Why character array is better than String for Storing password in Java Why character array is better than String for storing password in Java was recent question asked to one of my friend in a java interview. he was interviewing for a Technical lead position and has over 6 years of experience.Both Character array and String can be used to store text data but choosing one over other is difficult question if you haven't faced the situation already. But as my friend said any question related to String must have a clue on special property of Strings like immutability and he used that to convince interviewer. here we will explore some reasons on why should you used char[] for storing password than String. This article is in continuation of my earlier interview question post on String e.g. Why String is immutable in Java or How Substring can