Online Java to Kotlin Converter
Click to select or drop your input code file here.
You can also type the input code below.
How to use this tool?
This free online converter lets you convert code from Java to Kotlin in a click of a button. To use this converter, take the following steps -
- Type or paste your Java code in the input box.
- Click the convert button.
- The resulting Kotlin code from the conversion will be displayed in the output box.
Examples
The following are examples of code conversion from Java to Kotlin using this converter. Note that you may not always get the same code since it is generated by an AI language model which is not 100% deterministic and gets updated from time to time.
Example 1 - Is String Palindrome
Program that checks if a string is a palindrome or not.
Java
Kotlin
Example 2 - Even or Odd
A well commented function to check if a number if odd or even.
Java
Kotlin
Key differences between Java and Kotlin
| Characteristic | Java | Kotlin |
|---|---|---|
| Syntax | Java has a verbose syntax with a lot of boilerplate code, whereas Kotlin has a concise and expressive syntax that reduces the amount of code needed to accomplish the same task. | Kotlin has a concise and expressive syntax that reduces the amount of code needed to accomplish the same task compared to Java. |
| Paradigm | Java is an object-oriented programming language that supports imperative and declarative programming paradigms, whereas Kotlin is a statically-typed programming language that supports both object-oriented and functional programming paradigms. | Kotlin is a statically-typed programming language that supports both object-oriented and functional programming paradigms. |
| Typing | Java is a statically-typed language, which means that the type of a variable is determined at compile-time, whereas Kotlin is also a statically-typed language but supports type inference, which means that the type of a variable can be inferred by the compiler. | Kotlin is a statically-typed language that supports type inference, which means that the type of a variable can be inferred by the compiler. |
| Performance | Java has a reputation for being fast and efficient due to its Just-In-Time (JIT) compiler, which compiles bytecode into machine code at runtime. Kotlin also has good performance, but it is slightly slower than Java due to its additional features. | Kotlin has good performance, but it is slightly slower than Java due to its additional features. |
| Libraries and frameworks | Java has a vast collection of libraries and frameworks, including Spring, Hibernate, and Struts, which are widely used in enterprise applications. Kotlin can also use these libraries and frameworks, but it also has its own set of libraries and frameworks, such as Ktor and Anko. | Kotlin can use Java's vast collection of libraries and frameworks, but it also has its own set of libraries and frameworks, such as Ktor and Anko. |
| Community and support | Java has a large and active community with a wealth of resources and support available, including documentation, forums, and tutorials. Kotlin's community is growing rapidly, but it is still smaller than Java's. | Kotlin's community is growing rapidly, but it is still smaller than Java's. However, there are still a wealth of resources and support available, including documentation, forums, and tutorials. |
| Learning curve | Java has a steep learning curve due to its verbose syntax and complex concepts, such as object-oriented programming and memory management. Kotlin has a much gentler learning curve due to its concise syntax and ease of use. | Kotlin has a much gentler learning curve than Java due to its concise syntax and ease of use. |
Frequently Asked Questions
How do I convert Java to Kotlin using CodeConvert AI?
Simply paste your Java code into the input box and click the Convert button. Our AI will analyze your Java code and produce equivalent Kotlin code in seconds, preserving the original logic and structure.
Is the converted Kotlin code accurate?
The AI produces high-quality Kotlin code that preserves the logic and functionality of your original Java code. It handles common patterns, data structures, and idioms for both Java and Kotlin. For complex or performance-critical code, we recommend reviewing and testing the output.
Can I also convert Kotlin back to Java?
Yes! CodeConvert AI supports bidirectional conversion. You can convert Kotlin to Java just as easily by using our Kotlin to Java converter. Try the Kotlin to Java Converter
Is the Java to Kotlin converter free?
Yes. You can convert Java to Kotlin for free without creating an account for up to 5 conversions per day. For higher limits and additional features, you can sign up for a Pro account.
What types of Java code can be converted to Kotlin?
This tool can convert a wide range of Java code to Kotlin, from simple functions and algorithms to complete programs with classes, error handling, and complex logic. The AI understands both Java and Kotlin idioms and produces natural-looking code.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro tool, which includes more powerful AI models, an integrated chat assistant, code execution, personal notes, conversion history, and an enhanced interface. Every new account comes with 5 free credits to explore the full Pro experience.
