Use Java filter on stream with in a stream filter

Use Java filter on stream with in a stream filter

Content Index :

Use Java filter on stream with in a stream filter
Tag : java , By : Wilfred Knigge
Date : January 11 2021, 05:14 PM

wish helps you You can use anyMatch on the inner stream:

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Java 8 stream findFirst throwing NPE, Unable to filter out nonNull objects from stream

Tag : java , By : brennen
Date : March 29 2020, 07:55 AM
it fixes the issue You're calling filter() on the Optional>, instead of calling it on the Stream.
Optional<String> innerValue = Optional.ofNullable(outermost) // outermost var can be null, hence using Optional.ofNullable
            .map(nestedList -> nestedList.stream().filter(Objects::nonNull))

Java 8 Stream filter to filter specific portion of a file

Tag : java , By : John Bentley
Date : March 29 2020, 07:55 AM
I hope this helps you . There is a java 9 stream api takeWhile and dropWhile, which take a predicate as an argument.
takeWhile(s->s.contains("Another input"))
.dropWhile(s->s.contains("Input data"))
 Stream<String> output = Files
    List<String> partition = output
        .filter(new StartData())
        .filter(new EndData())
class StartData implements Predicate<String> {

  boolean matchingData = false;

  boolean test(String input) {
    if (input.contains("Input data")) {
      matchingData = true;
    return matchingData;
class EndData implements Predicate<String> {

  boolean passThrough = true;

  boolean test(String input) {
    if (input.contains("Another Input")) {
      passThrough = false;
    return passThrough;

Collect stream only if allMatch filter and process stream once in Java

Tag : java , By : Anonymous
Date : March 29 2020, 07:55 AM
seems to work fine I have the following stream code: , This would be a job for Java 9:
List<Data> results = items.stream()
    .map(item -> requestDataForItem(item))
    .takeWhile(data -> data.isValid())
List<Data> results = new ArrayList<>();
for(Item item: items) {
    Data data = requestDataForItem(item);
    if(!data.isValid()) break;

filter duplications by property name with java stream filter

Tag : java , By : silvervino
Date : March 29 2020, 07:55 AM
Does that help You may first create a map using the task name as the key and the relevant Task as the value. Ignore the duplicate Tasks merely by using a mergeFunction. Then get all the distinct tasks as a Set view.
Set<Task> distinctTasks = tasks.stream().collect(Collectors.collectingAndThen(
    Collectors.toMap(Task::getName, Function.identity(), 
        (a, b) -> a), m -> new HashSet<>(m.values())));

Java Stream filter - how can i filter data without wrapping the filter code in 'if' condition for checking null on the f

Tag : development , By : user158220
Date : March 29 2020, 07:55 AM
it should still fix some issue I am doing the following: , An additional option is to do the null checks in the predicate:
.filter(o -> source.equals(o.getSource()) 
             && (null == date || date.equals(o.getDate()))
             && (null == id || id.equals(o.getId())))
Related Posts Related QUESTIONS :
  • I cant generate the proper code to select the a specific filter on a BI dashboard I am working on
  • How to Inject Dependencies into a Servlet Filter with Spring Boot Filter Registration Bean?
  • Thrift types as a Generic
  • Effective algorithm to random 4 unique integers less than a big max such as 100_000
  • Combining or and negation in Java regex?
  • Unable to instantiate default tuplizer Exception
  • Multi-tenant migration to work with quarkus
  • Ignite persisting a Set: Cannot find metadata for object with compact footer
  • Maven cannot resolve Jacob dependency using eclipse
  • testcontainers oracle database container starts before database user is created
  • Launching two spring boot apps in integration test
  • Is there a way to add a HashMap's value that is a integer array into a ArrayList?
  • Is there any way that I can get a parameter in paintComponent?
  • Empty stack with one recursive method and one iterative method
  • What's the behavior of onBackpressureBuffer in RxJava2
  • Java regex can only use 1 quantifier in a lookback (need 2)
  • How to fix error in native query : it is showing syntax error near or at
  • How to retrieve nested object from a document and display it in FirestoreRecyclerOptions?
  • Why not use ListIterator for full LinkedList Operation?
  • Android Webview EvaluateJavascript sometimes does not return a response
  • Matcher java doesn't work but regex seems to be good
  • Finding dimensions of a .gif file
  • Java Number format how to change +/- sign to custom text
  • Entity partially saved when using JOINED inheritance strategy and setting spring.jpa.properties.hibernate.jdbc.batch_siz
  • Stored Procedure in Java Spring Boot Project returns null as Output
  • How to solve org.hibernate.MappingException which is causing due to inheriting a class
  • Clean Archtecture. Understanding of scheme
  • Processing 3 triangle not showing in Javafx 8 Window tab
  • How to specify a sequence-based generated value in Hibernate 5 via legacy mapping
  • Spring-boot application not getting auto-deployed on startup
  • How to only pass strings that the user select
  • Is there a way to SELECT using "GREATEST(field1, field2)" where field1 and field2 are aggregate sums in the sa
  • How to handle JSON objects wrapped into one JSON object with retrofit2?
  • Configure Hazelcast CPSubsystem Retries Timeout
  • how to use onBindViewHolder with multiple items in android RecyclerView
  • No ParameterResolver registered for parameter in BeforeAll method
  • Finding the path in a graph with the least casualties according to the lanchester square law
  • MongoWriteException when inserting into Mongodb with composite custom _id
  • Fetch Oracle procedure metadata with Java when multiple procedure signatures
  • Value modification of key-pair in HashMap and impact for a HashCode
  • Migration from solrj to spring-data-solr
  • How to check if you're still connected to the database with jpa
  • Use Date type in the graphql scheme
  • Split and add the string based on length
  • Is "main" method of spring boot application required when deploy as war
  • Getting the average within specific numbers in an array
  • how to use izpack to make my jar application to installer?
  • What is meant by src in Java Eclipse?
  • Create a mirrored linked list in Java
  • Examples of good JPA Java Desktop Application
  • Translate Java to Python -- signing strings with PEM certificate files
  • Algorithm Analysis tool for java
  • Java serial comm API - what does inputstream.read() return if a timeout occurs?
  • How do I make a background thread in Java that allows the main application to exit completely? This works in Linux, but
  • How to add an image dynamically at runtime in java
  • Java App on Mac asking for allow network connections everytime
  • Best actively maintained Java XMPP Library?
  • Multi-Threaded Application - Help with some pseudo code!
  • Scoping a StringBuilder inside a for loop
  • How to specify hash algorithm when updating LDAP via Java?
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com