Java Formatter

Instructions & Java Knowledge

How to use this tool

• Auto Response: Paste or modify the code in the left input box, and the system will automatically format it for you after you stop typing.
• Java Format: Paste messy Java code on the left, click "Format" to get clearly structured code with keyword highlighting and standard indentation. Supports smart annotation line breaks.
• Save Locally: Click the "Save Locally" button on the right to directly download the formatted or compressed code as a .java file.

Java Code Specifications

• Indentation: Official Java specifications (like Google Java Style Guide) recommend using 4 or 2 spaces for indentation (tabs are not recommended) to ensure consistent display across all editors.
• Brace Position: It is generally recommended to put the left brace { at the end of the same line as the statement (K&R style), and the right brace } on a separate line. This helps make the code more compact and coherent.
• Annotation Specifications: Annotations applied to classes or methods (like @Override, @Autowired) should usually occupy a separate line; while annotations applied to parameters can be on the same line.