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Top Questions
225
votes
How do I update an entity using spring-data-jpa?
java
jpa
spring-data-jpa
asked Aug 9 '12 at 10:33
stackoverflow.com
39
votes
newInstance vs new in jdk-9/jdk-8 and jmh
java
performance
java-8
jmh
java-9
asked Mar 14 '17 at 12:55
stackoverflow.com
24
votes
HashMap resize method implementation detail
java
java-8
hashmap
hashcode
asked Jul 30 '17 at 20:51
stackoverflow.com
23
votes
HashMap rehash/resize capacity
java
java-8
hashmap
asked Oct 7 '18 at 20:50
stackoverflow.com
18
votes
Internal changes for limit and unordered stream
java
java-8
java-stream
java-10
asked Apr 27 '18 at 14:40
stackoverflow.com
14
votes
Collectors.toUnmodifiableList in java-10
java
java-stream
java-10
asked Mar 5 '18 at 9:06
stackoverflow.com
14
votes
Milk for Coffee - Shake and Hit
coffee
milk
asked Dec 11 '14 at 7:38
cooking.stackexchange.com
14
votes
Why does using different ArrayList constructors cause a different growth rate of the internal array?
java
arraylist
collections
java-8
java-12
asked Jun 18 '19 at 10:26
stackoverflow.com
14
votes
ImmutableCollections SetN implementation detail
java
collections
java-9
asked Jul 27 '17 at 13:55
stackoverflow.com
12
votes
parallel singleton list always sequential
java
java-8
java-stream
java-9
asked Jul 11 '17 at 14:58
stackoverflow.com
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Top Answers
143
Does Java JIT cheat when running JDK code?
stackoverflow.com
134
How do I create an empty Stream in Java?
stackoverflow.com
82
Java 8 Lambda: Comparator
stackoverflow.com
66
Stream.peek() method in Java 8 vs Java 9
stackoverflow.com
65
Java 8 peek vs map
stackoverflow.com
63
Does a Future timeout kill the Thread execution
stackoverflow.com
52
Understanding JodaTime DateTime.parse(string, formatter)
stackoverflow.com
49
What is a real life example of generic <? super T>?
stackoverflow.com
49
Private constructor to avoid race condition
stackoverflow.com
47
How can I create a parallel stream from an array?
stackoverflow.com
33
Does using var with a literal result in a primitive or a primitive wrapper class?
stackoverflow.com
32
How to make `Map::get` return either an `Optional` of the found value or `Optional.empty()`
stackoverflow.com
31
What issues should be considered when overriding equals and hashCode in Java?
stackoverflow.com
31
Why are empty collections of different type equal?
stackoverflow.com
29
Java 8 Lambdas - Bitwise AND Operations
stackoverflow.com
28
Difference between Iterator and Spliterator in Java8
stackoverflow.com
28
Create Stream<T> from single object
stackoverflow.com
27
How can I create a list with N objects?
stackoverflow.com
26
Difference between compact strings and compressed strings in Java 9
stackoverflow.com
26
Why does Java not allow multiple inheritance but does allow conforming to multiple interfaces with default implementations
stackoverflow.com
26
Java 8 stream - merge collections of objects sharing the same Id
stackoverflow.com
26
Is there any need to switch to modules when migrating to Java 9+/Java 11?
stackoverflow.com
25
When and how does HashMap convert the bucket from linked list to Red Black Trees?
stackoverflow.com
25
using java Stream to get a sum, average, and sort
stackoverflow.com
25
Java 8 : Get files from folder / subfolder
stackoverflow.com
24
Why must throw statements be enclosed with a full code block in a lambda body?
stackoverflow.com
24
parallelStream vs stream.parallel
stackoverflow.com
23
How check if the lists in a list are not empty?
stackoverflow.com
23
Does String concatenation get optimized to use existing StringBuilders?
stackoverflow.com
23
Why is “while (rs.next())” necessary here?
stackoverflow.com
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