diff --git a/src/checkstyle/com/puppycrawl/tools/checkstyle/TreeViewer.java b/src/checkstyle/com/puppycrawl/tools/checkstyle/TreeViewer.java
deleted file mode 100644
index f57a72590..000000000
--- a/src/checkstyle/com/puppycrawl/tools/checkstyle/TreeViewer.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Created by IntelliJ IDEA.
- * User: oliver.burn
- * Date: 5/10/2002
- * Time: 15:54:58
- * To change template for new class use
- * Code Style | Class Templates options (Tools | IDE Options).
- */
-package com.puppycrawl.tools.checkstyle;
-
-import antlr.ASTFactory;
-import antlr.CommonAST;
-import antlr.collections.AST;
-import antlr.debug.misc.ASTFrame;
-import com.puppycrawl.tools.checkstyle.api.DetailAST;
-import com.puppycrawl.tools.checkstyle.api.Utils;
-
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import java.io.Reader;
-
-/**
- * A simple viewer of the AST tree. Will be replaced by something from Lars.
- *
- * @author <a href="mailto:checkstyle@puppycrawl.com">Oliver Burn</a>
- * @version 1.0
- */
-public class TreeViewer
-{
-    /**
-     * Wrapper to call the GUI.
-     * @param args a <code>String[]</code> value
-     */
-    public static void main(String[] args)
-    {
-        // Use a try/catch block for parser exceptions
-        try {
-            // if we have at least one command-line argument
-            if (args.length > 0 ) {
-                System.err.println("Parsing...");
-
-                // for each directory/file specified on the command line
-                for(int i=0; i< args.length; i++) {
-                    parseFile(args[i]); // parse it
-                }
-            }
-            else {
-                System.err.println("Usage: java Main [-showtree] "
-                                   + "<directory or file name>");
-            }
-        }
-        catch(Exception e) {
-            System.err.println("exception: "+e);
-            e.printStackTrace(System.err);   // so we can get stack trace
-        }
-    }
-
-
-    /**
-     * Display AST for a specified file.
-     * @param aFilename a <code>String</code> value
-     * @throws Exception if an error occurs
-     */
-    public static void parseFile(String aFilename)
-        throws Exception {
-        try {
-            final String[] lines = Utils.getLines(aFilename);
-            final CommentManager cmgr = new CommentManager(lines);
-            final Reader sar = new StringArrayReader(lines);
-            final Java14Lexer jl = new Java14Lexer(sar);
-            jl.setFilename(aFilename);
-            jl.setCommentManager(cmgr);
-
-            final Java14Recognizer jr = new Java14Recognizer(jl);
-            jr.setFilename(aFilename);
-            jr.setASTNodeClass(DetailAST.class.getName());
-            jr.compilationUnit();
-            final DetailAST rootAST = (DetailAST) jr.getAST();
-            // do something with the tree
-            doTreeAction(rootAST, jr.getTokenNames());
-        }
-        catch (Exception e) {
-            System.err.println("parser exception: "+e);
-            e.printStackTrace();   // so we can get stack trace
-        }
-    }
-
-    /**
-     * Display the tree for a specified node.
-     * @param t an <code>AST</code> value
-     * @param tokenNames a <code>String[]</code> value
-     */
-    public static void doTreeAction(AST t, String[] tokenNames)
-    {
-        if (t == null) {
-            return;
-        }
-
-        ((CommonAST) t).setVerboseStringConversion(true, tokenNames);
-        ASTFactory factory = new ASTFactory();
-        AST r = factory.create(0, "AST ROOT");
-        r.setFirstChild(t);
-        final ASTFrame frame = new ASTFrame("Java AST", r);
-        frame.setSize(400, 600);
-        frame.setVisible(true);
-        frame.addWindowListener(
-            new WindowAdapter() {
-                public void windowClosing (WindowEvent e) {
-                    frame.setVisible(false); // hide the Frame
-                    frame.dispose();
-                    System.exit(0);
-                }
-            }
-        );
-    }
-}