ios is not java.
iOS is a mobile operating system developed by Apple. Apple first announced this system at the Macworld conference on January 9, 2007. It was originally designed for use with the iPhone, and was later applied to iPod touch, iPad, Apple TV and other products. iOS, like Apple's macOS operating system, is a Unix-like commercial operating system.
The iOS system is developed using the Obj-C language. The Obj-C language is a high-level programming language that is based on the C language and expanded with object-oriented features. If you want to learn iOS in depth, you need to have a good foundation in C language.
Java is an object-oriented programming language and a widely used computer programming language. It has the characteristics of cross-platform, object-oriented, and generic programming, and is widely used in enterprise-level Web App development and mobile app development.
Java not only absorbs the various advantages of the C language, but also abandons the concepts such as multiple inheritance and pointers that are difficult to understand in C. Therefore, the Java language has two characteristics: powerful functions and simple and easy to use. As a representative of static object-oriented programming languages, Java language perfectly implements object-oriented theory and allows programmers to perform complex programming with an elegant way of thinking.
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