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JAVA QUESTIONS

Copy and move a file from SFTP using Java config in Spring Integration
Copy and move a file from SFTP using Java config in Spring Integration
hop of those help? I am new to Spring integration. I've this requirement to first move a file from /files folder to /process folder in SFTP location and then copy that file to local. I am suggested to use gateway and configuration has to be in java u
TAG : java
Date : October 30 2020, 04:01 PM , By : Yang Pan
Read 10 files asynchronously in Spring Boot
Read 10 files asynchronously in Spring Boot
should help you out The code below shows me reading a file one at a time in a folder. I want to read 10 files at once, run through a METHOD_A and write to another folder. There are 5000 files in the folder. Reading the file 1 at a time is extremely s
TAG : java
Date : October 30 2020, 04:01 PM , By : acdaet
Microsoft JDBC driver ClassCastException thrown in Weblogic Datasource pool
Microsoft JDBC driver ClassCastException thrown in Weblogic Datasource pool
I wish did fix the issue. Datasource reset did the trick. However, the reason for the issue still remains a mystery. It's never occurred again since then.
TAG : java
Date : October 30 2020, 04:01 PM , By : sandove
Launching (whatsapp) mobile application via Appium causes an "'com.whatsapp.Main' never started" error
Launching (whatsapp) mobile application via Appium causes an "'com.whatsapp.Main' never started" error
I hope this helps you . If you are providing the app capability then there is not need to specify the capabilties appPackage and appActivityIncase you have pre-installed the application in our device then you can start the app with capabilties appPac
TAG : java
Date : October 30 2020, 04:01 PM , By : Shaun Murdoch
Unread block data while reading from Java Spark
Unread block data while reading from Java Spark
Hope that helps Finnally, I found the solution, it seems it was a problem with dependencies, specifically in the compressed jar:
TAG : java
Date : October 30 2020, 04:01 PM , By : Arnab Dutta
Error while creating multi release jar "entry: A.class, contains a class with internal name com.vipin.exp.A, names
Error while creating multi release jar "entry: A.class, contains a class with internal name com.vipin.exp.A, names
wish of those help My understanding of -C option was wrong, I should have given top level directory after -C.
TAG : java
Date : October 30 2020, 04:01 PM , By : Darshan gmurthy
(Java) Algorithm for GUI-based calculator
(Java) Algorithm for GUI-based calculator
I think the issue was by ths following , Another suggestion: if might be easier to create a calculator that parses and evaluates a string. There are plenty of examples on this on the net so this should be an interesting and not too hard task, especia
TAG : java
Date : October 30 2020, 04:01 PM , By : swathi
Files.walkFileTree leaking directory descriptors with custom FileVisitor
Files.walkFileTree leaking directory descriptors with custom FileVisitor
I think the issue was by ths following , From the Fileslist() documentation:
TAG : java
Date : October 30 2020, 04:01 PM , By : Rashad Faizi
Autoclosable, File resource in Groovy
Autoclosable, File resource in Groovy
I think the issue was by ths following , The try-with-resource syntax in Java 7 is not directly supported in Groovy but the equivalent syntax uses withCloseable method (also with similar methods for streams and readers) and a closure block of code. R
TAG : java
Date : October 30 2020, 04:01 PM , By : Aaronson
Receive message from server netty nio java
Receive message from server netty nio java
hope this fix your issue You used the StringEncoder to encode the incoming ByteBuf buffer,StringDecoder to decode the outgoing message. You may want to deal with it similar with bgTaskGroup.submit(new Sleeper(sleepMillis, ctx.channel())); in BGTaskSe
TAG : java
Date : October 30 2020, 04:01 PM , By : Fhercho Hermi
how to send List<model> by adding its parameter as object
how to send List<model> by adding its parameter as object
I think the issue was by ths following , You are adding the same object to the list three times. You have to create a new object every time by moving this line:
TAG : java
Date : October 30 2020, 04:01 PM , By : tamaex
Why javac accepts to compile classes with package declaration with incorrect tree structure
Why javac accepts to compile classes with package declaration with incorrect tree structure
I think the issue was by ths following , In principle, you don't need to put your source files in a tree that matches the package hierarchy. The compiler will compile each class and store the package name internally. Regardless of how you organize th
TAG : java
Date : October 30 2020, 04:01 PM , By : Zack Sales Zion
How to maintain Socket connection?
How to maintain Socket connection?
like below fixes the issue You will need to use a technology called WebSockets. It is built precisely for the use case you have at the moment. See https://www.baeldung.com/java-websockets for more information.
TAG : java
Date : October 29 2020, 04:01 PM , By : user2171702
Is there another way to get the text from an element if it has no attribute and getText() returns a blank string?
Is there another way to get the text from an element if it has no attribute and getText() returns a blank string?
hope this fix your issue You can try WebElement.getAttribute("value") or you can also try the innerText attribute that will return the text content of an element.
TAG : java
Date : October 29 2020, 04:01 PM , By : cenu sreenu
My application crashes when getting uri from user
My application crashes when getting uri from user
hop of those help? You have to override on Activity Result in your activity. DO NOT use the same intent like you have done. You have to use the Intent returned in onActivityResult method. So your code should be:This should be your method to Pick an A
TAG : java
Date : October 29 2020, 04:01 PM , By : Dai Nguyen
BottomSheetBehavior not draggable if i do not set peekHeight
BottomSheetBehavior not draggable if i do not set peekHeight
Any of those help By default, BottomSheetBehavior is not hideable.You have to explicitly tell, that you want that behavior to be hideable:
TAG : java
Date : October 29 2020, 04:01 PM , By : kylin
How do I find if the array have any two elements (i+j) which is equal to my given key?
How do I find if the array have any two elements (i+j) which is equal to my given key?
wish helps you Your else-clause is wrong. It always returns false if the first pair hasn't the same value.Change your code like this:
TAG : java
Date : October 29 2020, 04:01 PM , By : Harish Gwalani
Autowired does not work in AbstractHttpMessageConverter
Autowired does not work in AbstractHttpMessageConverter
hop of those help? As I see from your code, the converter class you have written is not considered a bean in spring application context. This is because the list itself that is defined in you application configuration class is a bean, but no so the e
TAG : java
Date : October 29 2020, 04:01 PM , By : Ny Huskatalog
Managing hotfixes with Flyway
Managing hotfixes with Flyway
I hope this helps . The Flyway FAQ covers this under What is the best strategy for dealing with hot fixes? However it uses x.y version numbers which you wish to avoid. An alternative to this is to multiply the version numbers by 10 or 100 and use the
TAG : java
Date : October 29 2020, 04:01 PM , By : Daniel Hobbs
Exception in thread "main" java.lang.NoClassDefFoundError: when running with console. Possibly Maven-related
Exception in thread "main" java.lang.NoClassDefFoundError: when running with console. Possibly Maven-related
it should still fix some issue That's because java doesn't know where to take this libs from. Few options:
TAG : java
Date : October 29 2020, 04:01 PM , By : ShawnW
JavaFX retrieve TextView value outside Controller
JavaFX retrieve TextView value outside Controller
I wish did fix the issue. You shouldn't use fx components outside of you controller! You should always separate logic and ui. So just pass the text content to the method.
TAG : java
Date : October 29 2020, 04:01 PM , By : stackoverflowflame
sleep() method behavior in synchronize block
sleep() method behavior in synchronize block
this will help A synchronized method implicitly synchronizes on this. In your case the instance of ThreadRunnable.But each thread has its own instance so they use two different monitors.
TAG : java
Date : October 29 2020, 04:01 PM , By : Beginner
How to different objects into the same list using @XmlElements?
How to different objects into the same list using @XmlElements?
To fix this issue I want to use jackson xml mapper to map the following xml (that I have to control of and get from a webservice) to a java bean: , The solution was to make use of:
TAG : java
Date : October 29 2020, 04:01 PM , By : yuanfang lee
Rendering Parent child view causes StackOverflow exception
Rendering Parent child view causes StackOverflow exception
I hope this helps you . I can not render a nested parent child tree structure in jsp page. Due to stackover flow error which is caused by , Finally I solved it in this way:tree.jsp:
TAG : java
Date : October 29 2020, 04:01 PM , By : Santhi T
Kafka Consumer: can onPartitionsRevoked and onPartitionsAssigned callbacks be executed inside one poll() call?
Kafka Consumer: can onPartitionsRevoked and onPartitionsAssigned callbacks be executed inside one poll() call?
it fixes the issue In my opinion, they are called from on poll() call. When a consumer instance starts to join the group, onPartitionsRevoked is firstly invoked to revoke all the partitions assigned to this instance and sends the JoinGroup request. T
TAG : java
Date : October 29 2020, 04:01 PM , By : Malgorythm
Regex to catch all the words and the "i'm you're etc" in Java
Regex to catch all the words and the "i'm you're etc" in Java
With these it helps Your initial pattern was splitting at a word boundary enclosed with 0+ whitespaces pattern. The second pattern is matching substrings.Use it like this:
TAG : java
Date : October 29 2020, 04:01 PM , By : JayDee
Java testing with mockito: mock class object
Java testing with mockito: mock class object
To fix the issue you can do You have two choices here: make it possible for your test case to "manually" inject a (mocked) Sender object (for example by providing a constructor to set that field) make use of Mockitos @InjectMocks annotation
TAG : java
Date : October 29 2020, 04:01 PM , By : RAJNEESH PATWA
Install JDK with apt-get on ubuntu precise 64
Install JDK with apt-get on ubuntu precise 64
hope this fix your issue You can try to install java 8 manually. Just download java (tar.gz) from oracle site.Then, create directory for your jdk like (of course if folder doesn't exist)
TAG : java
Date : October 29 2020, 04:01 PM , By : Dinesh Seralathan
Is it possible (and wise) to execute other "spark-submit" inside a JavaRDD?
Is it possible (and wise) to execute other "spark-submit" inside a JavaRDD?
Hope this helps I'm trying to execute a Spark program with spark-submit (in particular GATK Spark tools, so the command is not spark-submit, but something similar): this program accept an only input, so I'm trying to write some Java code in order to
TAG : java
Date : October 29 2020, 04:01 PM , By : iastk
Spring rest controller @ExceptionHandler return xml content and json errors
Spring rest controller @ExceptionHandler return xml content and json errors
this will help I have managed to solve this by removing the produces from @RequestMapping and specifying with ResponseEntity the type I want to return
TAG : java
Date : October 29 2020, 04:01 PM , By : Louis Ndjock
Generic iterator for an interface and its subclasses and its types and subtypes
Generic iterator for an interface and its subclasses and its types and subtypes
will help you You're close. Your iterator BSTIterator must implement Iterator instead of Iterator. I think it is because the type of your returned iterator has to guarantee it is any Entry, not specifically BSTNode.
TAG : java
Date : October 29 2020, 04:01 PM , By : fariq
Check if a string is a substring of another string
Check if a string is a substring of another string
Does that help I read article with nice exercise about checking is string is a substring of another. , Try this: (Comments added for explanation)
TAG : java
Date : October 28 2020, 04:01 PM , By : user2171793
How to add consecutive numbers in a String
How to add consecutive numbers in a String
Hope this helps Your incrementation failed based on the last value. So keeping your logic :
TAG : java
Date : October 28 2020, 04:01 PM , By : Ashwini Kumar
what is import for browserActivityClient in webview?
what is import for browserActivityClient in webview?
Hope this helps I searched many time reason for my problem: when I run this code: , Add browserActivityClient class to your code .
TAG : java
Date : October 28 2020, 04:01 PM , By : jake
JAXB change the Element "name" of @XMLElements annotation
JAXB change the Element "name" of @XMLElements annotation
this will help My solution was to change the generator. First i readjust my pom like this:
TAG : java
Date : October 28 2020, 04:01 PM , By : Razeel Mohammed
Cordova isn't working with Java 9. How to set a specific jdk ONLY for Cordova?
Cordova isn't working with Java 9. How to set a specific jdk ONLY for Cordova?
wish helps you ... the reset of the JAVA_HOME environment variable to point to Java 8, but [that] has the side effect that all the other Java applications will run on Java 8.
TAG : java
Date : October 28 2020, 04:01 PM , By : harutora
Eclipse won't open in Linux Mint and Java won't open in different directories
Eclipse won't open in Linux Mint and Java won't open in different directories
this one helps. In the file eclipse.ini remove the line --add-modules=ALL-SYSTEM.In Java 9 the Java Platform Module System was introduced which encapsulate most internal APIs. The --add-modules=ALL-SYSTEM is a Java 9 virtual machine (VM) argument to
TAG : java
Date : October 28 2020, 04:01 PM , By : user7448980
Gradle removes directory defined as task output (stale directories)
Gradle removes directory defined as task output (stale directories)
I hope this helps you . I had the same issue, followed this approach and it worked for me, in your case it would be something like this:
TAG : java
Date : October 28 2020, 04:01 PM , By : Trainlevel2
Create customized Pattern for my data-set in mallet
Create customized Pattern for my data-set in mallet
around this issue Look for regular expression documentation to understand the meaning of each element of the pattern. The original pattern divides the whole line into three groups: all characters from the beginning to the first comma or whitespace, a
TAG : java
Date : October 28 2020, 04:01 PM , By : 2_1_2
Java MapStruct Collection Mapping
Java MapStruct Collection Mapping
wish helps you You can achieve this by using the new @Context from 1.2. and @AfterMapping
TAG : java
Date : October 28 2020, 04:01 PM , By : BO Piseth
Activiti - HistoricTaskInstanceQuery, search by property of variable which is JPA entity
Activiti - HistoricTaskInstanceQuery, search by property of variable which is JPA entity
I hope this helps you . There is no way out of the box to do this. Options to consider: Post processing of result set using something like an iterator to generate the list of entity id's and then use a custom query against the entity tables. This is
TAG : java
Date : October 28 2020, 04:01 PM , By : Lauren Alexis
What are the alternatives to Java Debug Interface
What are the alternatives to Java Debug Interface
it fixes the issue JDI is implemented on top of the JVMTI native API. So, if you were willing to go to the effort of implementing your own debug agent code, you could avoid the JDI layer. However, I doubt that it would get you any further. I suspect
TAG : java
Date : October 28 2020, 04:01 PM , By : Gabe
Spring selectively use implementation instead of interface
Spring selectively use implementation instead of interface
wish help you to fix your issue There (currently) is not any support out-of-the-box to enable class based proxies for a single class. Instead you would have to create the proxy yourself. The drawback of this is that you would need some intimate knowl
TAG : java
Date : October 28 2020, 04:01 PM , By : omar hamdy
Compiling in Java 7 a method that uses Java 8 types
Compiling in Java 7 a method that uses Java 8 types
it fixes the issue The only sure way of making your code Java7 AND Java8-compatible is to not use any Java8-specific features, including any classes introduced in Java8 and bytecode versions. The standard engineering practice is to follow the greates
TAG : java
Date : October 28 2020, 04:01 PM , By : Rodni Austria Daluso
Java 8 Stream Mapping Grouping operation
Java 8 Stream Mapping Grouping operation
it fixes the issue Instead of manipulating an external Map, you should use a collector. There are toMap and groupingBy, both allowing to solve the problem, though a bit verbose due to your class design. The main obstacle is the lack of an existing me
TAG : java
Date : October 28 2020, 04:01 PM , By : phoenix
@PersistenceContext in Autowired Construcor in Spring
@PersistenceContext in Autowired Construcor in Spring
like below fixes the issue I had this problem before and unfortunately I don't think that you can inject the EntityManager in the constructor using the annotation @Autowired. See this ticket:https://jira.spring.io/browse/SPR-10443
TAG : java
Date : October 28 2020, 04:01 PM , By : Elizabeth
Redirect to change pass page for users with expired password
Redirect to change pass page for users with expired password
I hope this helps you . I dont know how good or bad this solution, but it works for meSecurity Config :
TAG : java
Date : October 28 2020, 04:01 PM , By : Rich Johnson
Update Springboot properties at runtime Hibernate/JPA
Update Springboot properties at runtime Hibernate/JPA
around this issue Well, simply adding @TestPropertySource(properties = "spring.jpa.hibernate.ddl-auto = none") on a test class should work. That's all:)
TAG : java
Date : October 28 2020, 04:01 PM , By : Irene Palmer
Kafka consumer returns no records
Kafka consumer returns no records
I think the issue was by ths following , Try adding auto.offset.reset=earliest in your consumer properties. The default value is set to latest. I'm suggesting this because I see that your group.id is set to test, value that you may have already use i
TAG : java
Date : October 25 2020, 09:10 AM , By : Mark Shevada
Timediff as resultset
Timediff as resultset
hope this fix your issue i'm having trouble and i'm looking for a solution. , Try to calculate it as part of your sql
TAG : java
Date : October 25 2020, 09:10 AM , By : Emilio Gonzalez Limo
Deadlock happens if I use lambda in parallel stream but it doesn't happen if I use anonymous class instead?
Deadlock happens if I use lambda in parallel stream but it doesn't happen if I use anonymous class instead?
Hope this helps The difference is that lambda body is written in the same Test class, i.e. a synthetic method
TAG : java
Date : October 25 2020, 09:10 AM , By : JuanFe Monfort
Check if object does throw a NullPointerException
Check if object does throw a NullPointerException
around this issue , You can use this simplified version:
TAG : java
Date : October 25 2020, 09:10 AM , By : user2171941
I'm trying to understand how "calling an object's method" works in Java, but it's confusing me
I'm trying to understand how "calling an object's method" works in Java, but it's confusing me
hope this fix your issue So, You got a class named Positive, there you got a public static void main function. As you remember, Java programs start executing at the main method (read a bit this wiki: https://en.wikipedia.org/wiki/Entry_pointJava).so,
TAG : java
Date : October 25 2020, 09:10 AM , By : nemtaro
Honeypot sample test Odd Numbers question
Honeypot sample test Odd Numbers question
wish of those help You have two mistakes: (l + i % 2) : this will first compute i % 2 then add it to l which is wrong r - l + 2 : this should changes to r - l + 1
TAG : java
Date : October 25 2020, 09:10 AM , By : Merlinja
How to query Oracle via JDBC for an intersection
How to query Oracle via JDBC for an intersection
Does that help I need to check from Java if a certain user has at least one group membership. In Oracle (12 by the way) there is a big able that looks like this: , You can do this (using IN condition):
TAG : java
Date : October 25 2020, 09:10 AM , By : Massimo Kusmann
i keep getting an error: "testapp has stopped" when i go from Main2Activity.java to Main3Activity.java
i keep getting an error: "testapp has stopped" when i go from Main2Activity.java to Main3Activity.java
Hope this helps I am quite new to coding and I am not that quite knowledgeable in debugging process. , Declare activity in AndroidManifest.xmlLike that
TAG : java
Date : October 25 2020, 09:10 AM , By : user2171840
JPA: Adding new entry to a many-to-many taking long time
JPA: Adding new entry to a many-to-many taking long time
I hope this helps you . In this case, I would prevent your code from load the item list in memory.To do that, I can think about two options:
TAG : java
Date : October 24 2020, 08:10 PM , By : ChrisCanCode
Bouncy Castle PQC XMSS signing: NullPointerException after retrieving SecretKey from KeyStore
Bouncy Castle PQC XMSS signing: NullPointerException after retrieving SecretKey from KeyStore
Hope that helps This is a known issue: https://github.com/bcgit/bc-java/issues/380 Just use a beta version higher than 161b01 as suggested.
TAG : java
Date : October 24 2020, 08:10 PM , By : user2172180
Extremely slow built-in AES encryption with Java
Extremely slow built-in AES encryption with Java
seems to work fine SecureRandom is slow even in PRNG mode and can even block when not enough entropy is available.I recommend sourcing the random IV once and incrementing it between iterations similar to CTR mode. Or just use CTR mode.
TAG : java
Date : October 24 2020, 08:10 PM , By : John Dobson
Remove duplicates items from arraylist and hashmap
Remove duplicates items from arraylist and hashmap
wish helps you You are adding the entries of the Map to the original Lists. You should clear them first:
TAG : java
Date : October 24 2020, 08:10 PM , By : user2172066

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