What is the difference between a list and an arraylist in java

Like Article. Next Array vs ArrayList in Java. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. These methods add an element to the list by their index. Methods inside the list may throw an exception like UnsupportedOperationException if the method is unable to modify the list. When one object in a list is incompatible with another object in the list, then ClassCastException is thrown. Null elements are not allowed in the list if you try to insert a null object in the list, NullPointerException is thrown.

You can obtain an element from the list using get method. You can set the value of an element in the list using set method. You can also get the sublist from the list using a method sublist. It becomes convenient to operate on the sublist instead of a list. One of the standard Collection classes is ArrayList which extends AbstractList class and also implements the List interface.

The ArrayList class is used to create the dynamic arrays that grow and shrunk whenever required. Package Access Modifiers Encapsulation. Reinforcement Learning. R Programming. React Native. Python Design Patterns. Python Pillow. Python Turtle. Verbal Ability. Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures.

Operating System. Also, the resulting list is compressed, and indexes of subsequent elements are decremented by one. Elements in a list can also be referenced by the invoking object.

An array list provides the below methods: 1 void add int index, Object obj It inserts a specified element at a specified position and will throw an exception IndexOutOfBoundsException when the mentioned index is out of range. It makes sure that it can hold a minimum number of elements which is specified as the capacity.

It returns NullPointerException if the array is null. Conclusion As a result, the array list is the solution to the problem of a memory of a static array.

When a user uses an array list, the dynamic array is created, which can be increased whenever required. The normal list extends the collection class. Also, it is better to increase the capacity of an array in the beginning than reallocating the memory later. Manipulation is slow in the array list as shifting needs to be done if any element is removed from a list.

In a list, you can perform different operations of positional access, searching and range view as well. This has been a guide to the top differences between Java List vs Array List. Here we also discuss the key differences with infographics and comparison table.