ADevGuide Java
Java learning path from interview fundamentals to design patterns and coding problem-solving.
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Java String Quiz: 16 MCQ Questions with Answers
Series: Java Interview & Problem Solving Series
Test your Java String knowledge with 16 MCQ questions and answers covering String, StringBuilder, StringBuffer, and SCP basics.
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Kids With the Greatest Number of Candies: LeetCode Java Solution
Series: Java Interview & Problem Solving Series
Solve Kids With the Greatest Number of Candies in Java with a simple LeetCode approach, explanation, constraints, and example walkthrough.
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Merge Strings Alternately: LeetCode Java Solution
Series: Java Interview & Problem Solving Series
Solve Merge Strings Alternately in Java with a simple LeetCode approach, step-by-step explanation, constraints, and sample test cases.
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Reverse Integer in Java: Simple Explanation and Code
Series: Java Interview & Problem Solving Series
Learn how to reverse an integer in Java without using built-in APIs, with a simple code example and step-by-step explanation.
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Reverse Words in a String III: LeetCode Java Solution
Series: Java Interview & Problem Solving Series
Solve Reverse Words in a String III in Java with a clean LeetCode approach, example walkthrough, constraints, and test cases.
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Robot Return to Origin: LeetCode Java Solution
Series: Java Interview & Problem Solving Series
Solve Robot Return to Origin in Java with a simple LeetCode approach, move-count logic, constraints, and example walkthrough.
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Is Java Pass by Value or Pass by Reference?
Series: Java Interview & Problem Solving Series
Understand why Java is pass by value with clear examples for primitives, objects, and collections, plus the common interview trap.
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Java Interfaces Explained: How to Code to an Interface
Series: Java Interview & Problem Solving Series
Learn Java interfaces with clear examples and understand what 'code to an interface' means for flexibility, testing, and cleaner design.
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Java Regex Quiz: 20 MCQ Questions with Answers
Series: Java Interview & Problem Solving Series
Test your Java regex knowledge with 20 MCQ questions and answers covering Pattern, Matcher, syntax basics, and common matching rules.
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Singleton Pattern in Java: Explanation and Examples
Series: Java Design Patterns Series
Learn the Singleton pattern in Java with common implementations, thread-safety trade-offs, and practical examples you can reuse.