I’m writing a console app that will run in Linux and Windows systems. This app will mainly run on JRE 1.8 environments. In my code, it needs to get a list of Java processes that run on the host running my application. I have read the posts about jps, which come as a part of JDK, but not JRE, and
Tag: java-8
Getting local variable defined in the enclosing scope must be final or effective final
I am getting “local variable defined in the enclosing scope must be final or effective final” as highlighted below. I am not sure how to fix this out in lambda expression. Answer Try replacing this: by this: The entitlePackage will be effectively final. Also your code will be much easier to read a…
Create list of objects from another list by using java8 stream
I have a list student list A and I have student list B. Student objects contains some fields like that : no,age,city,birth_date,salary My list A contains these objects My list B contains these objects What i want to do is extract student objects that ListA have but listB not and ListA and ListB have(as no,age…
Using Streams and StreamSupplier: forEach closes StreamSupplier instead of instance of stream
I am making a obj file loader for an engine that I’m writing and I am trying to use Streams to load vertex index, uvcoord, and normals from this file. The way I intended to do this was to create a new stream from a stream supplier for each type I want to load. Right now I am just trying
How to Iterate list of list of Java Objects using Java 8
How to iterate and get through list of list of objects using Java 8 Also need to get the count of distinct customerIds CustomerEditVO and CustomerIssues are POJOs Post Request body —> Answer I have created all the given POJO’s and created the objects and list for your query.And also overrides t…
Discrepancies between Java 11 and Java 8 DecimalFormat behaviour
I’ve got a weird issue with Java 11. I’m porting a huge project, and I have some tests which use DecimalFormat failing on the 11 build, but not on the 8 build. DecimalFormat in Java 11 gives me a comma decimal separator, and on Java 8 it gives me a dot. Here is a minimal reproducible example: whic…
How to round off to the closest 5 minute interval if it is 1 or 2 minutes ahead or behind?
I want to round off an Instant / LocalDateTime to its closest 5 minutes interval in Java. Examples: Suppose the time is: 2021-02-08T19:02:49.594 Expected result: 2021-02-08T19:00:00.000 Suppose the time is: 2021-02-08T19:03:49.594 Expected result: 2021-02-08T19:05:00.000 Similarly, if the time is: 2021-02-08T…
How to iterate over MultipartFile array using Java lambda and streams
Below is my code to upload some file attachments to external storage. I would like to know if there is a way to avoid for loop in the below method to iterate over the MultipartFile[] array so that everything will be done using the java streams and lambda functions. Would like to have any better way to achieve…
Comparator.comparing(…).thenComparing(…) find out which fields did not match
I am trying to compare two objects of same class and the goal is to compare them as well as identify which fields didn’t match. Example of my domain class @Builder(toBuilder=true) class Employee { …
How to convert an array of map into a map in JAVA8?
Right now I have How to use JAVA8 stream to convert it into Update: Sorry I was being unclear. The map_array contains two maps, and each map has two entries with the first one being key as “k”, value as “k1” and second entry being key as “v” and value as “v1”. N…