This repository contains solutions to various String and Collection-related coding problems. Each problem is implemented in Java and includes examples to demonstrate functionality.
- Reverse a String – Reverse a given string.
- Check if a String is Palindrome – Determine if a string is a palindrome.
- Count Occurrences of a Character – Count how many times a character appears in a string.
- Remove Duplicates from a String – Remove duplicate characters from a string.
- Find First Non-repeated Character – Identify the first character that appears only once.
- Check Anagram – Check if two strings are anagrams.
- Longest Palindromic Substring – Find the longest palindrome substring.
- Check if String Contains Only Digits – Verify if a string consists only of digits.
- Count Words in a String – Count the number of words in a given string.
- String Compression – Compress consecutive duplicate characters (e.g., "aabbbcc" → "a2b3c2").
- Remove All Whitespaces from a String – Remove spaces from a given string.
- Replace All Occurrences of a Character – Replace all occurrences of a character with another.
- Find the Longest Word in a String – Identify the longest word in a sentence.
- Count Vowels and Consonants in a String – Count the vowels and consonants separately.
- Convert a String to a Character Array – Convert a string into an array of characters.
- Reverse Words in a String – Reverse the order of words in a sentence.
- Substring Search – Find the starting index of a substring.
- Remove Substring from a String – Remove a given substring from a string.
- String Equality (Case-insensitive) – Compare two strings without considering case.
- Find the Number of Occurrences of a Substring – Count how many times a substring appears.
- Find the Missing Number in an Array – Identify a missing number from 1 to n.
- Find Duplicate Elements in an Array – Detect duplicates in an array.
- Find the Maximum and Minimum in an Array – Find the highest and lowest values in an array.
- Sort an Array Using
Collections.sort()– Sort a list of integers using Java’sCollections.sort(). - Merge Two Sorted Lists – Combine two sorted lists into one sorted list.
- Remove Null Elements from a List – Filter out null values.
- Check if a List Contains Duplicates – Detect duplicates using a set.
- Find the Intersection of Two Lists – Find common elements between two lists.
- Reverse a List – Reverse the order of elements in a list.
- Find the Second Largest Element in a List – Identify the second largest number.
- Find All Pairs with Given Sum in an Array – Find pairs whose sum equals a target number.
- Implement Stack Using Two Queues – Simulate a stack using queues.
- Queue Implementation Using Two Stacks – Simulate a queue using stacks.
- ArrayList vs LinkedList – Explain the differences between
ArrayListandLinkedList. - Create a Set from a List – Convert a list into a set (remove duplicates).
- Find Common Elements in Two Arrays – Identify common values in two arrays.
- Find Unique Elements in a List – Identify elements that appear only once.
- Sort a List of Strings by Length – Sort strings based on length.
- Find the Frequency of Each Element in a List – Count occurrences of each element.
- Convert a List to an Array – Convert a list into an array.
- Check if a List is a Sublist of Another List – Determine if one list is a subset of another.
- Remove Elements Divisible by 3 from a List – Remove all numbers divisible by 3.
- Find the Maximum Occurring Element in a List – Identify the most frequent element.
- Sum of Elements in a List – Calculate the total sum of a list.
- Check if a List is Empty – Verify if a list is empty.
- Shuffle a List – Randomly shuffle the elements of a list.
- Find the Union of Two Sets – Combine two sets.
- Find the Difference Between Two Sets – Identify elements in one set but not in another.
- Implement a Priority Queue – Create a priority queue.
- Count Elements Greater than a Given Value – Count how many numbers are greater than a specific value.
- Clone the repository
git clone https://github.com/amitkumar-kellton/Java_Assignment.git