what does count to in java code example

Example: java count

public static void main(String[] args) 
    { 
  
        // creating a list of Integers 
        List<Integer> list = Arrays.asList(0, 2, 4, 6, 
                                           8, 10, 12); 
  
        // Using count() to count the number 
        // of elements in the stream and 
        // storing the result in a variable. 
        long total = list.stream().count(); 
  
        // Displaying the number of elements 
        System.out.println(total); 
    }