Code that creates a linked list of type String

// create a linked list of type String
LinkedList codes = new LinkedList();

// add three strings
codes.add("mbdk");
codes.add("citr");
codes.add(0, "warp");

System.out.println(codes);

Resulting output

Code that adds elements to the beginning and end of the linked list

codes.addFirst("wuth");
codes.addLast("wooz");

System.out.println(codes);

Resulting output

Code that uses an enhanced for loop to process the linked list

for (String s : codes)
    System.out.println(s);

Resulting output

Code that retrieves the first and last elements of the linked list

String firstString = codes.removeFirst();
String lastString = codes.removeLast();
System.out.println(firstString);
System.out.println(lastString);
System.out.println(codes);

Resulting output