Here you can find the source of readLine(File f)
public static List<String> readLine(File f)
//package com.java2s; //License from project: Open Source License import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; public class Main { public static List<String> readLine(InputStream in) { List<String> result = new ArrayList<String>(); BufferedReader reader = null; try {/*from w ww . j a v a 2s. co m*/ reader = new BufferedReader(new InputStreamReader(in, "utf-8")); String line = null; while ((line = reader.readLine()) != null) result.add(line); } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } public static List<String> readLine(File f) { try { return readLine(new FileInputStream(f)); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } }