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JAVA QUESTIONS

TreeMap foreach doesn't change value object
TreeMap foreach doesn't change value object
Hope that helps You have to use the iterator to mutate the values in the TreeMap. Using current.values() will create a copy instead of mutating the object. You need to iterate over the keys of the TreeMap and update the values.
TAG : java
Date : November 04 2020, 03:01 PM , By : cr3at0r
Java Is one arraylist part of another in order
Java Is one arraylist part of another in order
around this issue I am making an app for android. I am trying to guess what song the user just played on xylophone. I have: private List mDespacito = new ArrayList(Arrays.asList("f", "a","d","d")); and private List mPlayed = new ArrayList(); When use
TAG : java
Date : November 04 2020, 03:01 PM , By : Jason Seo
Incrementing 2D Arrays vertically and horizontally?
Incrementing 2D Arrays vertically and horizontally?
will be helpful for those in need Your code doesn't work because you aren't taking into account the previous cell.Your logic for determining the value of a specific cell is fillRightArray[i][j] += step*(j+1); .
TAG : java
Date : November 04 2020, 03:01 PM , By : ADE MUH AKBAR
javax.websocket.Session - which map implementation is getUserProperties() returning?
javax.websocket.Session - which map implementation is getUserProperties() returning?
I wish this help you Tyrus implementation As for Tyrus, I had a look at the TyrusSession.java implementation. The extract which interests you is (numbers refer to row):
TAG : java
Date : November 04 2020, 03:01 PM , By : Ankit
Java 7 - Pairing two ArrayLists
Java 7 - Pairing two ArrayLists
it helps some times What i'm trying to work out is that when my code has determined what the page is, how do i pair the page and the page type
TAG : java
Date : November 03 2020, 03:01 PM , By : nitesh ahirwar
time zone issue with MyBatis + MyBatis CDI + PostgreSQL
time zone issue with MyBatis + MyBatis CDI + PostgreSQL
may help you . I have a strange time-zone issue in MyBatis. , I would set everything at UTC to make everything simpler.
TAG : java
Date : November 03 2020, 03:01 PM , By : Avulsed
PrintWrite new CSV file after validating information from old CSV file and LOAD DATA INFILE into MySQL
PrintWrite new CSV file after validating information from old CSV file and LOAD DATA INFILE into MySQL
This might help you It seams that you are appending \n inside createNewUserCSV(), but you are calling LOAD DATA INFILE using \r\n. So replace:
TAG : java
Date : November 03 2020, 03:01 PM , By : Imad Koucem
JDK 8 is NOT installed - ERROR 404: Not Found
JDK 8 is NOT installed - ERROR 404: Not Found
wish help you to fix your issue After a lot of googling around I found a answer on the Ubuntu forum.Basically, the problem seems to be that there is a new version of java and the installer wasn't updated to reference it.
TAG : java
Date : November 03 2020, 03:01 PM , By : Roch Liles
Get the random value inside for loop
Get the random value inside for loop
it fixes the issue The variable z here is out of scope. It's what's called a block variable and it can only be accessed from within the loop. To access it outside, it needs to be declared outside of that loop:
TAG : java
Date : November 03 2020, 03:01 PM , By : wenguang huang
JAVA MySQL insert with AES_ENCRYPT fails java.sql.SQLException: Incorrect string value
JAVA MySQL insert with AES_ENCRYPT fails java.sql.SQLException: Incorrect string value
To fix the issue you can do https://dev.mysql.com/doc/refman/5.7/en/encryption-functions.html mentioning following: "Many encryption and compression functions return strings for which the result might contain arbitrary byte values. If you want to sto
TAG : java
Date : November 03 2020, 03:01 PM , By : zephyr
Using Jooq to set a Character Array instead of String
Using Jooq to set a Character Array instead of String
With these it helps The appropriate approach here would be to create a data type binding for your VARCHAR column (which jOOQ treats as String) and your "user-defined type" char[]. The implementation would be along the lines of:
TAG : java
Date : November 03 2020, 03:01 PM , By : Adamya Shyam
javax.json - Build JsonObject with arraylist and one separated attribute
javax.json - Build JsonObject with arraylist and one separated attribute
wish helps you From the JsonObjectBuilder interface, you can obtain your JsonObject in this way:
TAG : java
Date : November 03 2020, 03:01 PM , By : YunYouJun
Selenium : Java Null pointer exception
Selenium : Java Null pointer exception
it should still fix some issue Initialisers are invoked before constructors and hence, NullPointerException, try the below code:
TAG : java
Date : November 03 2020, 03:01 PM , By : Sandeep
Dot plus (".+") notation in json schema; what does it mean?
Dot plus (".+") notation in json schema; what does it mean?
Hope this helps Okay so by looking at your json I can figure it out that(a json-schema validator) the String represents a regular expression which denotes the "type":"String" of the JSON object can contain every character except for the line terminat
TAG : java
Date : November 03 2020, 03:01 PM , By : Projeto Escoliose Br
Spring bean not identified with @Repository annotation
Spring bean not identified with @Repository annotation
this will help To make use of JpaRepository you need to add one of the following to your Application: @EnableAutoConfiguration for Spring Boot to figure it out itself or
TAG : java
Date : November 03 2020, 03:01 PM , By : Mr. T
Generic types and wildcards in nested lists
Generic types and wildcards in nested lists
it should still fix some issue example2 doesn't work because List is not a subtype of List, similar to how List is not a subtype of List even though String is a subtype of Object. Basically, when the type is not directly parameterized by a wildcard,
TAG : java
Date : November 03 2020, 03:01 PM , By : Alexander Erlemann
How to change the signature ID?
How to change the signature ID?
it helps some times Currently, there's no way to change those IDs, as they are auto generated internally to ensure they are unique.Source code: https://github.com/luisgoncalves/xades4j/blob/master/src/main/java/xades4j/production/SignerBES.javaL154
TAG : java
Date : November 03 2020, 03:01 PM , By : Zhifang Ye
Why create methods which only call other methods?
Why create methods which only call other methods?
wish of those help I guess it's impossible to say what the real reason is in this case, but this kind of thing is pretty common in Java programming. A typical reason is that software maintainers want to change method naming conventions to make names
TAG : java
Date : November 03 2020, 03:01 PM , By : hachibeomlim
Using PowerMock to mock System.class in multiple tests not working as expected
Using PowerMock to mock System.class in multiple tests not working as expected
Hope this helps There's a micro library to help with mocking system classes called System Rules. Use is as simple as
TAG : java
Date : November 03 2020, 03:01 PM , By : Andreea Gina Verdes
Stack exchange oauth response unreadable
Stack exchange oauth response unreadable
I think the issue was by ths following , You can try OkHttp. Here is an example works for me. It automatically solves that decompression problem for me.
TAG : java
Date : November 03 2020, 03:01 PM , By : Henry van der Veer
performance and size limitations on HttpServletResponse.getOutputStream.print(string) vs getWriter(String)
performance and size limitations on HttpServletResponse.getOutputStream.print(string) vs getWriter(String)
may help you . He assumed wrong. If anything it's inefficient, or at least useless to do that one character at a time. If you have a String in memory, you can write it out at one go without worrying.If you're only writing text, use a Writer. OutputSt
TAG : java
Date : November 03 2020, 03:01 PM , By : Georgi Karagocev
JAVA objectinputstream cant drop out from the loop
JAVA objectinputstream cant drop out from the loop
it helps some times This is a duplicate of this question :Java FileInputStream ObjectInputStream reaches end of file EOF
TAG : java
Date : November 02 2020, 03:01 PM , By : zbenek12345
List of Java Object from Database with Slowness issues
List of Java Object from Database with Slowness issues
will be helpful for those in need To reduce the number of database access populate a List with all Article id's and then create a method with the following signature (adapt to your needs):
TAG : java
Date : November 02 2020, 03:01 PM , By : Paul Nggrbr
SonarQube Scanner error when run "sonar-scanner" command
SonarQube Scanner error when run "sonar-scanner" command
This might help you You need to build your project before the analysis. Let's say that your project structure is equal to:
TAG : java
Date : November 02 2020, 03:01 PM , By : Nakul Bhatt
Rendering issue in java swing
Rendering issue in java swing
hop of those help? I had the same problem as you, and I managed to get rid of this rather irritating bug by using the Oracle Java JDK 7 instead of OpenJDK 7 which seems to be having the above issue.For me the issue is notable just by hovering over th
TAG : java
Date : November 02 2020, 03:01 PM , By : Bolat Demirkan
Understanding ZipSecureFile.setMinInflateRatio(double ratio)
Understanding ZipSecureFile.setMinInflateRatio(double ratio)
this will help A zip bomb detection works the following way:While uncompressing it checks the ratio compressedBytes/uncompressedBytes and if this falls below a special amount (MinInflateRatio), then a bomb was detected.
TAG : java
Date : November 02 2020, 03:01 PM , By : Jonny
Get a sorted list in order of nearest or upcoming date first and then the rest depending on today's date
Get a sorted list in order of nearest or upcoming date first and then the rest depending on today's date
help you fix your problem What if you create two sorted lists, one with upcoming dates and one with dates that have already passed. Then populate a third list first with upcoming dates and then with past dates. :- TestCode.java
TAG : java
Date : November 02 2020, 03:01 PM , By : Vaibhav Singh
What is the proper location for test classes in a multi module project?
What is the proper location for test classes in a multi module project?
With these it helps First of all, each module should have its own test classes in order to keep the test classes within the same module of the code tested by them. It would be a really bad idea to have the test classes in another module. In fact, wha
TAG : java
Date : November 02 2020, 03:01 PM , By : Đồ Tô
Maven - how to create ejb client when packing jar
Maven - how to create ejb client when packing jar
This might help you It looks like you need the change your from jar to ejb and specify the under .
TAG : java
Date : November 02 2020, 03:01 PM , By : user7450233
Accessing HTTP Context in PlayFramework
Accessing HTTP Context in PlayFramework
wish help you to fix your issue You can use an action to intercept the call to an specific / all methods in a controller and pass any necessary objects from the action to the controller.Following is a quick action example:
TAG : java
Date : November 02 2020, 03:01 PM , By : jaypergesman
Jetty: How to validate SSL client certs in application code?
Jetty: How to validate SSL client certs in application code?
I wish this help you While TrustAll seems to be the likely solution, it only works if no TrustStore and KeyStore is given. Then you can't connect using a regular client as the server has no certificate to give during the handshake.To get a sensible t
TAG : java
Date : November 02 2020, 03:01 PM , By : Katyayani Singh
What are the minimum maven dependencies are required to run Junit 5 in eclipse?
What are the minimum maven dependencies are required to run Junit 5 in eclipse?
fixed the issue. Will look into that further I went ahead and had eclipse add the libraries itself to a sample non-maven project to see what I was missing. After some experimenting, here is the minimum dependencies for a pom that are needed to run ju
TAG : java
Date : November 02 2020, 03:01 PM , By : user7450155
Button ActionEvent send Email and show loading screen simultaneously
Button ActionEvent send Email and show loading screen simultaneously
I hope this helps you . I think the problem is that the setIcon method expects a String and not an URL, try it like this. Update Now you can see when exactly which part of the code is executed
TAG : java
Date : November 01 2020, 03:01 PM , By : J. Due
External gradle dependency on libGDX project
External gradle dependency on libGDX project
I hope this helps . I am working on an android game and external library using LibGDX. I'm getting the following error: , Adding:
TAG : java
Date : November 01 2020, 03:01 PM , By : Andriy Moskalyuk
How to replace a token (CoreLabel) in a sentence (CoreMap) using Stanford NLP?
How to replace a token (CoreLabel) in a sentence (CoreMap) using Stanford NLP?
wish helps you I'm going to venture that even though you've changed the word, you haven't changed the originalText. In general, you should be a bit wary of these sorts of transformations -- they can have all sorts of bizarre effects (e.g., your chara
TAG : java
Date : November 01 2020, 03:01 PM , By : user7450106
Weblogic 12.2.1.3 from Moxy to Jackson
Weblogic 12.2.1.3 from Moxy to Jackson
hop of those help? I would like to change the JSON parser from Moxy to Jackson, and I have followed the shared library approach, but without any result, Moxy is still used. , Mention JAX-RS 2.0 as a dependency in your pom.xml
TAG : java
Date : November 01 2020, 03:01 PM , By : Curious
How can my application access the keyStore.jks configured in Tomcat server.xml
How can my application access the keyStore.jks configured in Tomcat server.xml
it helps some times I guess you should be able to get the parameters values through ServerFactory.getServer().findServices()[0].findConnectors()[0] or org.apache.tomee.loader.TomcatHelper.getServer() (depending on your version of Tomcat - see this qu
TAG : java
Date : November 01 2020, 03:01 PM , By : Itz_Faded
Is there a way to retrieve data from database if mapped object was changed?
Is there a way to retrieve data from database if mapped object was changed?
this will help I don't know, but you can choose to just select the existing columns in the DB and convert them to an Object with empty pears field.SELECT apples, oranges FROM fruits
TAG : java
Date : November 01 2020, 03:01 PM , By : Alaa Zreik
Specify SQL dialect for ViewDefinition in BigQuery API
Specify SQL dialect for ViewDefinition in BigQuery API
this will help It seems that it is indeed broken. I've just open a case in Google about it (please, star it!): https://issuetracker.google.com/issues/70662064Meanwhile, it is working with the "bq" command line, or with REST (which is the approach I t
TAG : java
Date : November 01 2020, 03:01 PM , By : Lina17x
Change app language
Change app language
hope this fix your issue I changed my android app language by this method: , Try this .LanguageUtils
TAG : java
Date : November 01 2020, 03:01 PM , By : hackSlanger
Why my checkstyle-supressions are ignored?
Why my checkstyle-supressions are ignored?
it fixes the issue I have problem. It looks like my checkstyle-supressions are ignored. Im sure that path to file is correct (checkstyle.xml is loaded correctly), but checkstyle-supressions aint working. Do you know whot could be wrong? Below is my m
TAG : java
Date : November 01 2020, 03:01 PM , By : Jeff Mendoza
Display nth row from table DB in Java using getString?
Display nth row from table DB in Java using getString?
To fix this issue I want to show data from a Table Database using SQLite in JAVA my code:
TAG : java
Date : November 01 2020, 03:01 PM , By : Robert Morphett
use same random array for each sort
use same random array for each sort
seems to work fine Clone or copy the array before each sort and pass the clone to the sort routine. You can use array.clone() or Arrays.copyOf(array, array.length) to make the copy.
TAG : java
Date : November 01 2020, 03:01 PM , By : spartan lokesh
error:0c0890ba:ASN.1 encoding routines:asn1_check_tlen:WRONG_TAG
error:0c0890ba:ASN.1 encoding routines:asn1_check_tlen:WRONG_TAG
wish help you to fix your issue In this code you seem to load keystore in BKS format as it would be X.509 encoded certificate, which is bound to fail
TAG : java
Date : November 01 2020, 03:01 PM , By : Pelumi Fagbemi
Java.lang.Object; cannot be cast to <hibernate entity>
Java.lang.Object; cannot be cast to <hibernate entity>
it should still fix some issue So - I'm new to hiberate and Java in general. I've seen a couple threads in regards to this error, but none seem to fit my situation. I have a simple JPQL query as shown below that should returnthe function ID and name
TAG : java
Date : November 01 2020, 03:01 PM , By : Kacper Zdyb
Creating a neo4j sessionfactory in SDN 5.0.0
Creating a neo4j sessionfactory in SDN 5.0.0
this will help Your initial configuration looks good, except there's a missing .build() after the builder instantiation (it's a typo in the doc).So the configuration init should be :
TAG : java
Date : November 01 2020, 03:01 PM , By : Von Aso
ArrayList is empty after creating new objects
ArrayList is empty after creating new objects
like below fixes the issue I'm trying to create an ArrayList of dummy objects using a for loop in my MainActivity.java. This seems to work fine as I get object references for each object I create:
TAG : java
Date : October 31 2020, 04:00 PM , By : Ashish Gupta
Kafka NoSuchMethodError on HDP Platform
Kafka NoSuchMethodError on HDP Platform
this one helps. ReasonThe services provided in the HDP platform are suffixed with the HDP version, so Kafka 0.10.0.2.5.3.16-1 is actually Kafka version 0.10.0, and digging further reveals that it's version 0.10.0.1. The HDP version is 2.5.3.
TAG : java
Date : October 31 2020, 04:00 PM , By : Maks Romanyuc
How to convert hex to decimal rgb565 using java?
How to convert hex to decimal rgb565 using java?
I hope this helps . First of all, each hexadecimal character is codified by 4 bits. Therefore, having 4 hex characters means you have 16 bits to code a color.RGB565 uses 5 bits for red, 6 bits for green and 5 bits for blue. Having n bits for a color
TAG : java
Date : October 31 2020, 04:00 PM , By : iSh0w
Opening file using mPdfViewer.fromFile(file) shows an empty pdf
Opening file using mPdfViewer.fromFile(file) shows an empty pdf
With these it helps I'm having a problem with opening file using PDFViewer library. , I found out what caused a problem. The thing is that I wrote:
TAG : java
Date : October 31 2020, 04:00 PM , By : code scratch
i keep getting a null in my textview after getting the string value from another activity
i keep getting a null in my textview after getting the string value from another activity
wish help you to fix your issue I parsed the String to the other Activity using: , You need to use string reference which actually has the value so
TAG : java
Date : October 31 2020, 04:00 PM , By : Proma Mukherjee
Pass selected dropdown to controller- mvc
Pass selected dropdown to controller- mvc
will help you I changed the link to button and added the mapping to action=/exportReportByStore.do
TAG : java
Date : October 31 2020, 04:00 PM , By : mohith nayak
Java 1.7, Group list items in an arraylist and aggregate by spesific attribute from the arraylist
Java 1.7, Group list items in an arraylist and aggregate by spesific attribute from the arraylist
To fix the issue you can do , You can do it with simple for loop involving a List and a Map, e.g.:
TAG : java
Date : October 31 2020, 04:00 PM , By : ruiwan
Java Language naming convention for .class files
Java Language naming convention for .class files
it should still fix some issue This is addressed in JLS §13.1., The Form of a Binary:
TAG : java
Date : October 31 2020, 04:00 PM , By : Jagmohan Prasad
How to use FetchType.LAZY with ManyToMany?
How to use FetchType.LAZY with ManyToMany?
fixed the issue. Will look into that further Using Spring JPA try the keyword "JOIN FETCH" on your JPQL you can handle lazy initialization exception. Example
TAG : java
Date : October 31 2020, 04:00 PM , By : James Murray
Jackson Can not deserialize instance of java.util.ArrayList out of VALUE_STRING token
Jackson Can not deserialize instance of java.util.ArrayList out of VALUE_STRING token
this one helps. Sotirios is correct.Problem is with webservice returning strings instead of json.
TAG : java
Date : October 31 2020, 04:00 PM , By : Dihelson Mendonça
Why liquibase unable to resolved the db.changelog classpath?
Why liquibase unable to resolved the db.changelog classpath?
wish of those help The structure mentioned for chorke─init─change-1.0.00.GA.jar contains liquibase change logs in classpath is good enough and spring-boot application.properties also configured exactly. But there were some silly mistake in liquibase-
TAG : java
Date : October 30 2020, 04:01 PM , By : arshad
How to deal with GSON with nested abstract classes?
How to deal with GSON with nested abstract classes?
I wish this helpful for you To use same serializer and desrializer for every subtype of Aclass(A+B+C) you can use registerTypeHierarchyAdapter(A.class, new A_Adapter()) From documentation:
TAG : java
Date : October 30 2020, 04:01 PM , By : Kyriakos Kyriakides
How to make getter return something depending on the argument?
How to make getter return something depending on the argument?
Hope this helps First of all, you havent declared any 'product' in your main class, so when you do return this.product; you'll get the error you are saying. As Kayaman said, you should learn some tutorials about Java variables. But, you can try this
TAG : java
Date : October 30 2020, 04:01 PM , By : ovyczqtnnge
XML to Json with Camel
XML to Json with Camel
it should still fix some issue My program should convert XML file format to JSON file format. Im trying to use the marshal command, but I get errors: , You need to add camel-xmljson as dependency in your Maven pom file
TAG : java
Date : October 30 2020, 04:01 PM , By : Andrew Sackett

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