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JAVA QUESTIONS

Java Instant round up to the next second
Java Instant round up to the next second
wish helps you You can cover the corner case by using .getNano to make sure the time is not exactly even on the second and then add the extra second using .plusSeconds() when there is a value to truncate.
TAG : java
Date : November 26 2020, 06:28 AM , By : theobvious89
Android: Issue using JSON library in pure java package
Android: Issue using JSON library in pure java package
To fix this issue For anyone who ever experiences the same issue, this is my hack fix. I decided to use gsonAgain, I have to emphasize that this is for a DECOUPLED JAVA PACKAGE. If you are attempting to import the JSON library in a regular Android pa
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040714
DaggerTestApplicationComponent not generated missing binding...Unsure about this
DaggerTestApplicationComponent not generated missing binding...Unsure about this
seems to work fine The error basically says you are trying to inject the ScreenNavigator into the BaseActivity but Dagger does not know how to get an instance due to a missing provides method or you miss the @Inject annotation for the constructor of
TAG : java
Date : November 26 2020, 06:23 AM , By : subodh tiwari
Spring Data Specification with JPA subquery
Spring Data Specification with JPA subquery
wish of those help I would like to execute subquery from Spring Data Specification. It must be like this SQL statement: , I found the way to execute subquery:
TAG : java
Date : November 26 2020, 06:23 AM , By : Gobinda
alternative to LocalTime checking if time is in range between two times
alternative to LocalTime checking if time is in range between two times
I hope this helps you . I have a code that supports only API Level >= 26 in android: , What about something like below. Not tested though.
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040629
NetworkOnMainThreadException using RX2 in Android
NetworkOnMainThreadException using RX2 in Android
hop of those help? You have this exception because you make network call on Android MainThread in this line: URLConnection connection = myUrl.openConnection(); Rx handle multithreading by Schedulers (subscribeOn(Schedulers.newThread()) in your code).
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040615
Spring Integration on how to combine both paths for mutiple variables
Spring Integration on how to combine both paths for mutiple variables
help you fix your problem A new class needs to be created with a constructor and getter/setters.. also note that you can define two .uriVariable on the handle request as well.
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040507
Should I create Presenter and Model for each Activity or not?
Should I create Presenter and Model for each Activity or not?
this one helps. In short, There is no limitation, it's completely up to you and depends on your project structure. So, you have to find the best one that suits your project.
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040506
How to put .min() or .max() as method parameter for a stream?
How to put .min() or .max() as method parameter for a stream?
With these it helps How can I pass the .min() or .max() expression as a method parameter in a code like this: , The method is
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040493
How to avoid insertion of non existent foreign keys in join table for @AssociationOverrides
How to avoid insertion of non existent foreign keys in join table for @AssociationOverrides
I hope this helps . I found out the problem. Spring boot by default uses MyIsam engine which doesnt create foreign key associations. I changed the hibernate dialect to org.hibernate.dialect.MySQL5InnoDBDialect and now the foreign key associations are
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040453
Different JSON Web Encryption(JWE) tokens generated for same key by Java and .Net 4.6
Different JSON Web Encryption(JWE) tokens generated for same key by Java and .Net 4.6
Hope that helps That's the normal behaviour. In addition to the key materials, an Initialization Vector (IV) is generated during the computation of the token (see step 9. in section 5.1 of the RFC7516).This IV shall be a random byte string and entrop
TAG : java
Date : November 26 2020, 06:23 AM , By : Pamu12
Apache Kafka Client (Java) : List topics and check whether topic is log compacted
Apache Kafka Client (Java) : List topics and check whether topic is log compacted
hop of those help? You should use the AdminClient API to retrieve that information. First use listTopics() to retrieve the topic list. Then use describeConfigs() to get the configuration for each topic. Finally, out of the ConfigEntry objects you'll
TAG : java
Date : November 26 2020, 06:23 AM , By : user3040437
android : calling an api continuously with delay
android : calling an api continuously with delay
Hope this helps i need to call two APIs continuously using retrofit. one should be called every 10 seconds and one should be called every 3 seconds. which one is the most efficient method for this purpose. thread, coroutine, rxjava , ... . , RxJava i
TAG : java
Date : November 26 2020, 06:23 AM , By : Chrisanda Ann
How to receive Date from Mongodb without NumberLong or Date Wrapper in Java
How to receive Date from Mongodb without NumberLong or Date Wrapper in Java
around this issue You need to build a JSON serializer which can convert NumberLong to Long. You can use the following settings and pass in Document.toJson() as a parameter and get the expected output.
TAG : java
Date : November 26 2020, 06:23 AM , By : Roma1n
Gradle is unable to find zip artifact in composite build if java plugin is applied
Gradle is unable to find zip artifact in composite build if java plugin is applied
I wish this helpful for you The following setup should work with Gradle 5.6 (when using another attribute it will likely also work with previous versions). It mostly corresponds to your original setup with the exception of the changes indicated by XX
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040376
How to capture string with java regular expression if I do not want the first 10 characters to be "0"
How to capture string with java regular expression if I do not want the first 10 characters to be "0"
wish help you to fix your issue You should just be able to use a negative look behind like this: (?Here is a regex101 for you to see it working: https://regex101.com/r/l7pX8c/1
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040354
Combination of several methods in RXJava2
Combination of several methods in RXJava2
hope this fix your issue Suppose You have two Obsevable: one from server and another from databaseYou can merge them into one stream like below:
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040331
Is it good practice or necessary to use a Service to use a Media Player in the backgound
Is it good practice or necessary to use a Service to use a Media Player in the backgound
may help you . Here is a Music Service that I implemented in my book. https://github.com/Wickapps/Practical-Android-MusicService This implementation includes play, stop, and seek forward, but you could add other functions. Service is the best archite
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040329
Benefits of @FunctionalInterface in staged builders
Benefits of @FunctionalInterface in staged builders
I wish this help you In this pattern, your RequireUser, RequireSessionId and RequireMailboxId need to be functional interfaces in order for builder() method of the MailboxCreatedBuilder type to look like
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040315
Developing with azure cosmos db emulator where cloud is blocked environment
Developing with azure cosmos db emulator where cloud is blocked environment
may help you . The Cosmos DB emulator is running locally on your machine or in Docker.This means that you should be able to either install the emulator as a service or pull the docker image and run it in your machine. The emulator won't call anything
TAG : java
Date : November 26 2020, 06:18 AM , By : Shelly Altman
Postman showing HTML instead of JSON
Postman showing HTML instead of JSON
hop of those help? Doesn't matter that Postman is sending Basic authentication header, when you haven't enabled Basic authentication in Spring.Since you only called formLogin() to enable form based authentication, you have to login using the form POS
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040290
RecyclerView scrolls to bottom whenever I load the data from Firebase
RecyclerView scrolls to bottom whenever I load the data from Firebase
it should still fix some issue In your for loop, move your populateMessagesRecyclerView() , out of it
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040287
Async method in abstract class
Async method in abstract class
may help you . It was all because someAsyncTask was final.It was final to prevent this method from beeing @Override.
TAG : java
Date : November 26 2020, 06:18 AM , By : Tanner Barnes
How to update list view with 'titles'
How to update list view with 'titles'
this will help I don't believe that you issues are SQLite based, but rather that the issues are with the retrieval of the data.Issues could be :-
TAG : java
Date : November 26 2020, 06:18 AM , By : amulya acharya
Resize columns as they are displayed - NatTable
Resize columns as they are displayed - NatTable
like below fixes the issue When you are scrolling fast, the executed commands could not match the updated state in scrolling. Probably a runtime issue as the commands in use are not really intended to work on scrolling.I am running out of ideas to su
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040215
Check if one number is equal to another
Check if one number is equal to another
Any of those help If you want to change level at every 50 points you can do it like below:
TAG : java
Date : November 26 2020, 06:18 AM , By : Steve Chang
How to display the images in recyclerview?
How to display the images in recyclerview?
Hope this helps These are the list of pictures i want from databaseI have a firebase database from where iam getting a list of lmages and out it in recyclerview. Iam able to get the url of all the images but i cannot display the images in my imagevie
TAG : java
Date : November 26 2020, 06:18 AM , By : user111264
Install4J: stderr and return code redirection into variable gets written only once
Install4J: stderr and return code redirection into variable gets written only once
I think the issue was by ths following , I could solve the issue by adding this line to the second screen's preactivation script:
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040131
How to correctly deal with time saving on server and client side
How to correctly deal with time saving on server and client side
To fix the issue you can do Your Question is rather confused. If you have a moment in UTC, you know the offset-from-UTC is zero, so you do not care about further time zone information.
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040130
How to Implement Microsoft Graph API using Java and Maven
How to Implement Microsoft Graph API using Java and Maven
it should still fix some issue Maven and Gradle are just build tools. You can use that sample, just need to create a pom.xml file with dependencies used in build.gradle file. I have done that for you.pom.xml
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040102
Why list of String has no forEach method?
Why list of String has no forEach method?
Any of those help Short answer: Arrays don't have a forEach method defined on them.Longer answer: Because it doesn't need it. An array type (using [], not List) represents a low level structure in memory, more suited to low level optimisations rather
TAG : java
Date : November 26 2020, 06:18 AM , By : user3040093
SwipeRefresh layout progress bar is not hiding even after completion
SwipeRefresh layout progress bar is not hiding even after completion
around this issue I am using MVVM pattern in which I am using SwipeRefresh layout to refresh recycler view in my layout.When I am pulling it then it continue to refresh even after method completed successfully. , To disable the progress dialog add th
TAG : java
Date : November 25 2020, 12:01 PM , By : user3040075
Gson.toJson()"Exception java.lang.IllegalArgumentException: class java.text.DecimalFormat declares multiple JSON fi
Gson.toJson()"Exception java.lang.IllegalArgumentException: class java.text.DecimalFormat declares multiple JSON fi
Does that help I am trying to make a JSON file to use it as a database. my classes are: 1. Sheep: includes some info about every sheep 2. Farm: includes an array of Sheeps 3. DB: here I am trying to parse the Farm object into JSON , The exception
TAG : java
Date : November 25 2020, 12:01 PM , By : user3040052
JPA batch inserts does not improve performance
JPA batch inserts does not improve performance
fixed the issue. Will look into that further After trying a batch size of 1000 with a postgresql server on localhost (https://gareth.flowers/postgresql-portable/ v10.1.1), the execution runs under 3 seconds. So it seems the code or configuration is n
TAG : java
Date : November 25 2020, 12:01 PM , By : user3040011
Removing items from a queue in Java
Removing items from a queue in Java
seems to work fine Just to consider an alternative.You can use an ArrayList which gives you random access with the get() method.
TAG : java
Date : November 25 2020, 12:01 PM , By : user3040003
How does java compiler "most specific method calling rule" work?
How does java compiler "most specific method calling rule" work?
I hope this helps . Java will always try to use the most specific version of a method that is available. The two methods
TAG : java
Date : November 25 2020, 12:01 PM , By : user3039996
Creating arrays with reference variables and casting
Creating arrays with reference variables and casting
wish help you to fix your issue I am preparing for the OCA Java SE 8 exam and there is a code example that shows errors that I don't understand. , That is because on line2
TAG : java
Date : November 25 2020, 12:01 PM , By : Tintin
How do I make sure cache key and object id is the same when using Ignite together with mysql as a 3rd party persistent s
How do I make sure cache key and object id is the same when using Ignite together with mysql as a 3rd party persistent s
it fixes the issue Can you resort to UUIDs? Otherwise, if you have AUTO INCREMENT in DB you will have to create entries in DB and then load them up in cache.
TAG : java
Date : November 25 2020, 12:01 PM , By : user3039982
Java 8: ArrayDeque<>.poll returning null in parallel environment
Java 8: ArrayDeque<>.poll returning null in parallel environment
I hope this helps you . From the Javadoc:
TAG : java
Date : November 25 2020, 12:01 PM , By : user3039971
How to create conditional AuthenticationProvider in Spring-Security?
How to create conditional AuthenticationProvider in Spring-Security?
help you fix your problem You can configure multiple Authentication providers like below. Each authentication provider is tested in order and the one which is successful first provides the authenticated data and the others are skipped. A similar use
TAG : java
Date : November 25 2020, 12:01 PM , By : user3039965
How does 100% - 40 wοrk in Java?
How does 100% - 40 wοrk in Java?
I wish this helpful for you , The formatting here is important to read it properly.
TAG : java
Date : November 25 2020, 12:01 PM , By : SeoOcean
How do I unwrap a list of list wrapped items in Jackson?
How do I unwrap a list of list wrapped items in Jackson?
To fix this issue I have a bean that resembles this: , If every list has a structure like below:
TAG : java
Date : November 25 2020, 12:01 PM , By : user3039899
How to add the Default data from Ldif file to the Ldap Server with the java api?
How to add the Default data from Ldif file to the Ldap Server with the java api?
should help you out It can also be achieved via LdapTemplate. LdapParser will parse the record from ldif file in the form of LdapAttribute then bind this record via ldapTemplate.bind
TAG : java
Date : November 25 2020, 12:01 PM , By : user3038889
MongoDb comparing two fields in same collection, in java
MongoDb comparing two fields in same collection, in java
will help you there are many way to deal with your problemfirstly you can use $where to do this
TAG : java
Date : November 25 2020, 12:01 PM , By : user3038867
Accessing FUT Web App from a Java application
Accessing FUT Web App from a Java application
I wish this help you I've managed to access the site with success, using Selenium framework.
TAG : java
Date : November 25 2020, 12:01 PM , By : user3038865
Insert Instant datetime into MySql database with millisecond precision in java
Insert Instant datetime into MySql database with millisecond precision in java
This might help you MySQL has FROM_UNIXTIME() function that can take long values inside and returns a representation of the unix_timestamp in 'YYYY-MM-DD hh:mm:ss' or 'YYYYMMDDhhmmss.uuuuuu' format. Reference from their manual here: FROM_UNIXTIME()Si
TAG : java
Date : November 25 2020, 12:01 PM , By : gyip05
How to convert Date from (ddmmyyyy HH:mm:ss) to (yyyy-MM-dd HH:mm:ss.SSS)?)
How to convert Date from (ddmmyyyy HH:mm:ss) to (yyyy-MM-dd HH:mm:ss.SSS)?)
it helps some times I assume that you work with Java 8 or later. If so please drop old and horrible java.util.Date and and even worse java.text.SimpleDateFormat they are dead and buried. Switch to use of java.time package. in order to solve your prob
TAG : java
Date : November 25 2020, 12:01 PM , By : user3038837
Java Application Client Freezed with an JNIWrapper exception
Java Application Client Freezed with an JNIWrapper exception
this one helps. This method was removed in JDK8, while it was still there in JDK7.As jniwrapper is a commercial product, you should ask them for an updated version. From the release notes, version 3.10 should do the trick.
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038792
How do i make sure that the ID of object im adding to array doesn't exist without getting nullpointerexception?
How do i make sure that the ID of object im adding to array doesn't exist without getting nullpointerexception?
hop of those help? The problem is that you are reading it the wrong way, I assume. As you are dealing with strings, there is no way to separate them from each other without a delimiter, in this case, a newline. You should use Scanner.nextLine, NOT Sc
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038729
Code Coverage for every (different) input data
Code Coverage for every (different) input data
wish help you to fix your issue Code coverage is the percentage of code which is covered by automated tests. Code coverage measurement simply determines which statements in a body of code have been executed through a test run, and which statements ha
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038713
Is there a function in java which helps to format and return the formatted date as output?
Is there a function in java which helps to format and return the formatted date as output?
seems to work fine Avoid legacy date-time classes I'm trying to format date in java using SimpleDateFormat class.
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038710
How to reuse Android-Handler after removing callbacks
How to reuse Android-Handler after removing callbacks
Does that help I have a service in which I'm using a handler for getting the time of mediaplayer every millisecond. , If you want to reuse the handler you have to do:
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038706
What's wrong with this solution of coin change problem?
What's wrong with this solution of coin change problem?
I hope this helps . At first glance, it looks like your solution will skip solutions if a coin higher than the remaining value is in a position before the i'th position in the array. Think about the case where n=5 and c=[10,5]. The answer there shoul
TAG : java
Date : November 24 2020, 12:01 PM , By : depablobernat
Showing error while inserting User in room database
Showing error while inserting User in room database
I think the issue was by ths following , I am making an app where I am using room as a database cache and fetching data from the server using retrofit2 and saving it in room database but after fetching from server data is unable to insert in room dat
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038640
Feign : file upload configuration
Feign : file upload configuration
Hope this helps I found a solution to upload a file with Feign but my configuration creates another problem. I have several Feign clients for differents services used from a client sevice. , Problem fixed.
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038638
How to differentiate row name by column heading, if there are multiple rows available
How to differentiate row name by column heading, if there are multiple rows available
To fix the issue you can do You can define a variable that counts the rows of resultSet (0 based) before the while loop:
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038609
Change behavior without modifying base class
Change behavior without modifying base class
Does that help You could define B which would extend the interface that A implemented and have A (or better, the interface type) as a field.
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038604
Why I have Permission denied on a file located in /data/user_de/
Why I have Permission denied on a file located in /data/user_de/
this one helps. I want to get the attached content of MMS like Image or Video/audio. First I make this , So i change my code after the comment of CommonsWare to this :
TAG : java
Date : November 24 2020, 12:01 PM , By : Ruby
Calculate date range and return true
Calculate date range and return true
This might help you Yes you are in right approach, no need of any if block just in one statement return true if duration days greater than 45 or else false. You can also refactor this method to accept the number of days
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038588
How to draw multiple points on imageview in android java
How to draw multiple points on imageview in android java
it should still fix some issue I solved my problem by changing some lines of code, I declare those variables on the top and I create objects after setContentView:
TAG : java
Date : November 24 2020, 12:01 PM , By : user3038582

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