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Online Java to Kotlin Converter

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Additional Instructions

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 on the "Convert" button.
The converted Kotlin code 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 Code:

Kotlin Code:

Example 2 - Even or Odd

A well commented function to check if a number if odd or even.

Java Code:

Kotlin Code:

Differences

The following are some 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.

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