Since this method continues to search through the input looking for a line separator, it may buffer all of the input while searching for the end of the line if no line separators are present. The read position is then set to the beginning of the next line, which will be read and returned upon calling the method again.
This method returns the rest of the current line, excluding any line separator at the end of the line. This method advances the scanner past the current line and returns the input that wasn't reached initially. To read the line and move on, we should use the nextLine() method.
The hasNextLine() method returns true if there is another line in the input of this scanner, but the scanner itself does not advance past any input or read any data at this point. A Scanner breaks its input into tokens using a delimiter pattern, which in our case is the newline character: Scanner scanner = new Scanner( new File( "filename")) One of the easiest ways of reading a file line by line in Java could be implemented by using the Scanner class. There are a few different options to choose from when you need to read a file line by line. It also allows us to break up the data into logical pieces, like if the file was CSV-formatted. Being able to read a file line by line gives us the ability to seek only the relevant information and stop the search once we have found what we're looking for.
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