Arraylist is an index based Data Structure. While using Arraylist for searching or getting an element from an array with index is pretty fast. ArrayList
Tag: Java collections
Convert List to a Set / Set to List in Java
In Java, When we are working on real time projects.. Generally we came across scenarios like Converting List to Set Object or Vice Versa. 1.
How to iterate HashMap in Java ?
public static void printMap(Map mp) { Iterator it = mp.entrySet().iterator(); while (it.hasNext()) { Map.Entry pair = (Map.Entry) it.next(); System.out.println(pair.getKey() + ” = ” +
Why List = new ArrayList() ? in Java
The main reason you’d do this is to decouple your code from a specific implementation of the interface. When you write your code like this: