Linked List of Double

Notice that only the testing program needs to be changed. No change is needed for the GenericLinkedList class nor for the GenericNode class.

 
public class GenericLinkedListTester
{
  public static void main( String[] args )
  {
    // create an empty generic linked list
    GenericLinkedList<Double> list = new GenericLinkedList<>(); 
    
    // insert some doubles (autoboxed)
    // each literal must look like a double (include a decimal point)
    // for autoboxing to create a Double
    list.insertFirst( 4.0 );
    list.insertFirst( 3.3 );
    list.insertFirst( 2.2 );
    list.insertFirst( 1.0 );
   
    list.traverse();
    System.out.println("\n"); 
    
    // test getFirst()
    System.out.println("First: " + list.getFirst() );
    list.deleteFirst();
    list.traverse();
    System.out.println("\n"); 
    System.out.println("New First: " + list.getFirst() );
      
    // test getLast()
    System.out.println("Last : " + list.getLast() );
 
  }
}