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JAVA QUESTIONS

java and reading from .txt files
java and reading from .txt files
it fixes the issue , Change to:
TAG : java
Date : November 22 2020, 03:01 PM , By : Sam Kojo Prempeh
Getting 404 error from https://ml.nexosis.com/v1/ in browser
Getting 404 error from https://ml.nexosis.com/v1/ in browser
seems to work fine Directed to https://confluence.atlassian.com/kb/unable-to-connect-to-ssl-services-due-to-pkix-path-building-failed-779355358.html and to other SO entries on the topic.
TAG : java
Date : November 22 2020, 03:01 PM , By : Doopz
Java - Eclipse Compiler Compliance Level 1.6 not working as expected
Java - Eclipse Compiler Compliance Level 1.6 not working as expected
Hope this helps The compliance level only covers language features such as try-with-resources. The use of generics by a particular class is determined by the JRE/JDK library you are using. You will need to use an actual Java 6 JRE/JDK to get the corr
TAG : java
Date : November 22 2020, 03:01 PM , By : StephanieD
Autowire specific inner bean in Spring
Autowire specific inner bean in Spring
I wish did fix the issue. I have an interface called HttpClient, and two beans implementation of the bean,
TAG : java
Date : November 22 2020, 03:01 PM , By : Gary Petrie
How to Serialize an Attribute but dont persist it using spring data?
How to Serialize an Attribute but dont persist it using spring data?
To fix this issue Im studying spring data + JPA, and created a query like: , for @Antoniossss! Editing his answer:
TAG : java
Date : November 22 2020, 03:01 PM , By : nelson14991
variables reverting to default value
variables reverting to default value
wish help you to fix your issue In your Order class you have a Pizza instance variable, but in your PizzaDriver you're creating and using a different Pizza object. This is likely the root cause of your issues. (You're also doing the same thing with t
TAG : java
Date : November 22 2020, 03:01 PM , By : cody driew
How to make a JSP function to run only when called?
How to make a JSP function to run only when called?
this one helps. The events in the webpage (onclick event for example) is executed client side when someone opens your webpage and clicks the button. The JSP scriplets are executed when the webpage is opened and their result is the actual page that th
TAG : java
Date : November 22 2020, 03:01 PM , By : Thomas Sonne Olesen
Merge str value in Hadoop Reducer
Merge str value in Hadoop Reducer
this will help I tested this code an it looks ok. The most likely reason you're getting output like this is because you're running this reducer as your combiner as well, which would explain why you're getting three values. The combine does the first
TAG : java
Date : November 21 2020, 03:00 PM , By : Deborah Williams
Connection refused from client to server
Connection refused from client to server
Hope that helps I am learning about Sockets in Java and I am only missing how to receive back response from the server. , server is sending response fine
TAG : java
Date : November 21 2020, 03:00 PM , By : Mark S.
Apache Shiro - Assign role to groups with same prefix
Apache Shiro - Assign role to groups with same prefix
I wish this helpful for you There is no wildcard matching with the groupRolesMap. You could implement this functionality by overriding the getRoleNamesForGroups method in ActiveDirectoryRealm.
TAG : java
Date : November 21 2020, 03:00 PM , By : Sandeep
Android Studio - DatePicker in AlertDialog, null object reference
Android Studio - DatePicker in AlertDialog, null object reference
Any of those help Your problem is that your findViewById is looking in the wrong place for the DatePicker view. Calling findViewById in an activity will call it on the Activity's layout hierarchy, not the dialog's layout. You need to inflate the layo
TAG : java
Date : November 21 2020, 03:00 PM , By : Gail Stout
What is the solution for Mass Assignment: Insecure Binder Configuration Vulnerability?
What is the solution for Mass Assignment: Insecure Binder Configuration Vulnerability?
wish of those help You may refer to the problem Prevent mass assignment in Spring MVC with Roo. In your case, you can use @InitBinder provided by Spring MVC. @InitBinder would specify the white list for json and bean mapping.
TAG : java
Date : November 21 2020, 03:00 PM , By : rok kil
Removing vowels from an input string using a loop
Removing vowels from an input string using a loop
it helps some times I'm very much in favor of using a while loop for this, but since you stated you can only use a for loop...The problem is that your loop will iterate until i = 5, even if a vowel is detected. We need a way to tell the loop to prete
TAG : java
Date : November 21 2020, 03:00 PM , By : Tomislav Tumbas
Cannot get update query to work with Hibernate
Cannot get update query to work with Hibernate
will be helpful for those in need You should use @Transactional annotation so that the compiler knows that the transaction is manipulating the database, thus permits to perform Data Manipulation queries or it will simply execute it as a Data Definiti
TAG : java
Date : November 21 2020, 03:00 PM , By : Felipe Tappata
How do you add the value of one integer to another?
How do you add the value of one integer to another?
Does that help Just use the plus operator.So it would be myVariable + myOtherVariable, you can also store this in a variable like this myStoreVar = myVar + myOtherVar.
TAG : java
Date : November 21 2020, 03:00 PM , By : Willie Justice
FirebaseDatabase display a single value from a single user
FirebaseDatabase display a single value from a single user
Hope this helps Assuming that Users node is a direct child of your Firebase database root and 0x2s4Ft... is the uid of the logged in user, to get the value only from your Displayname field, please use the following code:
TAG : java
Date : November 21 2020, 03:00 PM , By : Brad Plummer
Year changing from negative -509 to a positive 510 in JDBC with H2 Database
Year changing from negative -509 to a positive 510 in JDBC with H2 Database
may help you . Bug, fixed This problem was due to a bug in H2.
TAG : java
Date : November 21 2020, 03:00 PM , By : Semi Joha
Do equal elements preserve their order in Insertion Sort algorithm?
Do equal elements preserve their order in Insertion Sort algorithm?
Hope that helps You are absolutely right. This here is a snippet of the Insertion Sort Algorithm from the popular book "Introduction to Algorithms" by Thomas H. Cormen.
TAG : java
Date : November 21 2020, 03:00 PM , By : Samuel.T
Can't get read DSA keys from .pem files
Can't get read DSA keys from .pem files
I hope this helps you . You aren't generating private and public key, you're generating private key and (X.509) certificate. A certificate contains a public key but is not the same as a public key. To read an X.509 certificate in Java, use Certificat
TAG : java
Date : November 21 2020, 03:00 PM , By : Ada-Simona Popescu
Copying InputStream to OutputStream halts unless I also write to System.out
Copying InputStream to OutputStream halts unless I also write to System.out
fixed the issue. Will look into that further As EJP suggested, I split the copying of the streams into separate threads via an executor, then I make sure to close them upon completion of the spawned process:
TAG : java
Date : November 21 2020, 03:00 PM , By : user7455107
How to show loading message in recyclerview
How to show loading message in recyclerview
To fix the issue you can do Add ProgressBar to your class and layout (near your recicleView). If you want text: add LinearLayout and place there ProgressBar and TextView (trigger visibility on linearLayout):
TAG : java
Date : November 20 2020, 03:01 PM , By : Joey Bravo
Could not resolve view with name 'forward:/index.html' in servlet with name 'dispatcherServlet'
Could not resolve view with name 'forward:/index.html' in servlet with name 'dispatcherServlet'
I wish did fix the issue. You have two conflicting paths registered in the "WebMVCConfig.java".This tells your app that every request should be forwarded to the "public" classpath folder.
TAG : java
Date : November 20 2020, 03:01 PM , By : Mastro Yobo
AWS API Gateway - HTTP Proxy for Elastic Beans Talk does not Passthrough responses
AWS API Gateway - HTTP Proxy for Elastic Beans Talk does not Passthrough responses
With these it helps I'm using API Gateway to decouple my Tomcat Backend in Elastic BeansTalk but I'm having trouble to get the responses from API. , Can I disable this header in API Gateway? In case of yes, how??
TAG : java
Date : November 20 2020, 03:01 PM , By : Ramneek Singh
org.apache.camel:camel-maven-plugin is missing (Windows 10)
org.apache.camel:camel-maven-plugin is missing (Windows 10)
around this issue In IntelliJ I can see this image: , Warning
TAG : java
Date : November 20 2020, 03:01 PM , By : Gabriela
Can't find null value for: Exception in thread "main" java.lang.NullPointerException (solved, caused by Boolea
Can't find null value for: Exception in thread "main" java.lang.NullPointerException (solved, caused by Boolea
fixed the issue. Will look into that further Boolean is a class, and as opposed to the primitive type boolean, when used as a field, its default value is null and not false.That's why isMale will throw a NPE on the line String sex = (isMale) ? "Male"
TAG : java
Date : November 20 2020, 03:01 PM , By : tatouh achref
Java code for Distance formula from input (1,2)(2,3)
Java code for Distance formula from input (1,2)(2,3)
To fix the issue you can do Yes, you should use regular expressions to take numbers from text. Something like this:
TAG : java
Date : November 20 2020, 03:01 PM , By : Olof Nilsson Heijer
How to change only the first occurrence of an object in an ArrayList, ignoring subsequent duplicates, in Java
How to change only the first occurrence of an object in an ArrayList, ignoring subsequent duplicates, in Java
With these it helps I wish to take an array of integers and check it against two numbers, the first of which is the number in the array that I want to replace and the second number is the number that I wish to replace the first number by. I have mana
TAG : java
Date : November 20 2020, 03:01 PM , By : Mohammed Zomam
ArrayList in one class is updated using GUI but is not changing in the JComboBox in another
ArrayList in one class is updated using GUI but is not changing in the JComboBox in another
This might help you What you need is to use the DefaultComboBoxModel as the data model for the combo box. Swing is based on a pattern called MVC : M for Model, hence the DefaultComboBoxModel V for View, your JComboBox C for controller, links the view
TAG : java
Date : November 20 2020, 03:01 PM , By : ArchStanton
Find sum, average and biggest number in an array
Find sum, average and biggest number in an array
it should still fix some issue The issue is integer division.In Java when you divide two integers, you get an integer (losing anything past the decimal point).
TAG : java
Date : November 20 2020, 03:01 PM , By : Aleksander Drozd
Asynchronous, composable return value for vector/stream data in Java 9
Asynchronous, composable return value for vector/stream data in Java 9
To fix the issue you can do Your use case falls very naturally into the world that RxJava is addressing. If we have an observable:
TAG : java
Date : November 20 2020, 03:01 PM , By : Lee Sear
Error in findViewById tried everything
Error in findViewById tried everything
it fixes the issue Method findViewById() is not implemented in class Fragment. That method is implemented for Activity or ViewSo, try the change below:
TAG : java
Date : November 20 2020, 03:01 PM , By : Jane Fortier
Java .split() by character with spaces in string
Java .split() by character with spaces in string
I hope this helps . You have to use the nextLine method to read the full line. next will read until the first token ("Chiquita" in your case because its followed by a space character and is interpreted as a delimiter). So change this line:
TAG : java
Date : November 19 2020, 03:01 PM , By : LutzL
Ambiguous method call with Integer
Ambiguous method call with Integer
I wish did fix the issue. Before Java 5 there was no autoboxing or auto-unboxing. This meant that if a method foo had a parameter of type Integer, the following did not compile
TAG : java
Date : November 19 2020, 03:01 PM , By : K. Alt
Check if hash map key is present before retrieving value
Check if hash map key is present before retrieving value
around this issue Given I am checking my hashmap as follows , Before Java 8, you have to explicitly do the check :
TAG : java
Date : November 19 2020, 03:01 PM , By : Hâmzâ MöÛddene
Update and Select in one Hibernate query
Update and Select in one Hibernate query
wish help you to fix your issue OK. Got it solved but have no clue what is different.Solution below:
TAG : java
Date : November 19 2020, 03:01 PM , By : Md Rasel
Reason of RecyclerView Not Loading Data
Reason of RecyclerView Not Loading Data
this will help I tried to create a List with RecyclerView in Android. However, I don't understand why the RecyclerView could not load data properly. I tried to compare my codes with the example available online and I could not tell what is the differ
TAG : java
Date : November 19 2020, 03:01 PM , By : Dawn Capria
passing data from class to Activity via interface and modifying the UI
passing data from class to Activity via interface and modifying the UI
hop of those help? The problem is that your Bluetooth class doesn't run on the main/UI thread, as the activity does. In order to avoid race conditions, Android crashes the app to let you know that you're doing something wrong. Fortunately, there is a
TAG : java
Date : November 19 2020, 03:01 PM , By : Pinni Smith
RESTful Web Service through HTTPS
RESTful Web Service through HTTPS
seems to work fine I have installed SSL certificate for my domain in Plesk by Let's Encrypt extension. The default port for HTTPS is 443. It works fine. , Backup your cacert from JAVA_HOME:
TAG : java
Date : November 19 2020, 03:01 PM , By : Sagar
@Nullable and SonarQube 'Conditionally executed blocks should be reachable' warning
@Nullable and SonarQube 'Conditionally executed blocks should be reachable' warning
This might help you Apparently, this problem was caused by us using sonar-scanner without specifying sonar.java.libraries. Since it's multimodule maven project it wasn't clear to us how to specify sonar.java.libraries correctly. Nicolas Peru, from So
TAG : java
Date : November 19 2020, 03:01 PM , By : Lahcen Amourgh
Java JSON object parsing
Java JSON object parsing
wish help you to fix your issue Your StackOverflowError is a result of trying to serialise the root gson JsonObject as json with a second library (the org.json.JSONObject wrapper):
TAG : java
Date : November 19 2020, 03:01 PM , By : Alexander Wahlsten
JSon - custom key serialization of nested maps
JSon - custom key serialization of nested maps
wish of those help I have a nested Map for which I need a custom key serializer deserializer (StructureNode contains references to other objects which are needed to function as key for this map). I used the following method for this: , You can fix t
TAG : java
Date : November 19 2020, 03:01 PM , By : Max Power
Java draw pixel circle in 2D array
Java draw pixel circle in 2D array
hope this fix your issue cos and sin functions produce double values from -1 to +1, and when you cast double to int like this: int ElX = (int) (x + x1), some data will be inevitably lost, because such cast just chops the decimal part away. Instead, I
TAG : java
Date : November 19 2020, 03:01 PM , By : sadan49
Java - Use Class parameter in method parameter
Java - Use Class parameter in method parameter
will be helpful for those in need Why this doesn't work You are trying to access a generic type at runtime, which does not work in this case, because of type erasure.
TAG : java
Date : November 19 2020, 03:01 PM , By : ynwest
Trying to query my DB and pass results into an object then to the front, mysql and java
Trying to query my DB and pass results into an object then to the front, mysql and java
will be helpful for those in need So currently I am attempted to query my DB and pull out all of the results, make them an object, then push the object to an array of objects, I am having trouble making this work correctly.
TAG : java
Date : November 18 2020, 03:01 PM , By : sandip dey
return type in database constructor
return type in database constructor
fixed the issue. Will look into that further Your constructor name needs to match the Java class name. Your class is DatabaseConnection. Your constructor is Connection. These are not the same. Rename one to match the other.
TAG : java
Date : November 18 2020, 03:01 PM , By : Alvaro Isaza
MSC000001: Failed to start service of the type Schedule
MSC000001: Failed to start service of the type Schedule
will be helpful for those in need Despite being a Wildfly question, this is the same (resolved) issue: Deploying Java @Schedule with Wildfly 8.1.0 Final User comment about resolution: Deploying Java @Schedule with Wildfly 8.1.0 Final Other comment: h
TAG : java
Date : November 18 2020, 03:01 PM , By : AjBuddha
How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate
How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate
Any of those help As I explained in this article, if you have more than 50 or 100 child entities, you shouldn't map a collection.Therefore, @OneToMany is misleading because, in reality, @OneToFew makes more sense. So, when many means 1000 or 10000, m
TAG : java
Date : November 18 2020, 03:01 PM , By : Prakash
Error on curl for sample Spring OAuth2.0 server?
Error on curl for sample Spring OAuth2.0 server?
wish of those help The error message is a big hint. You need to quote your arguments. After reading on github, the command you must issue is
TAG : java
Date : November 18 2020, 03:01 PM , By : MR FRESH
While ends even if the condition is unfilled Java Multithreading
While ends even if the condition is unfilled Java Multithreading
Hope that helps Your condition means that the loop should continue while both right and left are false, and it stops once any of them is true. You should try with while((left != true) || (right != true)), meaning the loop will stop only once both are
TAG : java
Date : November 18 2020, 03:01 PM , By : john_ itle_
Java WindowBuilder is not working, showing blank design page
Java WindowBuilder is not working, showing blank design page
should help you out This was due to an error with 'Tabbed panes'. I had to change them for a JMenu instead.
TAG : java
Date : November 18 2020, 03:01 PM , By : Imad Limouni
Servlet doesn't access to POST method after submit in Spring
Servlet doesn't access to POST method after submit in Spring
This might help you If GET request working with same code, then POST should also work.You might need to look at below line of code, which may causing for failure
TAG : java
Date : November 18 2020, 03:01 PM , By : Sanjay Thangaraj
JPA map view with no primary key to an entity
JPA map view with no primary key to an entity
should help you out JPA Specification says that an Entity class must have a unique, immutable ID.Logically, if it does not have any primary key, it can't be called entity. What you can do instead is create a POJO representation of your VIEW, then exe
TAG : java
Date : November 18 2020, 03:01 PM , By : Ole Harland
Problems with named queries in Java
Problems with named queries in Java
this will help I have a problem. I made a dynamic web project using JPA, named queries and a Web Servlet. Here is how the project is organized: , Your query
TAG : java
Date : November 18 2020, 03:01 PM , By : Nishita
Add new textview in fragment after click on button in another fragment
Add new textview in fragment after click on button in another fragment
seems to work fine I managed to make it work with TinyDB, which can store string arraylist as SharedPreferences.This is what I have in fragment with button
TAG : java
Date : November 18 2020, 03:01 PM , By : Clarke West
AES-256-CBC in Java
AES-256-CBC in Java
will help you Both ways are working correctly, however you are encrypting different things.The here string syntax (
TAG : java
Date : November 18 2020, 03:01 PM , By : Andrea Canale
Spring boot + hibernate search: entityManagerFactory dependency error
Spring boot + hibernate search: entityManagerFactory dependency error
fixed the issue. Will look into that further AFAICS Spring Boot is still based on Hibernate ORM 5.0.x. See https://repo1.maven.org/maven2/org/springframework/boot/spring-boot-dependencies/1.5.7.RELEASE/spring-boot-dependencies-1.5.7.RELEASE.pom .This
TAG : java
Date : November 18 2020, 03:01 PM , By : John Naue
ClassDefNotFoundError with local aar
ClassDefNotFoundError with local aar
With these it helps I found out what happened. It works if you disable InstantRun in Android Studio.
TAG : java
Date : November 18 2020, 03:01 PM , By : FredJ
Add value to specific key and datetime
Add value to specific key and datetime
wish help you to fix your issue The .child() method creates a new node if it doesn't exists. so you can simply do:
TAG : java
Date : November 18 2020, 03:01 PM , By : Ali Sidd
Get one-to-one relationship objects with JOIN query with myBatis
Get one-to-one relationship objects with JOIN query with myBatis
hope this fix your issue Note that using @Many involve that Worker class has Collection property. In you case, you must use @One.Just quoting API documentation:
TAG : java
Date : November 17 2020, 03:01 PM , By : Donbelar Goh
Spring Security - Invalid column index exception
Spring Security - Invalid column index exception
should help you out Finally I have found solution. We need to add ",1 as enabled" to our query.
TAG : java
Date : November 17 2020, 03:01 PM , By : pslidhar

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