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Can anyone explain how to replace existing Java code with Kotlin within Android Studio?
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Kotlin programming language is fully compatible with Java code. It is easy to migrate from Java code to Kotlin language because of its compatibility. Therefore, when you are using Kotlin language in Android, you can easily run it from the Java code.
Android Studio does exactly the same to carry out the code conversion from Kotlin to Java. Developers may have many reasons to convert the Kotlin code into Java such as: To integrate features that are easy to implement in Java language. To resolve some performance issue that is difficult to locate in Kotlin.
Adding Java source code to an existing Kotlin project If you already have the Java classes, you can just copy them to the project directories. You can now consume the Java class from Kotlin or vice versa without any further actions. lets you call it from Kotlin like any other type in Kotlin.
If you are using android studio 3.5+, Just select your java file from your package, right click on it and select Convert Java file to Kotlin file from the bottom of popup menu
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If you've got Kotlin already configured in your Android Studio project, you can follow the steps outlined here to automatically convert with the instructions here.
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