LinkedList()

LinkedList(Collection c)

1)  void add(Object o): Adds an item to the list.

list. Ladd("hello"); 

2)  void add(int index, Object o) : adds an element to a defined position.

list.add(3, "position3"); 

3)  void addAll(Collection c): Adds items from another data collection such as ArrayList. It throws an exception. NullPointerException  if the collection is null.

LinkedList linkedlist = new LinkedList(); 
ArrayList arraylist= new ArrayList(); 
arraylist.add("123"); 
arraylist.add("456"); 
linkedlist.addAll(arraylist); 

4)  void addAll(int index, Collection c): Adds items from another data collection such as ArrayList starting from a given position. It throws an exception. NullPointerException  if the collection is zero and  IndexOutOfBoundsException  If you have exceeded the capacity of the .

linkedlist.addAll(3, arraylist) capacity. 

5)  void clear(): clears the contents of the list.

list.clear(); 

6)  Object clone(): returns a copy of the list.

System.out.println("linkedList: "+list); 
Object str= list.clone(); 
System.out.println("str: "+str); 

Output:

linkedList: [object1, object2, object3]
str: [object1, object2, object3]

7)  boolean contains(Object o): Checks if the object is present in the list. If the element exists, it returns true otherwise false.

boolean var = list.contains("String"); 

8)  Object get(int index): returns the element to the given index.

Object elt = llist.getLast(); 

9)  int indexOf(Object o): returns the index of a given object.

int pos = llist.indexOf("o2"); 

10)  int lastIndexOf(Object o): returns the index of the last occurrence of a given object.

int lastpos = llist.lastIndexOf("o6"); 

11)  Object remove(int indice): deletes an object with the given index.

llist.remove(4); 

12)  Object remove(Object o): Removes a specific object from the list.

llist.remove("o6"); 

13)  Object removeFirstOccurrence(Object o): deletes the first occurrence encountered.

llist.removeFirstOccurrence("hello"); 

14)  Object removeLastOccurrence(Object o): Deletes the last occurrence encountered.

llist.removeLastOccurrence("hello"); 

15)  Object set(int indice, Object o): change the value of an element to a specific index.

llist.set(llist.sise()-1, "good evening"); 

Put "good evening" in the last position of the list, we put "-1" so as not to exceed the size of the list.

16)  int size(); returns the current size or total number of objects in the list.

llist.size(); 

LinkedList-specific methods

list.addFirst("string"); 

5)  void removeFirst(): removes the element from the first position.

list.removeFirst(); 

6)  void removeLast(): removes the element from the last position.

list.removeLast(); 

LinkedList example