ANTLR is a powerful parser generator for multiple programming languages including Java.

ANTLR contains 2 major modules:

• Runtime - For building and executing parsers/lexers generated in Java.
• Tool (The Parser Generator) - For generating parsers/lexers Java class.

ANTLR Runtime Source Code files are provided in the distribution packge (antlr4-4.10.1.zip). You can download them at ANTLR Website.

You can also browse the source code below:

⏎ org/antlr/v4/runtime/misc/TestRig.java

/*
 * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

package org.antlr.v4.runtime.misc;

import java.lang.reflect.Method;

/** A proxy for the real org.antlr.v4.gui.TestRig that we moved to tool
 *  artifact from runtime.
 *
 *  @deprecated
 *  @since 4.5.1
 */
@Deprecated
public class TestRig {
	public static void main(String[] args) {
		try {
			Class<?> testRigClass = Class.forName("org.antlr.v4.gui.TestRig");
			System.err.println("Warning: TestRig moved to org.antlr.v4.gui.TestRig; calling automatically");
			try {
				Method mainMethod = testRigClass.getMethod("main", String[].class);
				mainMethod.invoke(null, (Object)args);
			}
			catch (Exception nsme) {
				System.err.println("Problems calling org.antlr.v4.gui.TestRig.main(args)");
			}
		}
		catch (ClassNotFoundException cnfe) {
			System.err.println("Use of TestRig now requires the use of the tool jar, antlr-4.X-complete.jar");
			System.err.println("Maven users need group ID org.antlr and artifact ID antlr4");
		}
	}
}

⏎ org/antlr/v4/runtime/misc/TestRig.java

Or download all of them as a single archive file:

File name: antlr-runtime-4.10.1-sources.jar
File size: 308953 bytes
Release date: 2022-04-15
Download 

⇒ ANTLR Tool Source Code

⇐ What Is ANTLR Parser Generator

⇑ Download and Review ANTLR Parser Generator

⇑⇑ FAQ for ANTLR Parser Generator