Reverse a Linked List Find the middle of LinkedList Merge two sorted Linked List (use method used in mergeSort) to simplify code, we can use a dummyHead to avoid handling head==NULL cases Remove N-th node from back of LinkedList Add two numbers ...
Greedy problems are a class of algorithmic problems where the solution is built incrementally, selecting the most optimal choice at each step with the hope that these local optimum choices will lead to a globally optimal solution. Identification Cho...
Understanding Comparator A Comparator is an functional interface used to order objects of a user-defined class. It provides a method compare(T o1, T o2) that must be overridden to define the sorting logic. Syntax Using Anonymous Classes Comparator<...
A collection allows a group of objects to be treated as a single unit. The Java Collections Framework provides a set of standard utility classes for managing various kinds of collections. The core framework is provided in the java.util package and co...
In Java, strings are objects that represent sequences of characters. In context ofStringclass , strings are immutable. Anything within double quotes is a string in java. Two categories of string : immutable and mutable. For immutable string object...
Introduction to Exception Handling What is an Exception? An exception in Java is an event that disrupts the normal flow of the program's instructions during execution. Types of Exceptions: Checked Exceptions(Compile time): These are exceptions that ...
