What is the difference between array and vector

Skip to content. This post will discuss the difference between an array and a Vector in Java. Rate this post. We are sorry that this post was not useful for you!

Tell us how we can improve this post? Submit Feedback. Thanks for reading. Like us? Refer us to your friends and help us grow. Notify of. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Computer Organization. Discrete Mathematics. Ethical Hacking.

Computer Graphics. The first statement of the code creates the vector object. The second statement returns an iterator that points to the first element of the vector. The next two statements increment the pointer to point to 'D'.

The statement after assigns' C' to ch. In that code segment, the last statement inserts 'C' in front of 'D', using the iterator. As for the array, there is no way an element can be inserted. Because of limitations like this for the array, the vector and other containers were designed. Appending means adding elements at the back. The array cannot be appended to. The only way to work around this problem for the array is to create an array for the maximum size envisaged.

Put in elements from the beginning. Then some space cells will be left behind in the array. Then if there is any need to add elements at the back, fit the elements values in the spaces behind that are empty that have default values.

For the vector, an element can be erased using the iterator. The iterator will then point to the next element, which was there before the erasing took place. The output is nothing. The best thing to do with the array is to replace all the elements with some default value. With the integer, the default value is 0. The following code illustrates:.