【Java 和 C++的异同
如今 Java 和 C++ 编程语言在竞争性编码中大量使用。由于一些令人敬畏的特性，这两种编程语言也主要用于工业。C++因其高效、高速和动态内存利用率而在程序员中广泛流行。Java 在 IT 行业应用广泛，在软件开发方面是其他任何编程语言无法比拟的。 让我们通过不同的点来比较这些流行的编码语言:
Java 和 C++的相似之处
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Execution: At compile-time, Java source code or .java file is converted into a bytecode or .class file. At runtime, JVM(Java Virtual Machine) will load the .class file and will convert it to machine code with the help of an interpreter. After compilation of method calls(using Just-In-Time (JIT) compiler), JVM will execute the optimized code. So Java is both compiled as well as an interpreted language.
另一方面，C++只使用编译器来执行代码。C++编译器将源代码编译并转换成机器代码。这就是为什么 c++比 Java 快，但不依赖于平台。
下面是如何执行 Java 和 C++代码的图示:
执行一个 Java 代码
- 执行 C++代码
2。特性: C++和 Java 都有几个面向对象编程特性，提供了许多有用的编程功能。有些功能受一个支持，有些不受支持。 下表显示了两种编程语言支持和不支持的特性:
是T68】动态绑定 T72】是T75T78 | trait | c++ | Java 语言(一种计算机语言，尤用于创建网站) | | --- | --- | --- | | abstract | | be | | encapsulation | be | be | | Polymorphism | be | be | | Static binding | be | be | | be | | Operator overload | | Template class | be | no | | Interference and packet | no | be | | 应用程序接口 | no | be |- 应用:c++和 Java 都有广阔的应用领域。以下是两种语言的应用:
- c++编程语言的应用 :
- 适合开发大型软件(如乘客预订系统)。
- MySQL 是用 C++编写的。
- 为了快速执行，C++主要用于游戏开发。
- 谷歌 Chromium 浏览器、文件系统、集群数据处理都是用 C++编写的。
- Adobe Premiere、Photoshop 和 Illustrator 这些用 C++编写脚本的流行应用程序。
- 高级计算和图形-实时物理模拟，高性能图像处理。
- C++也用于许多先进的医疗设备，如核磁共振等。
- Java 编程语言的应用 :
- 桌面图形用户界面应用程序开发。
- 安卓和移动应用开发。
- Java 的应用是在嵌入式技术中，如 SIM 卡、磁盘播放器、电视等。
- Java EE(企业版)为运行大型企业软件提供了一个 API 和运行时环境。
- 网络应用和网络服务，如互联网连接、网络应用开发。
- c++编程语言的应用 :
- 环境: C++是平台相关的，而 Java 是平台无关的编程语言。我们必须在同一个平台上编写和运行 C++代码。Java 有 WORA(写一次，到处跑)特性，通过这个特性，我们可以在一个平台上写一次代码，我们可以在任何地方运行代码。
Java 与 C++的区别:
| parameter | Java 语言(一种计算机语言，尤用于创建网站) | c++ | | --- | --- | --- | | founder | Java was developed by james gosling in Sun Microsystems. | C++ was developed by bjarne stroustrup in Bell Laboratories in 1979 as an extension of C language. | | First release | May 23(rd), 1995 | October, 1985 | | Stable release | Java SE 14 or JDK 14 was released on March 17th, 2020. | C++17 was released in December 2017. | | official website | oracle.com/java | isocpp.org | | Suffer from: | Java has been influenced by Ada 83, Pascal, C++, [C #](https://www.geeksforgeeks.org/csharp-programming-language/) and other languages. | C++)你好爱达 ada、algol 乌乎乎乎。 | | Affected by: | Java 语言(一种计算机语言，尤用于创建网站)受影响开发了 BeanShell、C#、Clojure、Groovy、Hack、J#、Kotlin、PHP、Python、Scala 等语言。 | C++)嗨嗨嗨嗨 c99 Java js++、月亮 perl PHP python rust seed 7(英文)。 | | Platform dependence | Platform independent, Java bytecode can work on any operating system. | Platform dependencies should be compiled for different platforms. | | transportability | It can run in any operating system, so it is portable. | C++ is platform-dependent, so it is not portable. | | compile | Java is both a compilation language and an interpretation language. | C++ has only compilation language. | | memory management | Memory management is controlled by the system. | Memory management in c++ is manual. | | Virtual keyword | It has no virtual keywords. | There are virtual keywords. | | Multiple inheritance | It only supports single inheritance. Multiple inheritance parts are implemented using interfaces. | Support single inheritance and multiple inheritance. | | heavy-loaded | Only method overloading is supported, but operator overloading is not allowed. | Method and operator overloading is supported. | | needle | It supports limited support for pointers. | Strongly supports pointers. | | warehouse | It does not support direct native library call, only Java native interface. | Support direct system library call, suitable for system level programming. | | warehouse | There are a wide range of classes in the library for various advanced services. | C++ library is a relatively low-level function. | | Document notes | Support document comments (for example,/* *) ... */) to obtain source code. | Document comments of source code are not supported. | | Thread support | Java supports documentation comments (for example,/* *) .. */as source code. | C++ has no built-in support for threads and relies on third-party thread libraries. | | type | Java is the only object-oriented programming language. | C++ is a procedural and object-oriented programming language. | | Input-output mechanism | Java uses [system class] **system.in** for input and **system.out** for output. | C++ uses **CIN** for input and **cout** for output. | | Goto keyword | Goto keyword is not supported in Java | C++ supports goto keyword. | | Structure and union | Java does not support structure and union. | C++ supports structure and federation. | | parameter passing | Java only supports the technology of passing by value. | C++ supports passing by value and passing by reference. | | Global scope | Global scope is not supported. | Supports global scope and namespace scope. | | Object management | Automatic object management with garbage collection. | Support manual object management by creating and deleting. |版权属于：月萌API www.moonapi.com，转载请注明出处
