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Java

How to initialize HashSet values by construction?

java
prompt-engineering
best-practices
collections

How do I count the number of occurrences of a char in a String?

java
prompt-engineering
functions
performance

Hashmap - Retrieving the First Key-Value Pair

java
prompt-engineering
functions
collections

Java List.contains(Object with field value equal to x)

java
equals-hashcode
stream-methods
performance-optimization

Using setDate in PreparedStatement

java
date-formatting
jdbc-date-escape-format
java-time-api

How to get a reversed list view on a list in Java?

java
list-reversal
guava-library
list-iterator

What is a stack trace, and how can I use it to debug my application errors?

java
debugging
exception-handling
best-practices

Difference between @Before, @BeforeClass, @BeforeEach, and @BeforeAll

java
test-toolbox
unit-testing
junit-5

Retrieving the inherited attribute names/values using Java Reflection

java
reflection
field-utils
apache-commons-lang

How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException

java
no-class-def-found-error
jaxb
java-9

How do I get a Date without time in Java?

java
date-formatting
java-time
localdate

Best way to create enum of strings?

java
enum
best-practices
design-patterns

Getting the IP address of the current machine using Java

java
network-programming
ip-address
datagrams

How do I discover memory usage of my application in Android?

java
memory-management
android-development
performance-optimization

What causes javac to issue the "uses unchecked or unsafe operations" warning

java
generics
type-safety
best-practices

Unable to find a @SpringBootConfiguration when doing a JpaTest

java
spring-boot
jpa
testing

Why is the Date constructor deprecated, and what do I use instead?

java
date-time-management
java-time-api
thread-safety

What are the differences between ArrayList and Vector?

java
synchronization
thread-safety
performance

What is Java Servlet?

java
servlet-container
thread-management
web-development

The AsyncTask API is deprecated in Android 11. What are the alternatives?

java
thread-management
concurrency
kotlin-coroutines