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JAVA QUESTIONS

JavaFx WebView auto refresh?
JavaFx WebView auto refresh?
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
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?
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
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?
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
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
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
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'
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
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?
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
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>>
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
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
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?
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
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?
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?
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
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
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
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
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
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
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
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
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?
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?
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 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
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
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?
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
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
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
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
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
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
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?
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
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
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
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
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
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
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?
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
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
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)
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
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
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
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
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
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
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
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
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<>();?
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
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

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