Java: Remove Comments, Annotations and Extra Spaces From Source Code

I have written Java code for removing comments, annotations and extra spaces from Java source code.

package com.dukesoftware.utils.text;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import com.dukesoftware.utils.io.IOUtils;

public class JavaSourceUtils {
    public static void main(String[] args) throws FileNotFoundException, IOException {
        String cleanedUpSource = removeCommentAndAnnotation(IOUtils.userDirectory(
                "workspace2/DukeSoftwareUtils/src/main/java/com/dukesoftware/utils/text/JavaSourceUtils.java"
                ));
        System.out.println(cleanedUpSource);
    }

    public static final String removeCommentAndAnnotation(File file) throws IOException {
        try(BufferedReader br = new BufferedReader(new FileReader(file)))
        {
            return removeCommentAndAnnotation(br);
        }
    }
    
    private final static int CODE = 0;
    private final static int IN_STRING = 1;
    private final static int LINE_IN_COMMENT = 2;
    private final static int IN_CHAR = 3;

    public static final String removeCommentAndAnnotation(BufferedReader reader) throws IOException {
        String line;
        StringBuilder result = new StringBuilder();
        int status = CODE;
        while((line = reader.readLine()) != null){
            line = line.trim();
            if (line.isEmpty()) continue;
            if (line.startsWith("@")) continue;
              
            char[] chars = line.toCharArray();
            for(int current = 0; current < chars.length; current++)
            {
                char c = chars[current];
                final int next = current+1;
                switch(c)
                {
                case '\\':
                    current++;
                    result.append(c);
                    if(next < chars.length) result.append(chars[next]);
                    break;
                case '/':
                    if(status == CODE)
                    {
                        if(next < chars.length)
                        {
                            if(chars[next] == '/')
                            {
                                current = chars.length; // skip rest of line
                            }
                            else if(chars[next] == '*')
                            {
                                status = LINE_IN_COMMENT;
                            }
                            else
                            {
                                result.append(c);
                            }
                        }
                        else
                        {
                            result.append(c);
                        }

                    }
                    else if(status == IN_STRING || status == IN_CHAR)
                    {
                        result.append(c);
                    }
                    break;
                case '*':
                    if(status == LINE_IN_COMMENT &&  next < chars.length && chars[next] == '/')
                    {
                        status = CODE;
                        current++;
                    }
                    else
                    {
                        result.append(c);
                    }
                    break;
                case '"':
                    if(status == CODE)
                    {
                        status = IN_STRING;
                    }
                    else if(status == IN_STRING)
                    {
                        status = CODE;
                    }
                    result.append(c);
                    break;
                case '\'':
                    if(status == CODE)
                    {
                        status = IN_CHAR;
                    }
                    else if(status == IN_CHAR)
                    {
                        status = CODE;
                    }
                    result.append(c);
                    break;
                default:
                    result.append(c);
                    break;
                }
            }
            result.append("\n");
        }
        return result.toString();
    }
}