The first time you're reading the line without processing it in the while loop, then you're reading it again but this time you're processing it. readLine() method reads a line and displaces the reader-pointer to the next line in the file. Hence, every time you use this method, the pointer will be incremented by one pointing to the next line.

This:

 while ((newLine = br.readLine()) != null) {
        newLine = br.readLine();
        System.out.println(newLine);
        lines.add(newLine);
    }

Should be changed to this:

 while ((newLine = br.readLine()) != null) {
        System.out.println(newLine);
        lines.add(newLine);
    }

Hence reading a line and processing it, without reading another line and then processing.

You can do something like this:

BufferedReader reader = new BufferedReader(new FileReader(<<your file>>));
List<String> lines = new ArrayList<>();
String line = null;
while ((line = reader.readLine()) != null) {
    lines.add(line);
}

System.out.println(lines.get(0));

With BufferedReader you are able to read lines directly. This example reads the file line by line and stores the lines in an array list. You can access the lines after that by using lines.get(lineNumber).