java string read line by line code example

Example 1: reading in lines from a file java

private ArrayList<String> readFileLines(String filepath) throws FileNotFoundException, IOException{
  File fp = new File(filepath);
  FileReader fr = new FileReader(fp);
  BufferedReader br = new BufferedReader(fr);

  ArrayList<String> lines = new ArrayList<>();
  String line;
  while((line = br.readLine()) != null) { lines.add(line); }

  fr.close();
  return lines;
}

Example 2: java read next line

Scanner scanner = new Scanner(new File("filename"));
while (scanner.hasNextLine()) {
   String line = scanner.nextLine();
   // process the line
}