In this article, we will compare the Java Error class and the Java Exception class. Both exceptions and errors are subclasses of the Throwable class. The error indicates a problem that mainly occurs due to the lack of system resources and our application should not catch these types of problems.  ... Read More

A Map is an object that stores key-value pairs, where each key is unique but values can repeat. The HashMap is a type of Map that uses a hashtable in order to store these pairs. Now we will discuss the differences between ConcurrentHashMap and Synchronized Hashmap. What is a ConcurrentHashMap? ... Read More

Comparable and Comparator both are an interface that can be used to sort the elements of the collection. Comparator interface belongs to java.util package while comparable belongs to java.lang package. Comparator interface sort collection using two objects provided to it, whereas comparable interface compares" this" refers to the one objects ... Read More