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5 posts (filtered) Category: Java & JVM
implements vs extends in Java
implements vs extends in Java

A practical, example-driven guide to implements vs extends in Java: what they mean, how they differ, when to use each, and how to fold good interface and inheritance…

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Category: Java & JVM #java #jvm #backend development #inheritance #interfaces #oop #implements #extends
int vs Integer in Java: What They Are, Why Both Exist, and How to Choose
int vs Integer in Java: What They Are, Why Both Exist, and How to Choose

Java was designed with primitives for performance and memory efficiency. Later, Java introduced generics, Collections, and object-oriented APIs that need reference types. Wrapper classes (like Integer) bridge primitives…

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Category: Java & JVM #java #jvm #backend development #ffi #foreign function interface #interop #abi #binary compatibility #primitives #boxing
OptionalInt vs Optional in Java: When to Use Which (and Why)
OptionalInt vs Optional in Java: When to Use Which (and Why)
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Category: Java & JVM #java #jvm #backend development #optional #null safety #optionalint #when #use
String vs StringBuilder vs StringBuffer in Java
String vs StringBuilder vs StringBuffer in Java
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Category: Java & JVM #java #jvm #backend development #strings #performance #string #stringbuilder #stringbuffer
Understanding ArrayLists in Programming
Understanding ArrayLists in Programming

An ArrayList is a resizable array implementation provided in many programming languages (for example, java.util.ArrayList in Java or List in C#). Unlike regular arrays that have a fixed…

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Category: Java & JVM #java #jvm #backend development #arrays #data structures #programming fundamentals #arraylist #java collections #arraylists #programming