かんたんなCSVReader

import java.io.*;
import java.util.ArrayList;

public class CSVReader {
    BufferedReader _reader;
    int _delimiter;
    
    
    public CSVReader(BufferedReader reader) {
        this._reader = reader;
        this._delimiter = ',';
    }
    public CSVReader(BufferedReader reader,int delimiter) {
        this._reader = reader;
        this._delimiter = delimiter;
    }
    public String[] readLine(){
        try {
            String line = this._reader.readLine();
            if(line == null) return null;
            
            String[] fields = parseLine(line);
            return fields;
            
        } catch (Exception e) {
            e.printStackTrace(System.err);
            return null;
        }
        
    }
    void close(){
        try {
            this._reader.close();
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
        
        
    }
    String[] parseLine(String s){
        try {
            java.util.ArrayList<String> elements = new ArrayList<String>();
            
            StringReader reader = new StringReader(s);
            StringWriter elementWriter = new StringWriter();
            int c = 0;
            boolean inQuots = false;

            while( (c = reader.read()) != -1){
                if(c == 0) continue;
                if(c == this._delimiter){
                    if(!inQuots){
                        elements.add(elementWriter.toString() + "");
                        elementWriter = new StringWriter();
                        continue;
                    }
                    elementWriter.write(c);
                    continue;
                    
                }
                if(c == '"'){
                    if(!inQuots){
                        inQuots = true;
                        continue;
                    }
                    else{
                        inQuots = false;
                        continue;
                    }
                }
                if(c == '\\'){
                    c = reader.read();
                    if(c == -1) break;
                    
                    if(c == 'r'){
                        elementWriter.write('\r');
                        continue;
                    }
                    if(c == 'n'){
                        elementWriter.write('\n');
                        continue;
                    }
                    if(c == 't'){
                        elementWriter.write('\t');
                        continue;
                    }
                    if(c == 'f'){
                        elementWriter.write('\f');
                        continue;
                    }
                    if(c == 'b'){
                        elementWriter.write('\b');
                        continue;
                    }
                    if(c == 'u'){
                        //読み飛ばす！
                        reader.read();
                        reader.read();
                        reader.read();
                        reader.read();
                        continue;
                    }
                    if(c == '\\'){
                        elementWriter.write('\\');
                        continue;
                    }
                }
                elementWriter.write(c);
            }
            String sss = elementWriter.toString();
            elements.add(sss + "");
            
            String[] result = elements.toArray(new String[elements.size()]);
            return result;
            
        } 
        catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace(System.err);
            return null;
        }
        
    }
    
}