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JAVA QUESTIONS

Java - Loop to average rgb values should be breaking things....but isn't
Java - Loop to average rgb values should be breaking things....but isn't
I think the issue was by ths following , I think you can solve your problem by summing the reds/greens/blues and then dividing them by the total pixels at the end to find the average:
TAG : java
Date : November 13 2020, 04:01 AM , By : Wadia Snoussi
ejbCreate() method of MDB not called at the application startup on Websphere Application Server
ejbCreate() method of MDB not called at the application startup on Websphere Application Server
should help you out Edited my response to be more correct and highlight the information Tracy mentioned:By default, the EJBContainer defers initializing beans until they are first called. Furthermore, ejbCreate() is called each time a new bean is cre
TAG : java
Date : November 13 2020, 04:01 AM , By : Marilou Trinidad
Return bounded type is incompatible with a type that matches the bound
Return bounded type is incompatible with a type that matches the bound
Hope that helps You've created a generic method by declaring T as a type parameter with an upper bound. With generic methods, you must be aware that the caller can decide what T is by passing an explicit type argument to your method.
TAG : java
Date : November 13 2020, 04:01 AM , By : Adana Merdin
Generic database return function using MSSQL
Generic database return function using MSSQL
I hope this helps you . passing queries sounds like your system is rife for SQL injection attacks. You should rarely query based on an sql statement; usually it's an sql statement with question marks in it, + all the argument passed separately, using
TAG : java
Date : November 13 2020, 04:01 AM , By : user2182366
Is there any reason to create an array for only 1 element?
Is there any reason to create an array for only 1 element?
I wish this helpful for you I just found this code snippet and was wondering if there is any specific reason why the value is stored in a double1 array instead of just a "normal" double variable? , Is there any reason to create an array for only 1 el
TAG : java
Date : November 13 2020, 04:01 AM , By : user2182350
Index out of bounds Java merge sort?
Index out of bounds Java merge sort?
hop of those help? Indexes run from 0, this means when list1.length = 5 then the index can be 0 through 4 change
TAG : java
Date : November 13 2020, 04:01 AM , By : user2182347
Search on text file via multiple variables
Search on text file via multiple variables
this will help Assuming what you want to check for all items in search1, you could create a function that does the check using a for loop:
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182286
Downgrade java version in Eclipse
Downgrade java version in Eclipse
this will help Check Use '--release' option, which is exactly for this case.See:
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182283
How can i use a RestControler function in another RestControler
How can i use a RestControler function in another RestControler
Does that help You should not be calling your controllers from one another.Two solutions:
TAG : java
Date : November 12 2020, 04:01 AM , By : deplast
Integrate another api's return data to service method
Integrate another api's return data to service method
Any of those help why don't you try to create a new data base to save image urls and from creating a service get those image urls to your front end( seems you want to bind data to front end) so from front end bind the value to the image url. will be
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182265
Insert method for custom linked list implementation?
Insert method for custom linked list implementation?
I think the issue was by ths following , You can always test your code by running it on some test cases. But here are my comments to this code: the last if-statement if (current != null) will always return false, because the while loop before that wi
TAG : java
Date : November 12 2020, 04:01 AM , By : Long Hao
How to deserialize instance of java.lang.String out of START_OBJECT token
How to deserialize instance of java.lang.String out of START_OBJECT token
fixed the issue. Will look into that further I have a json: , In your request object you have an array of data.
TAG : java
Date : November 12 2020, 04:01 AM , By : muralid
Firebase, get an arraylist field from all documents
Firebase, get an arraylist field from all documents
This might help you To get the array from within a single document, only these lines of code are required:
TAG : java
Date : November 12 2020, 04:01 AM , By : Wacco
spring boot jpa - Error creating bean with name 'entityManagerFactory' defined
spring boot jpa - Error creating bean with name 'entityManagerFactory' defined
I hope this helps you . I am working on an application with spring data jpa, mysql and maven but just received an error. I am trying to figure it out but making no progress. I am using IntelliJ CE which doesn't naturally support spring boot project s
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182169
Unexpected behaviour when doing bitwise operations halving bitset space
Unexpected behaviour when doing bitwise operations halving bitset space
hope this fix your issue This is because 1
TAG : java
Date : November 12 2020, 04:01 AM , By : TomViolence
Does .remove on a document object result in a null?
Does .remove on a document object result in a null?
Hope that helps In my java webagent I create a Document object. For example NotesDocument document = ...; later I use remove on this object: , You already created a reference in the memory here.
TAG : java
Date : November 12 2020, 04:01 AM , By : d3vvv
Spark Framework cookies always null
Spark Framework cookies always null
This might help you I finally found the problem after hours of research. It wasn't a problem of Spark itself. In my application I make the request with axios. Axios apparently works like Ajax or uses it. Therefor I need to add the following to my Axi
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182112
Apache Flink: Custom trigger behaves unexpectedly
Apache Flink: Custom trigger behaves unexpectedly
I wish this help you Are you sure you want to key the stream by event.lunum? That makes sense if you are expecting roughly 200 events for each distinct value of lunum. But if you only have one event per batch for each value of lunum, that would expla
TAG : java
Date : November 12 2020, 04:01 AM , By : user2182103
IntelliJ unit tests don't see changes
IntelliJ unit tests don't see changes
around this issue After reading the comments I realized that I cant even make a "Build", that was the real issue. I got all sorts of package and symbol not found errors. I tried to "Invalidate caches restart" on Intellij but didnt help. So I deleted
TAG : java
Date : November 12 2020, 04:01 AM , By : Scott Man
Did I break Java's local variable type inference?
Did I break Java's local variable type inference?
To fix this issue You haven't broken anything. You can't assign null directly, but it's perfectly fine to assign it indirectly via a method call.The reason for this is that by just assigning null the compiler has no information to know what type you
TAG : java
Date : November 12 2020, 04:01 AM , By : user2181992
Initialization of OSGi prototype components
Initialization of OSGi prototype components
it should still fix some issue The consumer of a service does not know anything about the implementing component... or indeed whether the service is implemented by a component at all, versus something more low-level. Therefore it cannot dictate the c
TAG : java
Date : November 11 2020, 04:01 AM , By : Tomáš Flekač
Is there a need to close resource if we use try-with-resource
Is there a need to close resource if we use try-with-resource
I hope this helps you . You don't have to close resources that you defined in the try clause. But, given your example, you also have this in the body of the try:
TAG : java
Date : November 11 2020, 04:01 AM , By : Mahmut Cemal Yiğit
Java Calculator - Shunting yard
Java Calculator - Shunting yard
I think the issue was by ths following , As @BillTheLizard suggested in the comments of this question, the recursion was fine, the problem was with my Shunting yard algorithem. The UML of the code said to replace two operators only if one has precede
TAG : java
Date : November 11 2020, 04:01 AM , By : user2181727
Project Reactor: doOnNext (or the others doOnXXX) async
Project Reactor: doOnNext (or the others doOnXXX) async
This might help you If you're absolutely sure you don't care wether or not the email sending succeeds, then you could use "subscribe-inside-doOnNext" but I'm pretty confident that would be a mistake.In order to have your Flux propagate an onError sig
TAG : java
Date : November 11 2020, 04:01 AM , By : Emrah Dinçer
Tomcat undeploys WARs automatically after some time
Tomcat undeploys WARs automatically after some time
I wish this helpful for you The server on which Tomcat is running lost the connection to the P: drive momentarily. That triggered both the failure to check the tomcat-users.xml file and the undeloyment of the web applications. You need to move the we
TAG : java
Date : November 11 2020, 04:01 AM , By : Jolui
Is there any method to put multiple error types into one objects by @ExceptionHandler
Is there any method to put multiple error types into one objects by @ExceptionHandler
this one helps. You could implement a custom Validator (https://docs.spring.io/spring/docs/4.1.x/spring-framework-reference/html/validation.html) and in the validate method reject the values.After that you can implement a ExceptionHandler(extends Res
TAG : java
Date : November 11 2020, 04:01 AM , By : Manikanda Kumar
How to implement press back twice to exit to ALL activities
How to implement press back twice to exit to ALL activities
it helps some times You can make your own custom Activity that extends AppCompatActivity and put your implementation in there and then let each of your other activities extend that custom Activity instead of AppCompatActivity. this is not multiple in
TAG : java
Date : November 11 2020, 04:01 AM , By : user2181690
Add a listener to object property javafx
Add a listener to object property javafx
I hope this helps . You're missing the dependency in the Bindings.createObjectBinding() call.You need to use
TAG : java
Date : November 11 2020, 04:01 AM , By : Alexander Sluch
JavaFX - Editing TableView doesn't update model property
JavaFX - Editing TableView doesn't update model property
around this issue You return the property from the cellValueFactory. Assuming you do not specify a onEditCommit event handler for the the column, the SimpleStringProperty object is modified. The setter method of the class containing the field is not
TAG : java
Date : November 11 2020, 04:01 AM , By : Gautam Chaudhary
How to write a test case of custom save method of an interface
How to write a test case of custom save method of an interface
should help you out To test the behavior of the generated class of this interface by Spring you need first of the Spring container.Then if you want to write an unit test (and not a full integration test), you need to use an embedded DB (H2 for exampl
TAG : java
Date : November 11 2020, 04:01 AM , By : Brad
JAVA - Finding a similar word in String ArrayList
JAVA - Finding a similar word in String ArrayList
this one helps. I'm working for a school project. Purpose of the program looking for the "Same" and "similar" words via input. I don't know how to find similar words numbers or just words. , You can do so easily using java-8 :
TAG : java
Date : November 11 2020, 04:01 AM , By : frobinrobin
Where does Squirrel SQL store its auto correct entries?
Where does Squirrel SQL store its auto correct entries?
may help you . I found it--after digging through the class files, I found the file they referred to an xml stored at .squirrel-sql\plugins\syntax\autocorrectdata.xmlThat saves a ton of time. Now I can type a table name and it will auto-populate the t
TAG : java
Date : November 10 2020, 04:01 AM , By : user2181601
simple smack jabber program taking very long to connect on android
simple smack jabber program taking very long to connect on android
wish helps you I found the problem. SMACK jabber uses minidns and minidns has a recently fixed bug on android 8. I solved the problem by using the code below. to @Flow
TAG : java
Date : November 10 2020, 04:01 AM , By : user2181585
Understanding multiple recursion
Understanding multiple recursion
help you fix your problem Recursion is when a method or function calls itself.Multiple Recursion is when a method or function contains multiple self-references. This is when it gets a bit tricky. Lets take a look at your example.
TAG : java
Date : November 10 2020, 04:01 AM , By : Toosh Ahmed
java.lang.String: length() vs. count?
java.lang.String: length() vs. count?
it fixes the issue String implementation contains an array of chars - value. So count field in some implementations is used for calculation of the array's declared size.One could notice that the count value provided differs the given String length tw
TAG : java
Date : November 10 2020, 04:01 AM , By : Graphicz
how @bean and @Autowired actually works?
how @bean and @Autowired actually works?
will help you Look at this URL https://spring.io/guides/topicals/spring-security-architecture/ It seems that you Autowire AuthenticationManagerBuilder auth as a @Bean here.Configure(AuthenticationManagerBuilder auth) so it will work in this case and
TAG : java
Date : November 10 2020, 04:01 AM , By : Picou_graphisme
What is the shortest, best, cleanest way to set a private field via Reflection in Java?
What is the shortest, best, cleanest way to set a private field via Reflection in Java?
it helps some times Hi I've already worked with Reflection in Java. But if you are using the java standards (e.g. injecting a private field) you have to write a lot of code to get the job done. , The "One-Liner"
TAG : java
Date : November 10 2020, 04:01 AM , By : Saurabh Sabharwal
Spring data @Transient in abstract class
Spring data @Transient in abstract class
hope this fix your issue Your code looks good to me.Are you sure that you are using the correct @Transient annotation? It must be imported from the package org.springframework.data.annotation. Don't use the javax persistence one.
TAG : java
Date : November 10 2020, 04:01 AM , By : PYves
Sorting an array alphabetically in java
Sorting an array alphabetically in java
will help you In my program, I am reading data from a CSV file which follows the pattern of dance group and then the dancers in the group. I am struggling to sort the dancers names alphabetically. , Marius, see whether below code works as you intende
TAG : java
Date : November 10 2020, 04:01 AM , By : D-Quong
How to Generate LinkedHashMap in the form of table that has been generated dynamically using itext7
How to Generate LinkedHashMap in the form of table that has been generated dynamically using itext7
Does that help Finally, here is the output that I searched. for your support everyone :)
TAG : java
Date : November 10 2020, 04:01 AM , By : Amr
How to choose overloaded method by argument type?
How to choose overloaded method by argument type?
I wish did fix the issue. Method overloading resolution is performed at compile time, when only the compile-time type is known. Therefore, the compile-time type of the parameters passed to the method call determine which of the overloaded methods is
TAG : java
Date : November 10 2020, 04:01 AM , By : Brian Moseti
What is the reason behind null checks in method reference expression evaluation?
What is the reason behind null checks in method reference expression evaluation?
I hope this helps you . The reason here is the fact that when you are creating non static method reference, it must have access to this. When you are trying to create reference to null object, there is no this anywhere, that is why it should fail on
TAG : java
Date : November 10 2020, 04:01 AM , By : user2181430
Uploading profile image and proceeding to next
Uploading profile image and proceeding to next
With these it helps I have two activities. SetupActivity.java and ProfileImageActivity.java. , In your code, you have
TAG : java
Date : November 10 2020, 04:01 AM , By : user2181416
Java is said to ignore extra whitespace. Why does c=a++ + ++b not compile without the spaces?
Java is said to ignore extra whitespace. Why does c=a++ + ++b not compile without the spaces?
Hope this helps Java Language Specification section 3.2, "Lexical Translations", says (emphasis mine):
TAG : java
Date : November 10 2020, 04:01 AM , By : Titan Nguyen
Read properties file from jar
Read properties file from jar
should help you out So I found the solution.I use this method to get the file's InputStream what is in your application's jar:
TAG : java
Date : November 10 2020, 04:01 AM , By : Shaun_K
Algorithm optimization on arrays
Algorithm optimization on arrays
wish helps you This is a simple solution to what you are trying to do see if it works out for you :)
TAG : java
Date : November 10 2020, 04:01 AM , By : user2181315
JPA @Query with Entity like parameter
JPA @Query with Entity like parameter
Hope that helps I am using a @Query with JPA in my Repository. But, when I execute a program which uses this @Query, I am getting this error : , You need to provide alias for entity as below:
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181257
Prevent DataNucleus transactions on every read
Prevent DataNucleus transactions on every read
This might help you I think I have found what is the case.DataNucleus runs all queries in transactions except queries which have TransactionIsolation.NONE even if a transaction is not created. Any connection for a non-transaction query will be switch
TAG : java
Date : November 09 2020, 04:01 AM , By : liwei
Thymeleaf - passing models in JAVA
Thymeleaf - passing models in JAVA
wish helps you I recommend you not use the raw types but rather List or similar.To iterate the List in Thymeleaf template, please see the Baeldung's webpage where is this issue properly explained.
TAG : java
Date : November 09 2020, 04:01 AM , By : Jarvis Kim
JRE 8u192 - javax.security.auth.login.FailedLoginException: Cannot bind to LDAP server
JRE 8u192 - javax.security.auth.login.FailedLoginException: Cannot bind to LDAP server
I wish this helpful for you There has been a change in Java 8 update 181 and later with the default settings in JNDI when a client connects to a server using SSL. If the server's certificate hostname doesn't match the host that the client connected t
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181138
Can I have two parallel receive task in Camunda?
Can I have two parallel receive task in Camunda?
This might help you That depends on what message you are waiting for. If you wait in each task for a different message there should be no problem and you can model several receive tasks behind a parallel gateway. But if all the tasks are waiting for
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181099
How to get Java version of any given java path programmatically?
How to get Java version of any given java path programmatically?
Any of those help Okay after reading your comments I have wrote code that executes java -version
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181088
Is there a way to pass data from one servlet to another whilst also passing the same data to a jsp?
Is there a way to pass data from one servlet to another whilst also passing the same data to a jsp?
it fixes the issue In my scenario I have a servlet that passes an object to a JSP in the usual requestDispatcher way, however I also need this object for use in another servlet. Is there a method of passing this object to both the JSP to be displayed
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181081
How to parse JSON file without root element using GSON
How to parse JSON file without root element using GSON
it fixes the issue I've seen a lot of post about how to parse JSON files using Gson library, but they all use root elements in order to do the Serialization. So, in that case, you don't have the root element. , You have a List< Person > there. So thi
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181078
JDBC executeBatch behaviour inside a runnable task upon timeout
JDBC executeBatch behaviour inside a runnable task upon timeout
this will help future.get(timeout, timeUnit) will try to retrieve the future's result for the specified amount of time. If the future doesn't complete by the end of the timeout, get will throw an exception.But the underlying task will not be stopped.
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181052
How to solve an error about incompatible types?
How to solve an error about incompatible types?
hope this fix your issue The HSSFWorkbook class implements the Workbook interface.In POI 4.x, the Workbook interface implements AutoCloseable and Closeable.
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181050
Receiving exception when trying to run simple Kafka Stream App
Receiving exception when trying to run simple Kafka Stream App
I wish this help you you have conflicts between dependencies org.apache.kafka:kafka-streams and org.apache.kafka:kafka-clients. according to your exception, you use kafka-clients version less than 1.0.0, but kafka-streams version is equal or higher t
TAG : java
Date : November 09 2020, 04:01 AM , By : Jesus E Ramirez
Jdbc: What happens to running statements on application exit?
Jdbc: What happens to running statements on application exit?
I wish did fix the issue. A JDBC database Connection Object is just a cursor to a database connection that is owned and managed by the database.If the application exits without closing the connection properly, the database connection will be left unc
TAG : java
Date : November 09 2020, 04:01 AM , By : Sri Sowjanya
Parsing JSON in Java by the name of the key
Parsing JSON in Java by the name of the key
Does that help A solution I tried is using an intermediate class which maps more to the json structure:
TAG : java
Date : November 09 2020, 04:01 AM , By : user2181006
Find usages of lombok generated builder in eclipse
Find usages of lombok generated builder in eclipse
may help you . In the Outline view select User > UserBuilder > hasFlag() and click Ctrl+Shift+H (or right-click and choose References > ...).Java search should work too.
TAG : java
Date : November 09 2020, 04:01 AM , By : Aaron Lamb

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