Code Snippets
Tutorials, guides, and interview prep for QA automation engineers.
Pattern Matching in Strings Java | Regex & KMP Algorithm
Learn how to perform pattern matching in Java using indexOf(), Regular Expressions, and the KMP algorithm. Explore code examples, FAQs, and the best approach for tex
String Compression in Java | RLE Compression Technique
Learn how to implement string compression in Java using Run-Length Encoding (RLE). Explore compression and decompression code examples, outputs, FAQs, and performanc
Sort Words Alphabetically Java | Complete Guide
Learn how to sort words in alphabetical order in Java using Arrays.sort(), case-insensitive sorting, and Streams. Explore code examples, output, FAQs, and the best s
Count Character Frequency in String Java | Complete Analysis
Learn how to count character frequency in a Java string using HashMap, Streams, and a character array. Explore code examples, FAQs, and the best methods.
Remove Duplicate Words from Sentence Java | 2 Methods
Learn how to remove duplicate words from a sentence in Java using LinkedHashSet and Streams. Explore code examples, output, FAQs, and the best approach for text clea
Count Word Frequency in Sentence Java | HashMap Guide
Learn how to count the frequency of each word in Java using HashMap, LinkedHashMap, and Streams. Explore code examples, output, FAQs, and the best approach for text
Find Shortest Word in Sentence Java | Quick Guide
Learn how to find the shortest word in a sentence in Java using a loop, Streams, and Collections.min(). Explore code examples, FAQs, and the best approach for text a
Reverse Word Order in Sentence Java | 3 Methods Explained
Learn how to reverse the order of words in a sentence in Java using Collections.reverse(), Streams, and Stack. Explore step-by-step examples, source code, outputs, F
Reverse Each Word in Sentence Java | Step-by-Step Guide
Learn how to Reverse Each Word in Sentence Java step by step with code snippets, FAQs.
Count Words in Sentence Java | 4 Methods with Code Examples
Learn how to count words in a sentence in Java using split(), StringTokenizer, regex, Streams, and manual iteration. Includes examples, performance comparison.
Swap Two Characters in String Java | 3 Methods Explained
Swap Two Characters in String Java with all 3 Methods Explained
Check if String Contains Only Alphabets Java | Multiple Methods
Check if String Contains Only Alphabets Java with Multiple Methods explained
Check if String Contains Only Digits Java | Multiple Methods
Check if String Contains Only Digits Java
Remove Duplicate Characters from String Java | 4 Methods
Introduction Removing duplicate characters from a string is a common string manipulation problem in Java. It frequently appears in technical interviews, coding challenges, and real-world applications
Find Duplicate Characters in String Java | 4 Methods Explained
Find Duplicate Characters in String Java
Count Digits Letters Spaces Special Characters Java | Complete Guide
Count Digits Letters Spaces Special Characters Java
Check if Strings are Anagrams Java | 4 Methods Explained
Check if Strings are Anagrams Jav
Replace Character in String Java | replace() and replaceAll() Methods
Replace Character in String Java
Remove Whitespaces from String Java
remove whitespaces from string Java
Concatenate Strings Without + Operator in Java | 5 Methods Explained
Concatenate Strings Without + Operator in Java | learn all different 5 Methods Explained.