JAVA QUESTIONS

Inferring type of class arguments in Java generic interface

it fixes the issue In the case of GenericClass there is no information in the class file which determines the type. This is due to type erasure.The best you can do is infer the type from the contents of the Map. If you need to record the type you can

TAG : java

Date : November 09 2020, 04:01 AM , By : Kerrily Jennings

Banach Fractal Curve Java - Recursive

hop of those help? Every time you call n--, you are passing n to the function and then decrementing it by one for the next call. Instead, you need to pass n - 1 to each call, as the call itself will decrement n further in its own recursive call, even

TAG : java

Date : November 09 2020, 04:01 AM , By : Yuki Cripps

How to exit out of a remote server when jenkins user invokes a script

will help you Turns out i just needed to add > /dev/null 2>1 at the end of the ssh command so that it looks like this :

TAG : java

Date : November 08 2020, 04:01 AM , By : Adam Smith

Different logging levels for different packages LogBack

should help you out I am using LogBack for logging and i currently have it setup like this , I was using wrong class when getting the logger.

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180922

Exception in thread main: Unable to locate an element with the x path expression

I wish did fix the issue. I'm using Selenium Webdriver with Java to automate a page. The problem I'm facing is that my test can't recognize any element on the page. , You are using invalid xpath. Try

TAG : java

Date : November 08 2020, 04:01 AM , By : Samira Asmar

Powermockito whenNew returns null if not matched

may help you . My finding shows that there is no good way to do partial constructor mocking with PowerMockito / PowerMockito 2. By the logic you should be able to do something like

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180859

Spring Boot JPA working in 2.0.6.RELEASE but 2.1.1.RELEASE is not working for same pom.xml

will help you Did you build the project after changing the project?Just clear maven .m2 local repository and try to build it again using

TAG : java

Date : November 08 2020, 04:01 AM , By : lfjun

Column stretch type issue when data overflows to next page

should help you out Setting detail's split type as 'PREVENT' will prevent the row from stretching to next page and move the entire row to next page.

TAG : java

Date : November 08 2020, 04:01 AM , By : Greg

Exception when creating datasource with PostgreSQL driver in Spring Boot

Does that help I found the problem: Eclipse showed the dependencies properly, but as it seemed the class was not really present, I tried to run it manually, so when I executed:

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180808

How can I make base url dynamically in Appconstants class

I wish this helpful for you As per my understanding you need to implement a spinner in an existing project which is having 3 static value and each value carry a different path for logging.First thing as per my understanding you can't make Base URL dy

TAG : java

Date : November 08 2020, 04:01 AM , By : Suzy M Woodruff

Can not for each in HashMap

this will help I tried to use for each loop to iterate through HashMap keys but it doesn't compile. , You're map defaults to objects set it's casts

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180784

java - do I have to overwrite all versions of overloaded function in inheriting class?

I hope this helps . Keep your approach. Unfortunately, it is not possible and there is no shortcut for overriding all methods (or "overriding" all constructors). Java methods and constructors must have fixed parameters. This is because of language de

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180771

Explain the output of the java program

I wish this help you I think the output should be "cougar c f", since calling Cougar() should just print cougar and call to go() should print 'c' for this.type and 'f' for super.type, since super keyword is used to call the parent class. Can anyone p

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180734

(Java) Publish WebService Endpoint and HttpServer at the same time?

I hope this helps you . Try with different ports. For example, if you use 8888 for the Endpoint, use 8890 or something for the HttpServer.The EndPoint uses an embedded HTTP Server implementation which is included as part of Java. So, you are essentia

TAG : java

Date : November 08 2020, 04:01 AM , By : Henry Ellis

MySQL in Docker on Ubuntu: Warning: World-writable config file is ignored

will be helpful for those in need In my /etc/mysql/my.cnf, I have: !includedir /etc/mysql/mysql.conf.d configed, and I think the my.cnf file in my !includedir directory should overide /etc/mysql/my.cnf, according to https://dev.mysql.com/doc/refman/8

TAG : java

Date : November 08 2020, 04:01 AM , By : Vijay Narayanan

About dependency in maven

it should still fix some issue The artifact you are using is not directly usable in maven.If you can use a more recent version (1.9, 1.10) of batik you can try this:

TAG : java

Date : November 08 2020, 04:01 AM , By : Leonardo Bo

Intellij unable to configure and view files

I hope this helps . Installed copy identified to be corrupted. The issue is resolved by downloading and using version 2018.3.1

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180610

'class' or 'interface' expected

I wish this help you Instead of the above code in AppiumTest class use the codecap.setCapability(MobileCapabilityType.PLATFORM_NAME,MobilePlatform.ANDROID); cap.setCapability(MobileCapabilityType.DEVICE_NAME, "Android device");

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180589

Can this be converted to stream one-liner?

like below fixes the issue I am wondering if this could be written more neatly as a stream function: , Yes, using a Stream with reduce:

TAG : java

Date : November 08 2020, 04:01 AM , By : user2180581

Java android room two foreign key

I hope this helps . I have a table with two foreign key into two different tables , Try to do it like this

TAG : java

Date : November 07 2020, 04:01 AM , By : Jamie Metcalf

Auto-generate interface methods in Java with Visual Studio Code

will be helpful for those in need Refer to this post: https://github.com/redhat-developer/vscode-java/issues/270 , you can put your cursor on the class name and then press the shortcut "⌘.".

TAG : java

Date : November 07 2020, 04:01 AM , By : Thomas Salamone

how to get rid of checks for null and if-else if signature in this code?

should help you out If PartOne, PartTwo, PartThree don't make part of a base class, you could not take advantage of polymorphism.In this case, your actual way is an acceptable trade off.

TAG : java

Date : November 07 2020, 04:01 AM , By : Bare Ciyow

How to Deal with empty or blank cell in excel file using apache poi

like below fixes the issue The getCell method has a second argument that specifies a policy for handling empty cells.Use it in a good ol' for loop:

TAG : java

Date : November 07 2020, 04:01 AM , By : charles2008

Check Java version via Ansible playbook

Hope that helps I ran your script on my machine and it did not work either. I modified it a little bit

TAG : java

Date : November 07 2020, 04:01 AM , By : user2180508

java - Non-static method 'getLogger' cannot be referenced from a static context

this one helps. If you're using log4j2 then you imported the wrong LogManager and Logger. You should have this:

TAG : java

Date : November 07 2020, 04:01 AM , By : user2180481

ViewModel not observed by AppCompatActivity

this one helps. You are using ViewModel from AndroidX library, and also using Support library for AppCompatActivity.Migrate your Support library to AndroidX to fix your issue.

TAG : java

Date : November 07 2020, 04:01 AM , By : user2180415

Optional<T> when isPresent() get property or null when it is null; functional style in Java 8

it should still fix some issue When I retrieve a Student entity from DB, the repository returns a nullable Optional. It has a birthdate field. , Try this

TAG : java

Date : November 07 2020, 04:01 AM , By : Muhammad Ghanoz Ghaz

Java 8 and lambda calculus equivalent

Hope that helps Your solutions for identity and application are correct. If wouldn't define them as functions however, I find x->x and Function::apply as readable as identity() and apply(), so I would simply use them directly.As for self-application,

TAG : java

Date : November 07 2020, 04:01 AM , By : user2180327

How to access a parent class variable via a child class

To fix the issue you can do Only instances of class B, or sub-classes of B can access the b instance variable directly (unless you cast A to B within the body of the A class, which is bad practice).You can give class A read-only access to that value

TAG : java

Date : November 07 2020, 04:01 AM , By : Richard

Why does selenium click only the first line of code and not the two others?

fixed the issue. Will look into that further I tested first if the first line of code to click the XPath which works but then when I add a second line of code to click By.name() it doesn't work, so I tried to change in XPath and then in CSS selectors

TAG : java

Date : November 07 2020, 04:01 AM , By : Mayri Mayoneza

What will be if reassign reference to lock object inside synchronization block?

will help you NOTE: Invalid question - see comment of @Bukhtoyarov Vladimir , This code

TAG : java

Date : November 07 2020, 04:01 AM , By : Hristo Gospodinov

Lazy fetch not work for OneToOne relation in EclipseLink

this one helps. To make lazy loading on toOne relationships work EclipseLink must inject a proxy into the reference. This process is called "weaving".This is not enabled by default so you have to check out the documentation how to enable weaving for

TAG : java

Date : November 07 2020, 04:01 AM , By : Vache Ghadimian

ClassCastException when opening excel file

To fix this issue The latest versions of java are not fully supported by Apache POI libraries. You can refer to https://poi.apache.org/help/faq.html 23 24 . That is why it was working for you on another PC (probably it had Java 8). The simplest solu

TAG : java

Date : November 07 2020, 04:01 AM , By : Alexandra12

Run Length Encoding in Java - unintended output

I wish did fix the issue. First you shouldn't use variable input for input and output. It makes it difficult to read and maybe produces errors. Than you should check for an empty input. After that you simply need one loop where you pick a character,

TAG : java

Date : November 07 2020, 04:01 AM , By : bjorndv

How to mock a service method with iteration in a loop?

wish helps you I am trying to do an Unit test of a method that has a loop in it. , You can use the any Argument Matcher.

TAG : java

Date : November 07 2020, 04:01 AM , By : adidasKA

Java System.setSecurityManager() doesn't work well with policy file

this one helps. Presumably demo.policy doesn't allow the classes permissions to set system properties.It's also worth noting that the code sets configuration for the security manager after the security manager has been initialised.

TAG : java

Date : November 06 2020, 04:01 AM , By : user2180205

How do you generate random values between 0-z with Math.random?

this will help Hello as the title says I want to generate a random text with only characters between 0 and a lowercase z. So far I am able to get values in an area and typecast them to a char which I then save in my array. , If your task is to do onl

TAG : java

Date : November 06 2020, 04:01 AM , By : Farhan Ali

Why does ":" at the last of a groovy statement does not throw any error?

Hope this helps I mistakenly wrote the following in the groovy console but afterwards I realized that it should throw error but it did not. What is the reason behind groovy not throwing any error for colon at last of the statement?Is it allocated for

TAG : java

Date : November 06 2020, 04:01 AM , By : Pierre Despereaux

How to fix Sonar issue "Remove this call to "wait" or move it into a "while" loop"?

may help you . I am received a request to fix sonar issues in a legacy project, there is a code segment like this, every call to this function will be paused for 50ms: , Here the while appears helpless :

TAG : java

Date : November 06 2020, 04:01 AM , By : Rahimullah Niazi

CLOSED How to set overScrollMode=never without disable fadingEdge?

Does that help I have a RecyclerView. I need to set the value of overScrollMode = "never" to remove this animation , but at the same time the fadingEdge option is disabled. Can you help me turn off the animation about which I wrote above, without dis

TAG : java

Date : November 06 2020, 04:01 AM , By : user2180123

Add custom toolcontrol to toolbar E4

I think the issue was by ths following , I added ahidden icon to the toolbar when adding the custom toolcontrol to it. Eclipse scales the toolbar correct know.

TAG : java

Date : November 06 2020, 04:01 AM , By : user2180120

Java: Make all fields either final or volatile?

I think the issue was by ths following , While I feel private final should probably have been the default for fields and variables with a keyword like var making it mutable, using volatile when you don't need it is much slower, often around 10x slowe

TAG : java

Date : November 06 2020, 04:01 AM , By : user2180111

Why is jhipster not updating

wish of those help I want to install primeng 7.0.0 to my Angular project but first I need to update my JHipster to last version. , Try installing it rather than upgrading it?

TAG : java

Date : November 06 2020, 04:01 AM , By : Mark I.

Is it possible to return outer method from inner method?

it fixes the issue Not directly.You can return a value from the inner method indicating that the outer method should return, and check that in the outer method:

TAG : java

Date : November 06 2020, 04:01 AM , By : ayblu

Vaadin DateField saves null value to database

will be helpful for those in need Everything is okay except one little detail in your custom Converter class: there is one incocnsistency with the usage of Date class.Three times you use java.sql.Date as Identifier of the class, but one time you forg

TAG : java

Date : November 06 2020, 04:01 AM , By : Hagen Finley

Text To Speech (TTS) delays by 3 seconds to speak text

it helps some times This is probably not the most efficient way of doing it,I had a similar problem to this and used a Handler to solve it.

TAG : java

Date : November 06 2020, 04:01 AM , By : rammi

Sending a token between classes

like below fixes the issue I would like to sending string between java class in android studio. I have class CreateToken.java and MainActivity.java, how can I send string yourToken to MainActivity.java and how can I receive string yourToken in MainAc

TAG : java

Date : November 06 2020, 04:01 AM , By : user2180019

Check if a list of objects contains another object in Java

hop of those help? Like others have pointed you need to override equals and hashcode we can do this in 1 line.

TAG : java

Date : November 06 2020, 04:01 AM , By : Aditya

Scanning for Network Printers On Cordova-Android

I hope this helps you . As the index value was the reason why the callback was not sent, so to solve it just sending the callback as soon as you discover the Network Printer and storing it in a var(JSONArray in my case ) will give you the list of the

TAG : java

Date : November 06 2020, 04:01 AM , By : Scorpion

oAuth 2 Resource Server Configuration to access an Authorization Server

I wish this helpful for you so in ResourcesServer you will need to specify @EnabledResourceServer and use RemoteTokenServices to check you token with Authorization Server

TAG : java

Date : November 05 2020, 04:01 AM , By : user2179844

URL should not contain Servlet name after exporting

This might help you , You can do servlet mapping in web descriptor file (xml file).

TAG : java

Date : November 05 2020, 04:01 AM , By : john

Increasing Subsequence Recursive Java

I wish did fix the issue. I have the following problem: A sequence of numbers is said to be monotonically increasing (or simply increasing) if every number in the sequence is greater than, or equals to, the number preceding it. write a boolean functi

TAG : java

Date : November 05 2020, 04:01 AM , By : Kevin Cargill

Spring injects @Autowired fields during manual class instantiation

will be helpful for those in need The problem is the following: You annotated a field with @Autowired - that tells Spring, that there is a dependency that needs to be injected there You annotated a method with @Bean - which puts the return value into

TAG : java

Date : November 05 2020, 04:01 AM , By : Sarah Ware

Can I use a library built with Kotlin coroutines in plain java project?

it should still fix some issue Yes. You can. You may want to have interface adopted to java guidelines, but there is no technical restriction that prevent it.

TAG : java

Date : November 05 2020, 04:01 AM , By : Brendan

Why getCalendar().getTime() returns wrong Year?

should help you out Because SimpleDateFormat("HH:mm", Locale.US).getCalendar() has something to do with Serialization which causes the problemCheck this answer

TAG : java

Date : November 05 2020, 04:01 AM , By : Jenno Richi

Java how to initialize two dimensional array elements to null

this will help You can't set the value of a primitive variable to null. If you need null values, you have to use a reference type.Integer is the reference type you want to use instead of int:

TAG : java

Date : November 05 2020, 04:01 AM , By : sajith

Rerun whole class in case of failed test case using TestNG

it fixes the issue Finally found a workaround to rerun the whole class. I would call it a workaround since technically TestNG does not provide a way to re-execute @BeforeTest in case a failure occurs at any point of time.The best possible method I fo

TAG : java

Date : November 05 2020, 04:01 AM , By : Shatrong Ever

Querying a database table without an entity class

seems to work fine Is it possible, using Entity Manager or some other JPA API to execute a query and get results, in say like as a List, without having to create an Entity class for the same. , You can use createNativeQuery like this:

TAG : java

Date : November 05 2020, 04:01 AM , By : Manel Ramesh Nayak

Separating TextView from the edges of its background in Android Studio

should help you out If you just need to "Separate" It from the edge of the BACKGROUND, You can set a padding/margin to the TextView

TAG : java

Date : November 05 2020, 04:01 AM , By : Alexander Akass

Looping and Streams - how to do it in this case?

may help you . You can just create a final object from the i that changes i's value. finalI value is final and never changes.

TAG : java

Date : November 04 2020, 04:01 AM , By : NAVEEN YSN