#143 · Programming Language Tools Developer Tool

Java Viewer

Create a clean, line-numbered Java source view with optional wrapping, comment visibility, import folding, and whitespace normalization for reviews, debugging, and documentation.

Developer Input

Readable Java source view

Java source code

public class Greeting {
	// Returns a friendly message.
	public String hello(String name) {
		return "Hello, " + name;
	}
}

Processing mode

Tab width

spaces

Show line numbers Preserve empty lines Highlight markers Auto-run while typing

How to use this developer tool

Paste or type the source code in the input editor.
Select the processing mode and adjust the numeric threshold or indentation option.
Enable the checks needed for this task.
Run the tool, review the status and report, then copy or download the result.

What this developer tool does

Readable java source rendering is produced locally in your browser and remains copy-ready.

Normalizes line endings and tabs, optionally filters or outlines code, and prefixes stable line numbers without altering the original source.

The output is plain-text and remains safe to copy into issue trackers, documentation, or code review comments.

Example

Input: Paste the included sample source. Output: Run Java Viewer to produce a declaration report, validation result, formatted source, conversion, or generated template. The sample is executable and can be replaced with your own code.

Tips for better output

Use complete source files when possible so declarations and scopes can be detected reliably.
Run formatter or viewer output through the relevant validator before committing changes.
For compiler-authoritative results, verify the final code with the target JDK or .NET SDK.

FAQ

How do I use a Java Viewer online?

Paste your Java source, select the required mode and options, then run the tool to produce a copy-ready result and analysis report.

Can this Java Viewer process code without uploading it?

Yes. Processing runs locally in the browser, so the source is not sent to a server by this page.

What errors can the Java Viewer detect?

The tool detects the common structural, delimiter, declaration, formatting, or conversion issues relevant to its selected mode.

Does the Java Viewer support large source files?

It is optimized for large pasted files and debounces automatic processing, though extremely large or generated files may be better handled in an IDE.

Is the Java Viewer a replacement for a compiler?

No. It is a fast browser-based development aid; compile with the appropriate JDK or .NET SDK for authoritative results.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Analysis modules

Module	Purpose
Lexical masking	Protects comments and literals during structural analysis.
Source analysis	Readable Java source rendering.
Live metrics	Characters, lines, bytes, status, and measured processing time.

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