JAVA QUESTIONS

should help you out I want to do an auto refresh of JavaFX WebView. Can you help me with that? Estimated needs to be refreshed every 10 seconds , You can use a Timeline to reload the page every 10 seconds:

TAG : java

Date : January 02 2021, 06:48 AM , By : user179938

How can I get the current database in a Java class

Hope that helps It seems you've got things upside down and backwards. From the java language perspective, there is never any such thing as a "current database" tightly associated with (i.e. as a property of) a given java class.Java classes are just s

TAG : java

Date : January 02 2021, 06:48 AM , By : Anna

Do I need a custom Spliterator to avoid extra .stream() call?

Hope that helps You can work with a reducing identity to sort that out possibly. One way could be to update the implementation of mergeWith as :

TAG : java

Date : January 02 2021, 06:48 AM , By : ffmmjj

How to set Content type progammatically? Getting org.jvnet.mimepull.MIMEParsingException: Missing start boundary

like below fixes the issue Setting the request params is not the correct way to send a multipart request. Just setting the content-type with a boundary is not enough. That boundary is actually used inside the body of the request to separate different

TAG : java

Date : January 02 2021, 06:48 AM , By : omaidog

Why can't I use (String arg, arg2) instead of (String arg, String arg2) for my method?

help you fix your problem You just can't. That's how the language was designed.A choice was made that method signatures should work in the way they do. It could have been designed differently to support this (for example, golang does).

TAG : java

Date : January 02 2021, 06:48 AM , By : Ir0nh1de

JavaFX Canvas draw always in the same location

help you fix your problem This is the best I could get to make the plane move, You have to change some parameters to suit your application. What I am moving here is the canvas.

TAG : java

Date : January 02 2021, 06:48 AM , By : noboruwatanabe

Error on pi value using the Gregory-Leibniz with thread parameter

To fix the issue you can do Assuming you are trying to calculate the formula:

TAG : java

Date : January 02 2021, 06:48 AM , By : Chris Hubbard

Removing object from Arraylist on basis of sorting

seems to work fine I have a list having 4 objects and each object has 4 attributes. I want to remove the object having the greatest 4th attribute. , You can simplify this by doing

TAG : java

Date : January 02 2021, 06:48 AM , By : jbcrail

Incrementing an array 'b' after receiving input of array 'a'

help you fix your problem This loop modifies all the non-negative elements of the array a: x determines if a[i] is even (0) or odd (1) b[x]++ increments the counter of even (0) or odd (1) elements if a[i] is the n'th even number, it is assigned the n

TAG : java

Date : January 02 2021, 06:48 AM , By : Icyflash

Why removeif() not available on streams of collection

fixed the issue. Will look into that further to remove a element from a stream you can use Stream::filter. Example:

TAG : java

Date : January 02 2021, 06:48 AM , By : dormsbee

How to get data inside a Throwable Scala object?

I hope this helps . How I get information inside a Throwable Scala object? , Consider converting JsResultException.errors which is

TAG : java

Date : January 02 2021, 06:48 AM , By : Anthony Eden

Count how many palindromes in a string

it helps some times Here are some things you can think about when optimizing this algorithm:

TAG : java

Date : January 02 2021, 06:48 AM , By : Kiltec

How can I get the elements of a 2-D List in Java? For example, List<List<Integer>>

will be helpful for those in need How can I find the elements of a 2-D List in Java? , If you take like

TAG : java

Date : January 02 2021, 06:48 AM , By : niel

Problem setting up replicator for Couchbase lite 2.x and sync gateway

wish help you to fix your issue @Jay has the answer, in his comment. Replicator replicator is a local variable. As soon as the Activity is stopped, the replicator is eligible for garbage collection. That appears to the peer as if the host was stoppin

TAG : java

Date : January 02 2021, 06:48 AM , By : Puneet Madaan

How to read, update,insert, delete objects to a txt file in Java

will help you I am creating a command line interface representing a bookeeping system. I need to use .txt files as an external database.Each book keeping building should be mapped to a list of all the books stored at that location. I want to be able

TAG : java

Date : January 02 2021, 06:48 AM , By : rajiv

How do I read from BufferedReader real-time from a process output in Java?

Does that help This is just the concept to demonstrate the issue. You have to customize it and handle exceptions.

TAG : java

Date : January 02 2021, 06:48 AM , By : Jarques

JSON Array request cannot be applied error about constructor

hope this fix your issue Looks like it's complaining about mismatched arguments in JsonArrayRequest(). Try removing the POST method and JSONArray arguments and pass the url String as the first parameter:

TAG : java

Date : January 02 2021, 06:48 AM , By : sadboy

How to make changes on final classes?

wish of those help The reasonable approach would be to implement your own class that implements In_TableMake.In order to "minimize" your efforts, you probably use composition instead of inheritance. In other words, your class implementing that interf

TAG : java

Date : January 02 2021, 06:48 AM , By : Manu

Who calls the equals method of the class while putting the elements into the HashMap?

should help you out I am new to Java (very new). I am trying to understand HashMap and the equals method of a class and how it overrides the duplicates. Please see following code: , It should call equals for every put line .... correct ?

TAG : java

Date : January 02 2021, 06:48 AM , By : user183345

Rest API getting POST request instead of GET

wish help you to fix your issue I am new to the spring boot rest API and but I am stuck that when POST request comes for any implemented GET API then what Exception class and error code need to be returned in the response. Any help is appreciated , Q

TAG : java

Date : January 02 2021, 06:48 AM , By : FarmerDave

Out of bounds exception in double dimensional array

fixed the issue. Will look into that further The exact cause of your error is that your 2D array is actually a jagged array, meaning that not every row contains the same number of elements. In fact, the second row only contains three elements, so whe

TAG : java

Date : January 02 2021, 06:48 AM , By : k19k

System.arraycopy performance

this one helps. The key words in the sentence there are "as if". It doesn't actually use a temporary array. The description is simply saying that it works as if there was one (in other words, it doesn't overwrite things it should not).You might like

TAG : java

Date : January 02 2021, 06:48 AM , By : user94076

Hibernate inheritance - OneToMany with 2 class that extend parent not work

this will help I have 3 Entities: , Use @MappedSuperclass on your base class Beneficiary

TAG : java

Date : January 02 2021, 06:48 AM , By : Aki Björklund

Passing Reference changing the code in java

wish help you to fix your issue This is because the reference passed to the method actually refers to the same object as the one referred in your main method.For more : https://stackoverflow.com/a/4893009/6671004

TAG : java

Date : January 02 2021, 06:48 AM , By : arcadian

How to perform a fast join in BigQuery with Apache BEAM

like below fixes the issue TTBOMK you don't want to write full SQL in code, for instance WHERE clauses. Beam or really any code based SQL joins will fail on substantial data that is kept in BQ. So any such "enrichment" should really be done by the un

TAG : java

Date : January 02 2021, 06:48 AM , By : Simone

Switch String with Enum variables

This might help you I have got an Enum with different values and want to switch a string variable. Now I hit a wall trying to convert the Enum values to Strings, that I can use as case constant. , You can do this :

TAG : java

Date : January 02 2021, 06:48 AM , By : lietkynes

How to set up multilingual text to speech

Hope that helps You can identify the language of a text with Android ML KitAdd the dependencies for the ML Kit Android libraries to your module (app-level) Gradle file (usually app/build.gradle):

TAG : java

Date : January 02 2021, 06:48 AM , By : Milander

JAVA Program to find largest prime-factor, but the output is wrong?

To fix this issue There seems to be an error in your for loop. I've created a method for this using java 8. try below code,Java 8

TAG : java

Date : January 02 2021, 06:48 AM , By : Tetting

What does this "R" mean in the Java debugger?

With these it helps It is the output of the toString method of the Request class. It is not a Java thing, it is just something the developer put there. It might mean "request".

TAG : java

Date : January 02 2021, 06:48 AM , By : 03B

I have an internal class of KeyListener that is returning an error saying "is not abstract and does not override ab

I wish this help you Like mentioned in the comments the error means that you have to implement all the methods from the interface KeyListener. It has three methods keyTyped (that you already implemented) keyPressed (not implemented) KeyReleased (not

TAG : java

Date : January 02 2021, 06:48 AM , By : Si Gardner

Java regex to extract and replace by value

may help you . An alternative may be using a third-party lib such as Apache Commons Text. They have StringSubstitutor class looks very promising.

TAG : java

Date : January 02 2021, 06:48 AM , By : Vodkat

ConcurrentModificationException during iteration through collection

Any of those help When I set my batch config to use a single thread it works fine.

TAG : java

Date : January 02 2021, 06:48 AM , By : JoeCh

How to add Duplicate elements in Set?

Any of those help As community has pointed out in the comments, a Set is not meant to store duplicate values. But for reasons like "interview question" or "library code that you can't change", you can force it to store duplicates by overriding equals

TAG : java

Date : January 02 2021, 06:48 AM , By : PPD

Spring Boot 2 not picking up OS environment variables

Any of those help Those environment variables don't look quite right. I think Spring would be expecting them to be something like

TAG : java

Date : January 02 2021, 06:48 AM , By : richardD

How to set a deadline in Java without hardcoding the values

Does that help I need to set up a program that compares the date of creation of a date object(say date object 1), with another a future date or date object(say date object 2) that represents the deadline. For example, if i create an initial datetime

TAG : java

Date : January 02 2021, 06:48 AM , By : dnyaneshwar

How to change a variable for each run in my java program

hop of those help? Instead of using an array of booleans to represent your seating chart, perhaps you could use an array of strings. If the seat is empty, you leave that string as null. If the seat is full, you set the string at that index equal to t

TAG : java

Date : January 02 2021, 06:48 AM , By : Shane

Configuring akka dispatcher for large amount of concurrent graphs

hope this fix your issue Akka and Akka Streams is based on async, an actor or stream only uses a thread for a chunk of processing and then hands the thread back to the threadpool, this is nice because you can size the threadpool according the number

TAG : java

Date : January 02 2021, 06:48 AM , By : Felix Almeida

Execute all statements within try/catch

Hope this helps You could write a function that executes a set of invocations and that doesn't stop even if an exception is thrown :

TAG : java

Date : January 02 2021, 06:48 AM , By : 03B

How to logout specific User in Spring ? Programatically

wish help you to fix your issue So i have application where users can log in via social networks or normal login. I want to be able to log into admin account and BAN a user, When i change status of user to Banned, I want to log him out via code! How

TAG : java

Date : January 02 2021, 06:48 AM , By : somebody

Does the return keyword in a superclass method return to the subclass that called the superclass method?

I think the issue was by ths following , There's nothing special about the method call from the subclass to the superclass (other than which method gets called, which the super keyword influences, obviously). The answers to your questions flow from t

TAG : java

Date : January 02 2021, 06:48 AM , By : Gianluca Riccardi

ARJUNA012140: Adding multiple last resources is disallowed

seems to work fine Annotations use dynamic proxies under the cover and so don't work on private methods nor on public ones called internally (on this). You have to declare your two methods in different EJBs.Otherwise regarding your error, The system

TAG : java

Date : January 02 2021, 06:48 AM , By : Kilimanjaro

Calling super method from outside the child class

Does that help No. The super method can only be called as the first statement inside a constructor.

TAG : java

Date : January 02 2021, 06:48 AM , By : lili

how to initialize Matrix object

it fixes the issue I create a class called MATRIX which has one attribute , Considering your basic example,

TAG : java

Date : January 02 2021, 06:48 AM , By : Ashley

My if statement with a negation does not work

will help you My code executes properly only when it is not placed within the if statement. Why is that happening? I think there has to be something wrong with the condition which is supposed to check if Strings which are coming from JTextFields aren

TAG : java

Date : January 02 2021, 06:48 AM , By : Josh

Java List - Best way to insert or replace

it fixes the issue So I was wondering what would be the best way to , If you want uniqe element use Set insted of list

TAG : java

Date : January 02 2021, 06:48 AM , By : Ryan Adriano

Spring DI having two constructors at the same time

hop of those help? On top of above answers, if there is single constructor declared without @autowire, spring uses same constructor for injection.If there multiple constructors, then Spring uses constructor which is @autowired.

TAG : java

Date : January 02 2021, 06:48 AM , By : cameron

What is the right way to define constants when there is a huge number of constants?

will help you When using a database isn't possible, then a well maintained XLS sheet might be the next best option. Together with a well tested process of fetching the sheet data, to either generate code from it, or to be used as some kind of propert

TAG : java

Date : January 02 2021, 06:48 AM , By : Paul McKee

How to tell compiler to use openjdk 11 via pom.xml

around this issue The problem is probably in the version of Java you're using to run Maven. See the discussion here: Unable to compile simple Java 10 / Java 11 project with Maven

TAG : java

Date : January 02 2021, 06:48 AM , By : bikefixxer

Determine that a date is before or behind an age

hope this fix your issue Apparently in a simple problem but I am being complicated with the treatment of dates. I need a date comparator that receives as parameters a date in yyyy-MM-dd format and a number (age) and that determines if it is above tha

TAG : java

Date : January 02 2021, 06:48 AM , By : PsyberMonkey

Exception trying convert UUID attribute (foreign key) to Entity object (SOLVED)

seems to work fine Try to use UUID type instead of String for 'id' fields, because UUID is a binary format, not character based, so databases use special type for UUID fields.

TAG : java

Date : January 02 2021, 06:48 AM , By : flesk

I need to put 41.32 trillion in a variable on Java, but the long data type is only limited to 4 trillion

Hope this helps Just as a general idea, if you are in the trillions you should probably choose different units :DTake a look at the BigInteger class. Example usage:

TAG : java

Date : January 02 2021, 06:48 AM , By : Rit Li

Return a set of all of the words in the word list that can be made with subset of input characters

Hope this helps I am working on below problem but not able to figure out how to approach this problem in Java? , Here's one of possible approaches:

TAG : java

Date : January 02 2021, 06:48 AM , By : bjorngylling

how can i still get this problem after i mention the service in the manifest

This might help you It's declared as a service. You are probably calling this with startActivity(new Intent(this, Service.class). Since there's no activity declared as that class hence the error.

TAG : java

Date : January 02 2021, 06:48 AM , By : Fahad

Continue the flow after throwing exception

I wish did fix the issue. Typically once you throw an exception, you are saying that the current line of execution should terminate, rather than continue. If you want to keep executing code, then maybe hold off on throwing an exception.

TAG : java

Date : January 02 2021, 06:48 AM , By : nemof

Wait for executor for it's threads to finish by executor submit

will help you executor.submit returns Future object, Future has many utility methods like isDone(), get() etc..!!https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Future.html

TAG : java

Date : January 02 2021, 06:48 AM , By : Tony Siu

Calculate PI in Java. Wrong value

I wish this helpful for you Each instance of GregoryLeibnizImpl needs to be operating independently. Or you need a mutex. Or both.

TAG : java

Date : January 02 2021, 06:48 AM , By : aspitzer

JavaFX Wombo Combo-displaying the text depending on the choice from the drop-down list

wish helps you The only thing missing is the piece of code that "reacts" to changes of the value properties of those two combo boxes. Try adding this:

TAG : java

Date : January 02 2021, 06:48 AM , By : Tetting

Print count of each word in a list in alphabetical order

seems to work fine Order is not guaranteed in a HashSet by design. From the docs:

TAG : java

Date : January 02 2021, 06:48 AM , By : Raghaw

How do i get an element from List<T> elements= new ArrayList<>();?

To fix this issue I want to get the elements from the list. I'm working right now on a project, next to the Class name is: written. , You cannot declare

TAG : java

Date : January 02 2021, 06:48 AM , By : ack

How to Map two List Of type String in third List of Object

Hope that helps I want to convert two List of String type into List of Person , You could do:

TAG : java

Date : January 02 2021, 06:48 AM , By : Gerhard Miller