Free Java to Swift 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 Swift 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 Swift code from the conversion will be displayed in the output box.
Examples
The following are examples of code conversion from Java to Swift 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
Swift
Example 2 - Even or Odd
A well commented function to check if a number if odd or even.
Java
Swift
Key differences between Java and Swift
| Characteristic | Java | Swift |
|---|---|---|
| Syntax | Java uses a C-style syntax with curly braces and semicolons. | Swift uses a more modern and concise syntax with optional semicolons and a focus on readability. |
| Paradigm | Java is primarily an object-oriented programming language, but also supports procedural and functional programming. | Swift is a multi-paradigm language that supports both object-oriented and functional programming. |
| Typing | Java is statically typed, which means variable types are checked at compile-time. | Swift is also statically typed, but it supports type inference, which allows for shorter and more expressive code. |
| Performance | Java is known for its good performance and is often used for high-performance applications. | Swift is designed to be fast and efficient, and it performs well in most scenarios. |
| Libraries and frameworks | Java has a vast ecosystem of libraries and frameworks, including popular ones like Spring and Hibernate. | Swift has a growing ecosystem of libraries and frameworks, but it is not as extensive as Java's. |
| Community and support | Java has a large and active community with extensive documentation and support resources. | Swift has a growing community, but it is not as large as Java's. However, it is backed by Apple, which provides official documentation and support. |
| Learning curve | Java has a moderate learning curve, especially for beginners. It has a lot of concepts to learn, but there are plenty of resources available. | Swift has a relatively low learning curve, especially for those familiar with other modern programming languages. It has a clean and intuitive syntax. |
Frequently Asked Questions
How do I convert Java to Swift?
Paste your Java code into the input box, confirm the languages are set to Java and Swift, and click Convert. CodeConvert AI analyzes your Java code and generates equivalent Swift code in seconds, preserving the original logic and structure.
What are the main differences between Java and Swift?
Java and Swift differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each Java construct to its closest Swift equivalent. See the comparison table below for the key differences between Java and Swift.
Is the converted Swift code accurate?
The AI produces high-quality Swift code that preserves the behavior of your original Java code and follows Swift conventions. It handles common patterns, data structures, and idioms for both Java and Swift. For large or performance-critical code, review and test the Swift output before using it in production.
Can I convert an entire Java project to Swift?
You can convert Java files one at a time by pasting each file's code. For a full migration, convert each file and then review how classes, dependencies, and project structure map from Java to Swift. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Swift back to Java?
Yes. CodeConvert AI converts in both directions, so you can convert Swift to Java just as easily using our Swift to Java converter. Try the Swift to Java Converter
Is the Java to Swift converter free, and do I need to install anything?
Yes, it is free and runs in your browser with nothing to install and no IDE extension required. You can convert Java to Swift without an account for up to 5 conversions per day. Sign in for free for higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro converter with more powerful AI models, a built-in chat assistant, code execution, saved conversion history, and personal notes. Every free account includes 5 credits and supports up to 25,000 characters of input per conversion, with no credit card required.
