How to write a java program to remove comments from a java file and store it in another file? [on hold]

I need a java program that uses buffers or streams to read a java file and remove all the comment lines from the file and store it in another file.I hv a sample code but i need other methods to do the same

import java.io.*;
public class remove{
public static void main(String args[]) { 
try{
InputStream inputStream = new FileInputStream("C:/Users/Administrator.E2INFO/Desktop/Nambi/GuestRoomService.java");
Reader reader= new InputStreamReader(inputStream);
OutputStream outputStream = new FileOutputStream("C:\\Users\\Administrator.E2INFO\\Desktop\\Nambi\\output.java");
Writer writer= new OutputStreamWriter(outputStream);
boolean inBlockComment = false;  
boolean inSlashSlashComment = false;  
    int char1 = reader.read();  
    if (char1 != -1) {  
        int char2;  
        while (char1 != -1) {  
            if ((char2 = reader.read()) == -1) {  
                writer.write(char1);  
                break;  
            }  
            if (char1 == '/' && char2 == '*') {  
                inBlockComment = true;  
                char1 = reader.read();  
                continue;  
            } else if (char1 == '*' && char2 == '/') {  
                inBlockComment = false;  
                char1 = reader.read();  
                continue;  
            } else if (char1 == '/' && char2 == '/' && !inBlockComment) {  
                inSlashSlashComment = true;  
                char1 = reader.read();  
                continue;  
            }  
            if (inBlockComment) {  
                char1 = char2;  
                continue;  
            }  
            if (inSlashSlashComment) {  
                if (char2 == '\n') {  
                    inSlashSlashComment = false;  
                    writer.write(char2);  
                    char1 = reader.read();  
                    continue;  
                } else if (char1 == '\n') {  
                    inSlashSlashComment = false;  
                    writer.write(char1);  
                    char1 = char2;  
                    continue;  
                } else {  
                    char1 = reader.read();  
                    continue;  
                }  
            }  
            writer.write(char1);  
            char1 = char2;  
        }  
        writer.flush();  
        writer.close();  
    }  
}
catch(IOException e)
{
System.out.println(e);
}     
}
}