (now Oracle Corporation ) was launched in 1995. Java has the characteristics of cross-platform, portability, security and simplicity, and is widely used to develop various applications, including desktop applications, mobile applications, embedded systems and server-side applications.
- Java EE: Java EE is an enterprise-level extension of the Java platform, designed to develop and deploy large-scale, scalable, and reliable enterprise-level applications. Java EE provides a series of APIs and specifications for developing distributed applications, web applications, enterprise-level services, messaging, etc.
2. Components and functions:
- Java: Java provides a series of core class libraries and APIs for developing various types of applications. It includes basic language features, collection framework, input and output, network, multi-threading, graphical user interface and other functions.
- Java EE: Java EE provides a series of extended components and functions based on Java for developing enterprise-level applications. It includes Servlet, JSP, EJB, JPA, JMS, JTA and other components and technologies, and is used to process Web requests, persistent data, transaction management, message passing, etc.
3. Platform and environment:
- Java: Java can run on various operating systems and hardware platforms, including Windows, Linux, Mac, etc. Developing Java applications requires installing the Java Development Kit (JDK).
- Java EE: Java EE is built on the Java platform, and a Java EE application server needs to be installed on the basis of Java, such as Apache Tomcat, JBoss, WebLogic, etc. Java EE applications are deployed and run on Java EE application servers.
4. Application scope:
- Java: Java is widely used in various fields, including desktop applications, mobile applications, game development, embedded systems, etc. Java has good portability and cross-platform features, making it a general-purpose programming language.
- Java EE: Java EE is mainly used to develop and deploy large-scale enterprise-level applications. It provides a series of enterprise-level components and functions to handle enterprise-level requirements such as distributed transactions, high concurrent access, security, and reliability.
5. Development mode:
- Java: Java can be developed using various integrated development environments (IDEs), such as Eclipse, IntelliJ IDEA, NetBeans, etc. Developing Java applications usually follows the object-oriented programming pattern.
- Java EE: Java EE development usually requires the use of specific development tools and frameworks, such as JavaServer Faces (JSF), Spring, Hibernate, etc. Java EE applications typically follow a development model of layered architecture and modular design.
To summarize, Java is a programming language used to develop various types of applications. Java EE is an extension of the Java platform for developing and deploying large-scale, scalable, and reliable enterprise-level applications. Java provides basic language features and class libraries, while Java EE provides a series of enterprise-level components and functions based on Java. Java can run on various operating systems and hardware platforms, and Java EE requires the installation of a Java EE application server based on Java. Java is widely used in various fields, while Java EE is mainly used to develop large-scale enterprise-level applications. Various integrated development environments can be used to develop Java applications, while Java EE development usually requires the use of specific development tools and frameworks.
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