CodeBarbarian @SoftwareSiege

🛡️ Defender of clean code Coding Battlefield ⚔️ Joined January 2025

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CodeBarbarian @SoftwareSiege

12 hours ago

You don’t #understand anything until you #learn it more than one way. - Marvin Minsky

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CodeBarbarian @SoftwareSiege

12 hours ago

What will be the output of the following #Java code?

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CodeBarbarian @SoftwareSiege

12 hours ago

In #Java, use map.merge(key, value, remappingFunction) to atomically insert or update a map entry without manual checks.

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CodeBarbarian @SoftwareSiege

12 hours ago

Answer: false Why?: - Primitive arrays aren't covariant. - Covariance means subtype arrays can act as supertype arrays. - Only works for reference types. - int[] ≠ Object[] because int ≠ Object

CodeBarbarian @SoftwareSiege

3 days ago

Answer: false Why?: - Primitive arrays aren't covariant. - Covariance means subtype arrays can act as supertype arrays. - Only works for reference types. - int[] ≠ Object[] because int ≠ Object

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Computer Science @CompSciFact

2 days ago

Why IEEE floating point as two zeroes: +0 and -0 johndcook.com/blog/2010/06/1…

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Alex Xu @alexxubyte

3 days ago

TCP vs UDP

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CodeBarbarian @SoftwareSiege

2 days ago

Any fool can write code that a computer can understand. Good #programmers write code that humans can understand. - Martin Fowler

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CodeBarbarian @SoftwareSiege

2 days ago

What will be the output of the following #Java code?

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In #Java, generic type parameters are erased at runtime, so instanceof checks with specific types like List<String> are invalid. ✅ Best practice: Use instanceof with a wildcard (List<?>) or a raw type (List) only to confirm the object's non-generic type. It cannot be used to…

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CodeBarbarian @SoftwareSiege

2 days ago

Answer: ExceptionInInitializerError Why?: - When the JVM starts a #Java program, it first loads the class and executes all static initializers - which include static blocks and static field assignments. - These run before the main() method. - If an uncaught exception occurs…

CodeBarbarian @SoftwareSiege

4 days ago

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CodeBarbarian @SoftwareSiege

3 days ago

Objects of a #superclass shall be replaceable with objects of its subclasses without breaking the application - Barbara Liskov

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CodeBarbarian @SoftwareSiege

3 days ago

What will be the output of the following #Java code? Object o = new int[]{1, 2, 3}; System.out.println(o instanceof Object[]);

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CodeBarbarian @SoftwareSiege

3 days ago

In #Java, instanceof checks type compatibility at runtime. Before Java 16, manual casting was required after the check. Since Java 16, pattern matching allows casting directly within the condition. ✅ Best Practice: Use pattern matching with instanceof to simplify type checks…

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CodeBarbarian @SoftwareSiege

3 days ago

Answer: abcnull Why?: - null is treated as the string "null" when concatenated

CodeBarbarian @SoftwareSiege

5 days ago

Answer: abcnull Why?: - null is treated as the string "null" when concatenated

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CodeBarbarian @SoftwareSiege

4 days ago

There are only two kinds of #languages: the ones people complain about and the ones nobody uses. - Bjarne Stroustrup

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CodeBarbarian @SoftwareSiege

4 days ago

What will be the output of the following #Java code?

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CodeBarbarian @SoftwareSiege

4 days ago

In #Java, Integer caching applies to values between -128 and 127. Autoboxing within this range reuses the same object, so == returns true. Outside this range, new objects are created, so == returns false. ✅ Best Practice: Always use .equals() to compare wrapper objects like…

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CodeBarbarian @SoftwareSiege

4 days ago

Answer: No Why?: - The instanceof operator checks the actual runtime type of the object, not the variable’s declared type - a key aspect of polymorphism. - If the reference is null, it returns false - even if the type matches - because null doesn’t point to any object. - #Java…

CodeBarbarian @SoftwareSiege

6 days ago

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CodeBarbarian @SoftwareSiege

5 days ago

There are two ways of constructing a #software design: One way is to make it so simple that there are obviously no deficiencies... and the other way is to make it so complicated that there are no obvious deficiencies. - Tony Hoare