Парс и все что с ним связано

for(String nextLine : Files.readAllLines()) {
       //code
}

BufferedReader br = new BufferedReader(new FileReader(FILE_PATH)
String line;
while ((line = br.readLine()) != null)
//do some stuff

	public static LinkedHashMap<String, HashMap<String, String>> loadCSV(String name, boolean showLog, int idx)
	{
		LinkedHashMap<String, HashMap<String, String>> data = new LinkedHashMap<>();
		LineNumberReader lnr = null;

		try
		{
			File file = new File(name);
			lnr = new LineNumberReader(new BufferedReader(new FileReader(file)));
			String line = null;
			String[] head = null;

			if (showLog)
				_log.info("Loading file " + name + "...");

			while ((line = lnr.readLine()) != null)
			{
				if (line.trim().length() == 0)
					continue;

				line = line.trim();

				if (head == null)
				{
					head = line.split("\t");
					continue;
				}

				String[] vals = line.split("\t");

				HashMap<String, String> _data = new HashMap<>();

				for (int i = 0; i < vals.length; i++)
					_data.put(head[i], vals[i]);

				data.put(vals[idx], _data);
			}
		}
		catch (FileNotFoundException e)
		{
			_log.error("File " + name + " not found.");
		}
		catch (Exception e)
		{
			_log.error("File " + name + " loading failed.");
		}
		finally
		{
			try
			{
				if (lnr != null)
					lnr.close();
			}
			catch (Exception e1)
			{}

			if (showLog)
				_log.info("File " + name + " loaded.");
		}

		return data;
	}

	public static LinkedHashMap<String, HashMap<String, String>> loadDAT(String name, boolean showLog, int... idx)
	{
		LinkedHashMap<String, HashMap<String, String>> data = new LinkedHashMap<>();
		LineNumberReader lnr = null;

		try
		{
			File file = new File(name);
			lnr = new LineNumberReader(new BufferedReader(new FileReader(file)));
			String line = null;

			if (showLog)
				_log.info("Loading file " + name + "...");

			while ((line = lnr.readLine()) != null)
			{
				if (line.trim().length() == 0)
					continue;

				line = line.trim();
				String[] vals = line.split("\t");

				HashMap<String, String> _data = new HashMap<>();
				String[] key = new String[idx.length];
				int kIdx = 0;
				
				for (int i = 0; i < vals.length; i++)
				{
					String[] t = vals[i].split("=");

					if (t.length < 2)
						t = new String[] { t[0], "" };

					if (ArrayUtils.contains(idx, i))
						key[kIdx++] = t[1];

					_data.put(t[0], t[1]);
				}

				data.put(Strings.join("_", key), _data);
			}
		}
		catch (FileNotFoundException e)
		{
			_log.error("File " + name + " not found.");
		}
		catch (Exception e)
		{
			_log.error("File " + name + " loading failed.", e);
		}
		finally
		{
			try
			{
				if (lnr != null)
					lnr.close();
			}
			catch (Exception e1)
			{}

			if (showLog)
				_log.info("File " + name + " loaded.");
		}

		return data;
	}