In -depth analysis of the technology of Kotlin Stdlib Common framework in the Java library

In -depth analysis of the technical principles of Kotlin Stdlib Common framework in the Java class library Introduction: Kotlin is a static type programming language based on JVM, which is more and more widely used in Android development.Kotlin's standard library (STDLIB) is a powerful and fully functional tool set that provides many convenient functions and classes that can be used to simplify the development process.The COMMON framework of the Kotlin standard library is a library that can be shared between Kotlin and Java. It makes full use of Kotlin's characteristics and expression capabilities, which can be easily used in the Java code. The interoperability between Java and KOTLIN: Kotlin is very compatible with Java and can be seamlessly integrated with the existing Java code.It can directly call the methods and variables in Java, and the Java code can also call the method and variables in Kotlin.In the Kotlin standard library COMMON framework, some optimization and adaptation of Java's special needs are made. The technical principle of using the Kotlin standard library COMMON framework in the Java class library: 1. Convert Kotlin code to Java code: The Kotlin standard library COMMON framework uses Kotlin's compiler characteristics to convert the Kotlin code into a Java code.In this way, the Java library can directly use the functions and classes provided by KOTLIN. For example, the LET function in the Kotlin standard library can be used to perform specific operations and return the operating results.When the KOTLIN code is converted to a Java code, the Let function will be converted into an ordinary static method, so that the Java class library can call it like other Java static methods. Kotlin code example: val result = someValue?.let { it.doSomeOperation() } Java code example: Object result = SomeValue.INSTANCE.let(new Function1<SomeValue, Object>() { public final Object invoke(SomeValue it) { return it.doSomeOperation(); } }); 2. Provide API compatibility: The Kotlin Standard Library COMMON framework also provides some special APIs to make the Java class library more convenient to use these features.These APIs can be compatible with Java's grammar and agreement, enabling Java developers to seamlessly use the Kotlin library. For example, the extension function in Kotlin can be converted into a static method so that the Java library can directly call these methods.In addition, the default parameters in Kotlin can also be used in the Java library. Kotlin code example: fun String.capitalizeWords(separator: String = " "): String { ... } Java code example: StringExtensions.capitalizeWords("Hello World", " "); Conclusion: The Kotlin standard library COMMON framework is very convenient to use in the Java class library, allowing Java developers to use Kotlin's functions and classes.By converting the Kotlin code into a Java code and providing compatible API, the Kotlin standard library Common framework makes the interoperability between Java and KOTLIN become more seamless and improves development efficiency.If you are developing Java applications, you may wish to consider introducing the Kotlin standard library Common framework in the Java code to enjoy Kotlin's powerful characteristics and expression capabilities.