java-8 Questions
3
Solved
I've read the documentation, but I still can't get when I should use one or the other:
OffsetDateTime
ZonedDateTime
According to documentation OffsetDateTime should be used when writing date t...
11
Solved
I start using new update Android Studio 4.0.0 and following the enable support java 8 library desugaring in D8 and R8:
compileOptions {
// Flag to enable support for the new language APIs
coreLi...
Estelaestele asked 20/6, 2020 at 5:12
13
I was learning through interfaces when I noticed that you can now define static and default methods in an interface.
public interface interfacesample2 {
public static void method() {
System.out...
4
Solved
When I type Arrays.sort(arr) in Eclipse, I get this error Arrays cannot be resolved and when I left click the red underlined Arrays word I don't get import java.util.Arrays as expected.
I installed...
8
I need to install some packages and Linux programs on my android devices. for example I want to use something similar YUM or get-apt command (I know these are Linux Commands) through windows powers...
6
Solved
I have the following expression:
scheduleIntervalContainers.stream()
.filter(sic -> ((ScheduleIntervalContainer) sic).getStartTime() != ((ScheduleIntervalContainer)sic).getEndTime())
.collect...
Hearsh asked 2/3, 2016 at 7:3
15
Solved
I am wondering if there is a way to get current milliseconds since 1-1-1970 (epoch) using the new LocalDate, LocalTime or LocalDateTime classes of Java 8.
The known way is below:
long currentMil...
Belted asked 29/5, 2014 at 22:57
7
Solved
My colleague and I had a bug that was due to our assumption that an empty stream calling allMatch() would return false.
if (myItems.allMatch(i -> i.isValid()) {
//do something
}
Of course,...
Merocrine asked 13/5, 2015 at 18:53
5
I am trying to generate keystore using keytool and getting below error -
D:\Java\bin>keytool -importkeystore -srckeystore cert1.p12 -srcstoretype pkcs12 -destkeystore cert1.keystore -deststorety...
Upas asked 6/12, 2021 at 10:30
5
Solved
I have the following code which could be much simpler using Java 8 stream API:
List<List<String>> listOfListValues;
public List<String> getAsFlattenedList() {
List<String>...
Fawnfawna asked 28/11, 2018 at 9:3
6
Solved
I want to implement a Stream<T>.
I don't want to just use implements Stream<T>, because I would have to implement a ton of methods.
Can this be avoided?
To be more concrete, how can ...
Biggers asked 6/6, 2015 at 17:27
10
Solved
I can't get my head around the difference between thenApply and thenCompose.
So, could someone provide a valid use case?
From the Java docs:
thenApply(Function<? super T,? extends U> fn)
Re...
Vaticinate asked 25/3, 2017 at 16:47
10
Solved
I just downloaded the latest version, SonarQube 4.3,
then try build a java-8 project with:
mvn clean install
mvn sonar:sonar
That gives me the Exception below.
Googling, I got the impression...
11
Solved
class Employee {
public string department;
public int salary;
}
List<Employee> allEmployees = ...
I need to have a list that will have only 1 top salary employee for each department. all...
8
Solved
I'm trying to format an Instant to a String using the new Java 8 Date and Time API and the following pattern:
Instant instant = ...;
String out = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:...
Makeshift asked 10/8, 2014 at 13:36
6
My task is to make an advanced search with Spring Data REST.
How can I implement it?
I managed to make a method to do a simple search, like this one:
public interface ExampleRepository extends Cr...
Juanajuanita asked 25/3, 2016 at 15:27
6
Solved
Why does this throw a java.lang.NullPointerException?
List<String> strings = new ArrayList<>();
strings.add(null);
strings.add("test");
String firstString = strings.stream()
...
Multiplicity asked 8/9, 2015 at 20:36
1
Solved
The following code snippet runs without error in Java 8. However, when I run the same code in Java 17 it fails.
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
public c...
9
Solved
I cannot load a font from an S3 Inputstream in JRE 8. I do not have issue if a system is installed with JRE 7, JDK 7, or even JDK 8.
val fontInputStream = s3Client.getObject(bucketName, objectKey)...
5
Solved
Such as in .Net, which provides several implementations of the Action delegate (equivalent to Java Consumer functional interface) with different number and type of arguments, I was expecting that J...
Jewelry asked 16/7, 2014 at 11:8
3
Solved
What's the advantage of using Spring Async vs. Just returning the CompletableFuture on your own?
Selfcontradiction asked 21/6, 2017 at 19:55
4
Solved
I want to be able to convert a List to a HashMap where the key is the elementName and the values is a list of something random (in this case its the Element Name). So in short I want (A->List(A)...
Yaakov asked 23/7, 2014 at 17:27
2
Description
When I develop my java project I use:
Java version: 1.8,
Apache Tomcat version 9.0.x
Then, I use Tomcat 10.0.x to run my project (with few modifications in my project). I had to change ...
3
Solved
I have a class like this
public class Example {
private List<Integer> ids;
public getIds() {
return this.ids;
}
}
If I have a list of objects of this class like this
List<Example...
11
Solved
I have a list of Integer list and from the list.stream() I want the maximum value.
What is the simplest way? Do I need comparator?
Gyrostat asked 13/7, 2015 at 8:10
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