CopyOnWriteArrayList listIterator() method in Java

The listIterator() method of CopyOnWriteArrayList returns an listIterator over the elements in this list in proper sequence. The listIterator does NOT support the remove, set or add methods.

Syntax: 

public ListIterator listIterator()

Parameters: The function does not accept any parameters.

Return Value: The function returns a list iterator over the elements in this list (in proper sequence)

Below programs illustrate the above function:

Program 1: 

CopyOnWriteArrayList: [32, 67, 67, 100]
The iterator values of CopyOnWriteArrayList are:
32
67
67
100

The listIterator(index) method of CopyOnWriteArrayList returns an listIterator over the elements in this list in proper sequence starting from a particular index. The listIterator does NOT support the remove, set or add methods.

Syntax: 

public ListIterator listIterator(int index)

Parameters: The function accepts a parameter index which specifies the index of the first element to be returned from the list iterator.

Return Value: The function returns a list iterator over the elements in this list starting from the specified index (in proper sequence).

Exceptions: The function throws IndexOutOfBoundsException if the index is out of range.

Below programs illustrate the above function:

Program 1: 

CopyOnWriteArrayList: [gopal, gfg, jgec, sudo]
The iterator values of CopyOnWriteArrayList are:
jgec
sudo

Program 2: 

Output: 

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 6
 at java.util.concurrent.CopyOnWriteArrayList.listIterator(CopyOnWriteArrayList.java:1107)
 at GFG.main(GFG.java:25)

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArrayList.html#listIterator--