Java Guides

Java Program to Find Duplicate Elements in an Array

Java Program to Reverse an Array in Place (Two-Pointer Approach)

Java Program to Find Second Largest Element in an Array

Java Program to Find Largest and Smallest Elements in an Array

Java Program to Find Sum of Digits of a Number

Java Program to Swap Two Numbers Without Using a Third Variable

Java Program to Check Perfect Number (With Examples)

Java Program to Find GCD of Two Numbers (Euclidean Algorithm)

Java Program to Check Palindrome Number (Without Using String)

Java Program to Reverse an Integer Without Converting to String

Java Program to Check Armstrong Number (3 Ways)

Java Program to Find Factorial of a Number (3 Ways)

Java Program to Print Fibonacci Series Up to N Terms (3 Ways)

Java Program to Check if a Number Is Prime (3 Ways)

Java Program to Find the First Repeated Character in a String (3 Ways)

Java Program to Remove All Whitespace from a String (3 Ways)

Java Program to Check if One String Is a Rotation of Another (3 Ways)

Java Program to Count Words in a String (3 Ways)

Java Program to Reverse Each Word in a String Without Changing Word Order

Java Program to Count Vowels and Consonants in a String (3 Ways)

Java Program to Check if a String Is a Palindrome (3 Ways)

Java Program to Reverse a String Without Using StringBuilder.reverse()

Java Program to Check if Two Strings Are Anagrams (3 Ways)

How to Reverse a String Using Java Streams (With Examples)

Java Program to Find the First Non-Repeated Character in a String

Java Program to Count Occurrences of Each Word in a String

How to Count Duplicate Characters in a String in Java (3 Ways)