Kotlin Stdlib Commod technical principles are integrated with Java class libraries

Kotlin Stdlib Commod introduction: Kotlin is an emerging programming language that is gradually recognized and accepted by developers.It aims to solve some problems existing in the Java language and provide some additional functions and characteristics.Kotlin Stdlib Common (hereinafter referred to as KSC) is a module in the standard library of Kotlin, which allows developers to seamlessly integrate between KOTLIN and Java and use the function of the Java library.This article will briefly introduce the technical principles of KSC and how to integrate with the Java class library, and provide some Java code examples. Technical principle of Kotlin Stdlib Common: KSC makes full use of Kotlin's language characteristics and some tools in the standard library to support the integration with the Java class library.Specifically, it uses the following mechanisms: 1. Kotlin and Java interoperability: Kotlin can directly call the class, methods and fields in the Java class library without any special treatment.This allows developers to use various functions provided by the Java library in the Kotlin code. 2. Kotlin's extension function: Kotlin allows developers to add new functions to the existing Java class to provide richer features.By extending functions, we can add some unique Kotlin functions to the Java library to make it easier to use and more in line with Kotlin's programming style. 3. Kotlin type inference and air safety characteristics: Kotlin has a stricter type inspection mechanism, which can capture more types of related errors during compilation.In addition, Kotlin also introduces air safety characteristics to avoid air pointer abnormalities.These features make Kotlin and Java libraries more secure and reliable. How to integrate KSC and Java libraries: Kotlin Stdlib Common provides a variety of ways to support the seamless integration of Kotlin and Java libraries.Here are some commonly used methods and sample code: 1. Use the Java class library directly: Kotlin can directly use the class, methods and fields in the Java class library without any special treatment.The following is an example code that uses the math class in the Java library: kotlin val result = Math.max(5, 10) Println (result) // Output: 10 2. Use the extension function to enhance the Java class library: Kotlin's extension function mechanism allows us to add new functions to the Java class library to provide richer features.The following is an example code that adds an extended function to the String class of Java: kotlin fun String.isEmail(): Boolean { return this.contains("@") } val email = "abc@example.com" Println (email.isemail ()) // Output: true 3. Use Java and KOTLIN collection interoperability: The collection type in KOTLIN and the collection type in Java are interoperable, which can easily convert between two languages.Here are a sample code that concentrates between Kotlin and Java: kotlin // Kotlin collection converted to Java collection val kotlinList = listOf(1, 2, 3) val javaList: java.util.List<Int> = kotlinList.toJavaList() // java collection convert to Kotlin collection val javaList = java.util.ArrayList<Int>() javaList.add(1) javaList.add(2) javaList.add(3) val kotlinList: List<Int> = javaList.toKotlinList() in conclusion: Kotlin Stdlib Common technology makes the integration of Kotlin and Java class libraries simple and powerful.By using the Java class library, adding extension functions, and settlement conversion, we can make full use of the function of the Java library and integrate it with the characteristics of Kotlin.This greatly improves the efficiency of developers and the maintenance of code.If you want to try Kotlin development, consider combining KSC and Java libraries to enjoy the advantages brought by the Kotlin language.