Three simple steps
How to use this tool?
This free online converter translates C# source code into Java in three simple steps.
- Step 1
Add your C# code
Type, paste, or upload the C# code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Java.
- Step 3
Review the result
Review, copy, or download the resulting Java code from the output editor.
See it in action
Examples of C# to Java conversion
These examples show C# source code and the corresponding Java translation. Generated results can vary as AI models are updated.
Example 1
Is String Palindrome
Program that checks if a string is a palindrome or not.
C# code
Java code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
C# code
Java code
Language comparison
Key differences between C# and Java
| Characteristic | C# | Java |
|---|---|---|
| Syntax | C# syntax is similar to Java, but with some differences such as the use of the 'var' keyword for type inference and the use of properties instead of getters and setters. | Java syntax is similar to C++, but with some differences such as the use of the 'final' keyword for constants and the absence of operator overloading. |
| Paradigm | C# supports both object-oriented and functional programming paradigms. | Java supports object-oriented programming paradigm, but has limited support for functional programming. |
| Typing | C# is a statically typed language with type inference. | Java is a statically typed language without type inference. |
| Performance | C# is generally faster than Java due to its use of value types and better memory management. | Java is slower than C# due to its use of reference types and garbage collection. |
| Libraries and frameworks | C# has a large number of libraries and frameworks, including .NET Framework, ASP.NET, and Xamarin. | Java has a large number of libraries and frameworks, including Spring, Hibernate, and Android SDK. |
| Community and support | C# has a smaller community than Java, but still has a large number of developers and good support from Microsoft. | Java has a large and active community with good support from Oracle and other companies. |
| Learning curve | C# has a moderate learning curve, but is easier to learn than C++. | Java has a moderate learning curve, but is easier to learn than C++. |
Common questions
Frequently Asked Questions
How do I convert C# to Java?
Paste your C# code into the input box, confirm the languages are set to C# and Java, and click Convert. CodeConvert AI analyzes your C# code and generates equivalent Java code in seconds, preserving the original logic and structure.
What are the main differences between C# and Java?
C# and Java differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each C# construct to its closest Java equivalent. See the comparison table below for the key differences between C# and Java.
Is the converted Java code accurate?
The AI produces high-quality Java code that preserves the behavior of your original C# code and follows Java conventions. It handles common patterns, data structures, and idioms for both C# and Java. For large or performance-critical code, review and test the Java output before using it in production.
Can I convert an entire C# project to Java?
You can convert C# 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 C# to Java. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Java back to C#?
Yes. CodeConvert AI converts in both directions, so you can convert Java to C# just as easily using our Java to C# converter. Try the Java to C# Converter
Is the C# to Java 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 C# to Java without an account for up to 2 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.
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