Java

Why would one declare a Java interface method as abstract?

Why would an Enum implement an Interface?

strategy-pattern

enum-implementation

interface-implementation

Why there is no ConcurrentHashSet against ConcurrentHashMap

Why should I use Hamcrest matcher and assertThat() instead of traditional assertXXX() methods?

test-development

Why should I use Deque over Stack?

Why is String.chars() a stream of ints in Java 8?

performance-optimization

primitive-types

Why is Maven downloading the maven-metadata.xml every time?

Why is exception.printStackTrace() considered bad practice?

logging-best-practices

exception-handling

Why is Double.MIN_VALUE not negative?

floating-point-arithmetic

Why is (a*b != 0) faster than (a != 0 && b != 0) in Java?

branch-prediction

performance-optimization

jvm-optimizations

Why explicitly throw a NullPointerException rather than letting it happen naturally?

exception-handling

Why do Java programmers like to name a variable "clazz"?

Why doesn't "System.out.println" work in Android?

android-logging

Why doesn't String switch statement support a null case?

switch-statement

Why does Maven warn me about encoding?

encoding-warnings

Why does appending "" to a String save memory?

string-interning

memory-optimization

garbage-collection

Why an abstract class implementing an interface can miss the declaration/implementation of one of the interface's methods?

programming-to-an-interface

design-patterns

Which is the best library for XML parsing in Java?

xml-parser-comparison

Which concurrent Queue implementation should I use in Java?

concurrent-programming

queue-implementation

Where is the documentation for the `values()` method of Enum?

compiler-generated-methods

explain.codes / Java