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The clear() method removes all elements from the ArrayList, or we can say it is used to clear an ArrayList in Java. In this post, we are going to discuss the clear() method of the ArrayList class in detail. Method declaration – public void clear() What does it do? – It will remove all elements

In this post, we will look at the addAll() method of the ArrayList class in detail. There are two overloaded implementations of the addAll() method. public boolean addAll(Collection c) public boolean addAll(int index, Collection c) Let’s look at the above methods one by one. public boolean addAll(Collection c) Method declaration – public boolean addAll(Collection c)

add() method is used to add the elements into the ArrayList. There are two overloaded implementations of the add method for the ArrayList class. public boolean add(E e) public void add(int index, E element) Let’s look at the overloaded methods one by one public boolean add(E e) Method declaration – public boolean add(E e) What

ArrayList is a resizeable array implementation of the List interface. It implements all of the list operations and provides methods to manipulate the size of an array that is used internally to store the elements. ArrayList class is equivalent to the Vector class, except that it is unsynchronized. We can think of ArrayList as a

The isEmpty() method helps us in finding out whether a vector is empty or not. In this post, we are going to discuss the isEmpty() method of the vector class in detail. Method declaration – public synchronized boolean isEmpty() What does it do? – It tells us whether the vector is empty or not by

trimToSize() method is used to trim the capacity of the vector to its current size. It can be used to minimize the storage of the vector but it can also increase the amount of incremental reallocation and hence can decrease the performance. Method declaration – public synchronized void trimToSize() What does it do? – It