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JAVA QUESTIONS

Linear Layout grid showing in emulator but not on device, what could be cause?
Linear Layout grid showing in emulator but not on device, what could be cause?
will be helpful for those in need I found that images being used were too large (in terms of capacity e.g. 7mb each). I made the images smaller in size and everything began working fine.
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042341
How to draw on top of scaled Image in java?
How to draw on top of scaled Image in java?
should help you out IMHO the mistake is that you are storing absolute values when it is clicked, instead of storing relative positions. (that takes scale and translation into account - this is what you do when drawing the image)1) keep the transforma
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042322
Spring Data Mongo - Inheritance and Embeddable
Spring Data Mongo - Inheritance and Embeddable
hope this fix your issue Managed to resolve the issue.Basically, I needed to add the package containing the Vehicle classes to get scanned to my Mongo Configuration class as follows:
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042290
How to turn an integer value into a double decimal value?
How to turn an integer value into a double decimal value?
will be helpful for those in need I want to parse two integer values into a double value, where the end product should look like this:
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042273
Access dockerfile ENV variables in entrypoint
Access dockerfile ENV variables in entrypoint
I hope this helps you . I think an issue is the periods (dots) within the environment variable names. I think, valid identifiers may only include alphanumeric characters and underscores. You will also need to use the shell form of ENTRYPOINT to get a
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042263
Spring MVC model binding not working for non public members
Spring MVC model binding not working for non public members
Hope that helps It seems your field names are breaking the deserializing logic. I do not know why are you trying to use those uppercase field names, but the problem is that when there is a setter for Name field, setName(), Jackson thinks this maps to
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042228
How can I wrap the int[] into an object and implement equals()?
How can I wrap the int[] into an object and implement equals()?
will be helpful for those in need I shall leave the question of a better way of doing this and explain what you are being told.o is always of type Object in the equals method. The Object class does not have a myArray field - hence the error. That you
TAG : java
Date : November 27 2020, 05:23 PM , By : edwardrkerr
Weird problem with my favicon, not showing up in some views
Weird problem with my favicon, not showing up in some views
I hope this helps you . If any of your JSPs show in the browser with a different path (other than root), then the relative path you've specified for the favicon will look in the same path for it and not find it. If you use an absolute path for your f
TAG : java
Date : November 27 2020, 05:23 PM , By : user48729
RecyclerView inside of NavigationDrawer not scrolling
RecyclerView inside of NavigationDrawer not scrolling
will help you you should change content place with navigationView (navigationView must be last-child)
TAG : java
Date : November 27 2020, 05:23 PM , By : user3042088
GAE Getting lots of CancellationException for Task Queue DataStore call
GAE Getting lots of CancellationException for Task Queue DataStore call
I wish this helpful for you Understanding quot;CancellationException: Task was cancelledquot; error while doing a Google Datastore queryBased on this question, it sounds like CancellationException means that you are hitting the 10-minute timeout that
TAG : java
Date : November 27 2020, 12:01 PM , By : user3042029
Add method annotation at runtime with Byte Buddy
Add method annotation at runtime with Byte Buddy
like below fixes the issue You found a blindspot in Byte Buddy that I thought of fixing for a while. Early versions of Byte Buddy did not allow for defining annotations but when it did, the API was already so widely used that I could not change it an
TAG : java
Date : November 27 2020, 12:01 PM , By : user3042025
Getting a nullpointer exception in variable initializer
Getting a nullpointer exception in variable initializer
this will help I have been getting a NullPointerException at the line of the variable loss and when I try to initialize the method in the main class, I can`t seem to find the problem.
TAG : java
Date : November 27 2020, 12:01 PM , By : Brian Goff
How to get the question to loop if the user input is incorrect
How to get the question to loop if the user input is incorrect
this one helps. One way to do it is by looping until you see the correct/desired input. One problem with this kind of approach is that it will never terminate if user doesn't enter the expected values (if this is what you are looking for),Code Snippe
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041927
Is there a generic way to work with optimistic locking using Hibernate/Spring Data JPA?
Is there a generic way to work with optimistic locking using Hibernate/Spring Data JPA?
wish helps you As the question is tagged with spring-data-jpa, I will answer from Spring world.Just have a look at @Retryable. I find it quite useful for exactly the same use case you describe. This is my usual pattern:
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041926
Equivalent Inflate for Deflate function in Java
Equivalent Inflate for Deflate function in Java
hope this fix your issue @Kartikeya You need to replace Deflater deflater = new Deflater(); line with Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION,true); in your compress function.
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041915
Can you use an int array as an objects parameter?
Can you use an int array as an objects parameter?
it should still fix some issue I am very new to java programming and I am trying to create a RPG game. What I am looking to do is create a unit (playable character) that can be modified by item parameters (item stats). It seams to me it would be simp
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041914
Creating Predicates on the fly
Creating Predicates on the fly
this will help I have a String[] of user input and I want to filter a Collection of devices based on if the hostName of the device contains any of the user input.
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041899
Returning value from persisted Groovy code without using java.io.File
Returning value from persisted Groovy code without using java.io.File
I wish this help you The straight solution for your case would be using GroovyClassLoader.parseClass​(String text)http://docs.groovy-lang.org/latest/html/api/groovy/lang/GroovyClassLoader.htmlparseClass(java.lang.String)
TAG : java
Date : November 27 2020, 12:01 PM , By : MAK
Difference between a hashmap and an array in time complexity of a lookup
Difference between a hashmap and an array in time complexity of a lookup
I think the issue was by ths following , I think a good way to understand this is by using an actual use-case. Let's say you want to store a student name and his marks. So there are 2 fields.
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041821
Placeholder for TreeView?
Placeholder for TreeView?
it helps some times TreeView has no placeholder support - not entirely certain, why not, but could be that an empty tree (whatever that means: null root? root without children? root not showing?) is a rare species.It's rather simple to implement, tho
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041797
What is the section between the package name and the class activity called
What is the section between the package name and the class activity called
wish helps you Many people call it the imports section.import in Java is a mechanism to name the types you use with unqualified names, e.g. AppCompatActivity in place of fully qualified android.support.v7.app.AppCompatActivity.
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041791
InvalidSelectorException: invalid selector: Compound class names not permitted
InvalidSelectorException: invalid selector: Compound class names not permitted
I hope this helps you . It will not work with select class because, its not pure drop-down, its un-ordered lists of currenciesyou need to open drop down by clicking on it, do something like this
TAG : java
Date : November 27 2020, 12:01 PM , By : user3041708
JdbcTemplate.queryforList() returns value but map.get returns null
JdbcTemplate.queryforList() returns value but map.get returns null
I hope this helps . This happened because I used different Spring JDBC version and Spring version. Just changed Spring JDBC to Spring version and it worked like a charm.
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041688
Convert CountDownTimer Cancel feature to RxJava
Convert CountDownTimer Cancel feature to RxJava
should help you out I have an RxObservable that emits an item. I have an RxObserver that consumes the item, turns something on, waits 30 seconds, then turns that same thing off. If in the middle of that 30 second wait the Observable emits another ite
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041657
@RunWith(CucumberWithSerenity.class) throws NoClassDefFound cucumber/runtime/junit/Assertions
@RunWith(CucumberWithSerenity.class) throws NoClassDefFound cucumber/runtime/junit/Assertions
fixed the issue. Will look into that further There were two separate issues:Dependency | cucumber-java - > v4.2.0
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041635
Jackson deserialize to list of child elements
Jackson deserialize to list of child elements
like below fixes the issue If you'd like to deserialize into List directly , you can just specify the desired valueType in xmlMapperreadValue
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041611
Array of eight random Integers where each Integer has a difference of at least 15 from all others in the array?
Array of eight random Integers where each Integer has a difference of at least 15 from all others in the array?
may help you . To find COUNT numbers in range MIN to MAX (exclusive) that are more than DISTANCE apart, build a TreeSet and use the ceiling(...) method to find nearby values.Example
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041580
Not getting the file extension right when serving a file
Not getting the file extension right when serving a file
this will help Found the problem, my filename contained white spaces that couldn't be parsed, so if my file name was "math exam.pdf", when I downloaded the file the file name would be "math".The soultion is to use escape quotes to surround the file n
TAG : java
Date : November 26 2020, 03:04 PM , By : Ondra Hermanek
How to use @Autowired on field variable when class is not a Bean?
How to use @Autowired on field variable when class is not a Bean?
it fixes the issue When a class cannot be changed to be annotated with a Spring stereotype, @Bean is a very good alternative :
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041538
How to calculate a percentage as an exponential progression?
How to calculate a percentage as an exponential progression?
I wish this helpful for you What I want to do is very simple, but I can't figure out the math and code for it.
TAG : java
Date : November 26 2020, 03:04 PM , By : douwe
How to add text to a JComboBox when using IntelliJ UI Designer?
How to add text to a JComboBox when using IntelliJ UI Designer?
I hope this helps you . Add the constructor to the class and add items to the JComboBox from there:
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041515
TableColumn #setCellValueFactory For Class With HashMaps
TableColumn #setCellValueFactory For Class With HashMaps
I wish this helpful for you Your cell value factory needs to make use of its data argument. That argument is the actual row data for which the TableColumn is requesting a value.Ignore sets. You should not be looking at all of your data, only the sing
TAG : java
Date : November 26 2020, 03:04 PM , By : Martin Ryttler
How do I access the ApplicationContext from a service within the micronaut framework?
How do I access the ApplicationContext from a service within the micronaut framework?
Hope that helps The project at https://github.com/jeffbrown/injectcontext shows 2 ways to inject the ApplicationContext.https://github.com/jeffbrown/injectcontext/blob/1f319a3bb3db8eff05f159dd8dc642b227662307/src/main/java/injectcontext/FirstService.
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041457
Accessing a micro-service from Java application
Accessing a micro-service from Java application
I hope this helps you . I am accessing a microservice from Java and it results in 404-Not found response, while the same things work fine via Swagger-ui. , Endpoints can be case sensitive. Try changing:
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041433
How to fix "We found a problem with some content in 'abc.xlsm'. Do you want us to try to recover as much as we can?
How to fix "We found a problem with some content in 'abc.xlsm'. Do you want us to try to recover as much as we can?
Hope this helps Finally resolved the issue using jacob api and also by making changes to template. Issue was with local variable defined in Excel which I was able to access by going to (Formulas -> Name Manager) and deleted the variable.Even after de
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041426
org.postgresql.util.PSQLException - 2019
org.postgresql.util.PSQLException - 2019
Hope this helps You should really use PreparedStatement as written in the comment, but your error can go away with the following fix:
TAG : java
Date : November 26 2020, 03:04 PM , By : Sakshi Tyagi
Cannot display an unicode character on windows cmd using Java
Cannot display an unicode character on windows cmd using Java
around this issue Change the encoding cmd uses to UTF-8 with chcp 65001 and then run your Java program with Java's file encoding set to UTF-8:
TAG : java
Date : November 26 2020, 03:04 PM , By : Murugan
Breaking apart a String using IndexOf and substring without using split or a loop
Breaking apart a String using IndexOf and substring without using split or a loop
Any of those help Let's say I have an email address. Like: kate.daniels@somecompany.com. , Here is how you would do it in this scenario:
TAG : java
Date : November 26 2020, 03:04 PM , By : user3041362
Spring validator class does not validate the Dto data
Spring validator class does not validate the Dto data
Any of those help I believe the @Valid annotation works on JSR-303 validation spec with annotations in your DTO. You have 2 options
TAG : java
Date : November 26 2020, 12:01 PM , By : Nirav
Storm UI is not starting
Storm UI is not starting
I hope this helps you . Since our team is putting some other .jar into apache-storm/lib/. This issue was caused by some other jars which were not provided in base apache-storm/lib. After going through the dependency hierarchy, finally, I found the so
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041273
Why do I get an error when I try to click outside the inventory / in the inventory where there's no item
Why do I get an error when I try to click outside the inventory / in the inventory where there's no item
I hope this helps you . From the code and the stacktrace everything I can say is that either e.getCurrentItem().getItemMeta() or e.getCurrentItem() is returning null. Stacktrace
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041199
Why does List.contains(Object) behaves differently?
Why does List.contains(Object) behaves differently?
I think the issue was by ths following , According to the documentation list contains is supposed to use equals(). Meaning, it should return true if of the values within the object are the same. However, in the example below contains(Object) behave d
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041190
Stream.map() requires second parameter to be ? extends R>
Stream.map() requires second parameter to be ? extends R>
With these it helps Below is my method in which I am trying to effectively simulate the decipherment of a Caesar shift cipher.
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041173
How can I manage onClick function from my custom listview adapter in main activity class
How can I manage onClick function from my custom listview adapter in main activity class
like below fixes the issue You can create an interface with methods that with params of data that you want to pass and then pass the interface to the adapter and implement that interface in the activity
TAG : java
Date : November 26 2020, 12:01 PM , By : Alex3041111
tagForChildDirectedTreatment(boolean) deprecated
tagForChildDirectedTreatment(boolean) deprecated
This might help you As I had the same problem and I couldn't find any answer I wrote it, but I don't know whether it's right or nothere is my code
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041097
Error ORA-01858. Java throwing an error message in a different language
Error ORA-01858. Java throwing an error message in a different language
it should still fix some issue Do the same you did for SQL developer: Add VM option -Duser.language=enIn Eclipse, you do that in the Run Configuration.
TAG : java
Date : November 26 2020, 12:01 PM , By : Jörg Knippschild
JAVA : Why does the Scanner work only, when inputs are in specific order
JAVA : Why does the Scanner work only, when inputs are in specific order
I hope this helps you . The first example does not work because nextIntand nextDouble do not consume the line terminator which is needed to move on to the next line which necessary to use nextLine as you expect. In the second scenario nextLine is per
TAG : java
Date : November 26 2020, 12:01 PM , By : user3041023
Changing FavIcon in Vaadin using pure Java alongside Springboot
Changing FavIcon in Vaadin using pure Java alongside Springboot
Any of those help Add icon.png to resources/META-INF/resources/icons/icon.png
TAG : java
Date : November 26 2020, 06:28 AM , By : Pash
How to find a web-element
How to find a web-element
will be helpful for those in need To locate and click the element associated with the label as Number of GPUs as the desired element is Angular element you have to induce WebDriverWait for the element_to_be_clickable() and you can use either of the f
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040939
Animate Drawable icon in Android - ClassCastException VectorDrawable cannot be cast to Animatable
Animate Drawable icon in Android - ClassCastException VectorDrawable cannot be cast to Animatable
should help you out I was able to find out the problem by myself, I'm posting it if someone will need it someday:In the /layout/activity_main.xml I needed to change this:
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040929
Does the order of function calls matter in Firestore query?
Does the order of function calls matter in Firestore query?
will help you From the perspective of performance, the order in which you build the Query object doesn't matter. The end result is a Query with the same internal configuration.However, startAt is not compatible with startAfter. Only one or the other
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040899
How to kill a Rhino script
How to kill a Rhino script
wish of those help You should extend the ContextFactory class and override the method observeInstructionCount(Context ctx, int instructionCount). This method will be called periodically by Rhino and you can check how long it has been running so far w
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040896
Supporting the "PATCH" verb - WSHttpHandler handleExchange gives WARNING: Cannot handle HTTP method: PATCH
Supporting the "PATCH" verb - WSHttpHandler handleExchange gives WARNING: Cannot handle HTTP method: PATCH
hope this fix your issue I have created a class that uses javax.xml.ws.Endpoint to create a REST endpoint: , PATCH is not supported here - other handlers should be used instead.
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040867
What is the practice for loading native libraries in Websphere Liberty?
What is the practice for loading native libraries in Websphere Liberty?
I hope this helps . The above is correct; the library declaration in apps.xml should be maintained above any application declarations. Updating jvm.options is not necessary. A short-hand is also acceptable using fileset, and an application can refere
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040824
How to inherit @ConditionalOnProperty to any static inner @Configuration class?
How to inherit @ConditionalOnProperty to any static inner @Configuration class?
this one helps. Your understanding is wrong on all nested classes that are annotated with @Configuration will be loaded automatically. With nested @Configuration classes
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040822
Change order of columns in a txt file
Change order of columns in a txt file
it fixes the issue That's a hell of a job. What I would do is:(1) split the lines at |
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040813
Receive pending message in Azure Service Bus queue with Java program?
Receive pending message in Azure Service Bus queue with Java program?
hop of those help? Based on the tutorial for receiving message, you need to create a queue client, and register a message handler for it. A) Get connection string.
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040799
JUnit refers to same var value
JUnit refers to same var value
Hope that helps In testSendMailWIthData() can you retrieve all the fields of each email in emails2[]? I think you are receiving the email sent from the first test as well in the second test. In the first test, you have sent an email with CC null/abse
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040778
A substitute to using a counter variable
A substitute to using a counter variable
wish helps you You can use a string joiner, which allows setting an empty value, which will allow you to not include the "WHERE" when your set is empty.
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040761
How to run Slenium+Java+Cucumber without ide
How to run Slenium+Java+Cucumber without ide
I hope this helps you . Hello there are tests written on Java + cucumber , You can download Maven with following terminal script :
TAG : java
Date : November 26 2020, 06:28 AM , By : user3040734

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