JAVA QUESTIONS

What is wrong with my Havel-Hakimi Algorithm code?

I wish this help you The problem is with Collections.sort(temp), it sorts the input collection in ascending order, while you want it to be sorted in descending order. You can use Collections.sort(temp, Collections.reverseOrder())That was the logical

TAG : java

Date : January 02 2021, 06:48 AM , By : Kristian Hofslaeter

create liquibase changeset validation rules

like below fixes the issue Have you considered introducing code reviews instead? On the other hand if your goal is not to forbid using dropColumn, but to annotate it to make sure that developer knows what he/she is doing then you could introduce two

TAG : java

Date : January 02 2021, 06:48 AM , By : user182203

How do i call this Ffun() and access this class?

hop of those help? You can't do that, without changing the code.There is no way to tell the outer world about a local class defined in a method.

TAG : java

Date : January 02 2021, 06:48 AM , By : firebasket

Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.longArrayOps([J)[J

I think the issue was by ths following , this is clear version issue. nothing else even though you are claiming to use 2.12.x seems like its pointing to old version of scala try to clean and build. verify dependencies in maven or sbt which ever you a

TAG : java

Date : January 02 2021, 06:48 AM , By : Daniel Reslie

Android WebView failed to load (net::ERR_CLEARTEXT_NOT_PERMITTED)

should help you out cleartext is disabled in android 9 so you must add network securityAdd src\main\res\xml\network_security_config.xml with the following content:

TAG : java

Date : January 02 2021, 06:48 AM , By : phatfish

How to read or write file as getExternalStorageDirectory is deprecated in API 29?

Any of those help From the docs you can see:

TAG : java

Date : January 02 2021, 06:48 AM , By : Cenneca

How can I make an app dark and light theme?

it should still fix some issue I think you are on a good track, you would define different styles for each and every theme, something like this:

TAG : java

Date : January 02 2021, 06:48 AM , By : bdurbin

Getting Time limit exceeded error in java

will be helpful for those in need You’re code is not correct.If you were meant to count the even and odd numbers in a, then you are counting the even numbers correctly. If n is not equal to the length of a, then your calculation of the count of odd n

TAG : java

Date : January 02 2021, 06:48 AM , By : Jonathan

Usage of @Valid vs @Validated in Spring

will be helpful for those in need It works when using Validated and doesn't when using Valid simply because Spring Boot requires properties classes to be annotated with Validated if you want them to be validated. See the documentation:

TAG : java

Date : January 02 2021, 06:48 AM , By : John Phipps

How to apply filter to get specified data from data.gov.in api?

seems to work fine I have used filters in different API like below to pass in querystring, filters[state]=Gujaratfilters[district]=Banaskanth It works perfectly.

TAG : java

Date : January 02 2021, 06:48 AM , By : barefootChild

How to pass Java options/variables to Springboot app in docker run command

it should still fix some issue Make use of application.properties in springboot to override any variables from outside. We heavily use this in our production environments.You need to:

TAG : java

Date : January 02 2021, 06:48 AM , By : kaart

Google Cloud SQL-Unable to connect to MySQL database

Does that help once I had the same issue (I know how painful it is) and as much as I would I dont have to much experience with java but this is what I can tell you about how I connect cloud-sql with app-engineBe aware of this two things:

TAG : java

Date : January 02 2021, 06:48 AM , By : robinator

Variable resets to default value between onClickListeners

Does that help It looks like you have two currentAssessment variables. One that is private to the class and another that is confined to the scope of onItemClick. Once onItemClick exits you've lost that assignment, and anywhere else where you're refer

TAG : java

Date : January 02 2021, 06:48 AM , By : Hadley

Sort integer array using comparator interface and lambda expression

Hope that helps There are no overrides of Arrays::sort that take an array of primitives and a lambda as a parameter.

TAG : java

Date : January 02 2021, 06:48 AM , By : besn

Java Date Time Start and End of day without any TimeZone information

seems to work fine The Z at the end is time zone information, meaning offset 00:00 from UTC, aka Zero, aka Zulu, so first you parse the string into a type that stores date, time, and the Z timezone. With Java 8 Time API, that would be Instant, Offset

TAG : java

Date : January 02 2021, 06:48 AM , By : jedameron

ConcurrentModificationException when trying to sum numbers of an Arraylist using multiple threads in Java

should help you out The problem is happening because your methods are synchronized in "object level", I mean, the monitor lock it uses is of a particular object (tst1,tst2,tst3). In other words, each synchronized method is using a different lock. Cha

TAG : java

Date : January 02 2021, 06:48 AM , By : Stephen Dewar

Sorting in java reverseOrder

To fix the issue you can do Here is an example of a custom Comparator method for sorting the way you want:

TAG : java

Date : January 02 2021, 06:48 AM , By : user150744

JPA auto flush before any query

should help you out As JPA is a specification this question is simple to answer. Check out the spec :-)3.10.8 Queries and Flush Mode

TAG : java

Date : January 02 2021, 06:48 AM , By : Joe

How to properly implement observable list to populate a combobox

With these it helps Your code will not even compile as written. You are trying to pass a String to your FXCollections.observableArrayList() method. That method does not accept a String argument.To create a proper ObservableList, you need to pass an a

TAG : java

Date : January 02 2021, 06:48 AM , By : smbrant

Passing values from Java action to next Java action in Oozie workflow

like below fixes the issue A Google search on oozie capture_output java points straight to the Java Cookbook section "Capture-output element", quoting: In this example, we pass a the PASS_ME variable between the JAVA action and the PIG action. The PA

TAG : java

Date : January 02 2021, 06:48 AM , By : dnyaneshwar

Jmeter - Unable to run 1000 concurrent users per/sec

should help you out Looking into Active: 7 summarizer output you seem to have not more than 7 active users. Given you have only 2 Samplers and only 3 loops defined under the Thread Group my expectation is that you're simply not achieving the desired

TAG : java

Date : January 02 2021, 06:48 AM , By : Brandon

Control Flow Explanation

it helps some times Write a method named hasSharedDigit with two parameters of type int. , This here:

TAG : java

Date : January 02 2021, 06:48 AM , By : Scott Everts

Opening a .pdf link in a Webview

this one helps. When you click a link to a .PDF the webview will try to download the file. What you really want to do is open the file in an external browser session. That will display the PDF, and also give you the choice to download it if you wish.

TAG : java

Date : January 02 2021, 06:48 AM , By : tlync

How to set 301 status code in actionResponse in Liferay MVC portlet

like below fixes the issue There are 2 problems to look at here, First, check if you are not setting the code after send redirect commits the response. Second, to set a code like that, you might want to try something like the following:

TAG : java

Date : January 02 2021, 06:48 AM , By : George Handlin

What To Unit Test

wish of those help There's no right answer, and it's a matter of personal opinion and feelings.However, some things I believe are universal:

TAG : java

Date : January 02 2021, 06:48 AM , By : Chris Tattum

How to fix repast simphony error : saf.v3d.scene.VComposite.addChild(VComposite.java:46)

around this issue This error can occur if the getVSpatial method in the style for child agent returns null. JavaDoc for getVSpatial

TAG : java

Date : January 02 2021, 06:48 AM , By : Liy

How to decide on jdk version - Oracle's shorter release cycle

hop of those help? In the past, Java major releases often tended to be loaded with far-reaching features that had a massive impact on the code that you could and should write, like generics (Java 5), functional constructs (Java 8), and modules (Java

TAG : java

Date : January 02 2021, 06:48 AM , By : Schmidt

What would happen if I run parallel code in a multi-threading server program?

hop of those help? The crucial difference between concurrency and parallelism is that concurrency is about dealing with a lot of things at same time (gives the illusion of simultaneity) or handling concurrent events essentially hiding latency. On the

TAG : java

Date : January 02 2021, 06:48 AM , By : vbanos

Save state of toggle button

To fix the issue you can do Use SharedPreferences, it is just a file with KEY-VALUE logic that saves some simple data on it. SharedPreferences is mostly used for flags(as your case) or to store simple other settings/informations:

TAG : java

Date : January 02 2021, 06:48 AM , By : WuJanJai

How to get Json Array in Json Object using volley in android and set this json data in listview code and Xml Avilavble

I wish this help you I am using volley for JSON parsing. I want to get some data using GET from server side, that I tried to send. Can any one tell me how? Following is my codes. I also tried HashMap and JSONobject but getting this error. , use :

TAG : java

Date : January 02 2021, 06:48 AM , By : Ansari

How to allow only !@#$%^&* in a string using java

This might help you I want to allow only above mentioned special characters. , Try this:

TAG : java

Date : January 02 2021, 06:48 AM , By : Bado

Element type "hibernate-mapping" must be declared

I wish did fix the issue. I have around 75 .hbm.xml files in my project. Out of 75 files 4 files were using , In mapping, I replace by:

TAG : java

Date : January 02 2021, 06:48 AM , By : Amit Battan

Setup Tomcat for multiple websites in one server (linux)

Does that help You can create VirtualHosts to setup multiple websites with multiple domain names in one server. You can try out same in tomcat 7, 8 and in 9 as well. 1.Edit your relevant server.xml file and include Virtual hosts as below.Make sure to

TAG : java

Date : January 02 2021, 06:48 AM , By : mansoor

compile groovy classes on the fly

I hope this helps . It is using GroovyClassLoader. There are some caveats that I've run into when dealing with Static class fields and cross-references, but I basically use this setup on a couple of my projects. You may have to watch loading order in

TAG : java

Date : January 02 2021, 06:48 AM , By : Jay Crockett

Java 8 timezone API get next transition not returning DST change in Moscow 1991

Any of those help Your observations are correct.One way to confirm the change in March 1991 is: on the Time Zone and Clock Changes page of timeanddate.com (see the link at the bottom), select 1990 - 1999 from the dropdown. I quote:

TAG : java

Date : January 02 2021, 06:48 AM , By : arbeitandy

Escaping quotes using jackson-dataformat-xml

like below fixes the issue Here's how the problem was solved. I used woodbox Stax2 extension. This helped a lot. https://github.com/FasterXML/jackson-dataformat-xml/issues/75

TAG : java

Date : January 02 2021, 06:48 AM , By : Ivan Belov

Multiple Activity app crashes after button press

I think the issue was by ths following , You should delete the line with this.finish(). Cause finish() method quits the activity.

TAG : java

Date : January 02 2021, 06:48 AM , By : techthumb

How to read data from usb device on Android?

seems to work fine You can start with Android Developer documentation USB HOST MODE to understand how to communicate over USB.You should start with the section USB host overview.

TAG : java

Date : January 02 2021, 06:48 AM , By : user183289

correcting the return type of the method

hop of those help? Seems you want your method to return true when an object is deleted, and false when object is not found.The method you are calling is void because is uses exception ResourceNotFoundException to indicate object not found, so you nee

TAG : java

Date : January 02 2021, 06:48 AM , By : vbanos

Use spring-data-elasticsearch annotations with Jackson ObjectMapper?

I hope this helps . With Elasticsearch you can either let it define mappings automatically using Dynamic Mapping (you persist your docs and ES builds mapping according to it input), or you can define your schema prior to indexing by sending ES with r

TAG : java

Date : January 02 2021, 06:48 AM , By : vitorcoliveira

java.lang.ArrayIndexOutOfBoundsException at index "1", size "1" when I click on favorite icon

With these it helps The indices of a size 1 array are {0}, if the array were size 5 the indices would be {0, 1, 2, 3, 4}. The index of an array only goes up to its length - 1, you're trying to place an item at index 1 of an array that only has index

TAG : java

Date : January 02 2021, 06:48 AM , By : user158193

Is there a shortcut to add exceptions to a method signature in Eclipse?

hop of those help? When you hover your mouse over the statement, you will get the below popup. You just have to click on the Add throws declaration link

TAG : java

Date : January 02 2021, 06:48 AM , By : vbanos

Univocity - Detect missing column when parsing CSV

fixed the issue. Will look into that further So since my main issue here is to make sure that the headers count is the same as the number of columns provided in the CSV file, and since I'm using an iterator to iterate over records, I've added a check

TAG : java

Date : January 02 2021, 06:48 AM , By : Jeskl

Projects Directory Structures | Why?

wish helps you Main question , What's the main idea behind the structure?

TAG : java

Date : January 02 2021, 06:48 AM , By : Raghaw

Does Java monitor's wait set has a priority over entry set?

Any of those help No. The scheduler is in charge of which thread gets the lock next. It might be one from the wait set that got notified. It might be a thread that is just arrived and hasn't entered the wait set. Assuming the thread that just got not

TAG : java

Date : January 02 2021, 06:48 AM , By : Harry Truman

Is it possible to remove elements in a string array, that isn't a number, whilst in a for loop?

fixed the issue. Will look into that further I am trying to find the largest number in a string array that includes letters. How do I remove elements that aren't numeric from the array, whilst its in a For loop? , you can use Java 8 stream for this

TAG : java

Date : January 02 2021, 06:48 AM , By : tlync

"Feature not supported" error when using the method first() of ResultSet

I think the issue was by ths following , The problem is NOT that first is not supported by the database.The problem is that it is not supported for this resultset. The code for the HSQLDB JDBCResultSet::first looks like this:

TAG : java

Date : January 02 2021, 06:48 AM , By : AJacques

Error: 1553 - AQL: bind parameter '@myParameter' has an invalid value or type (while parsing) - ERROR_QUERY_BIND_PARAMET

it fixes the issue I have the following query: , Non-collection parameters require a single @

TAG : java

Date : January 02 2021, 06:48 AM , By : Bruce

I need to pass a condition as an argument

around this issue You can use a Predicate for this. A Predicate is a boolean-valued function. This way you can test against your value until the condition is met.

TAG : java

Date : January 02 2021, 06:48 AM , By : user183954

Calendar work in all the year except in July

fixed the issue. Will look into that further If you can use the actual day of the week - consider using LocalDate (Java 8+) if possible:

TAG : java

Date : January 02 2021, 06:48 AM , By : Ian

I Need to Implement Volume change Functionality + Screen Brightness Adjustment On Swipe/Movement on Screen Touch

I wish this helpful for you Volume Controladd permission android.permission.MODIFY_AUDIO_SETTINGS to your AndroidManifest.xml

TAG : java

Date : January 02 2021, 06:48 AM , By : JulianCT

What are some real uses cases for the methods skip and reset in BufferedReader?

will be helpful for those in need I haven't used them myself, but a case that springs to mind is where you want to copy the data into a structure that needs to be sized correctly.When reading streams and copying data into a target data structure (per

TAG : java

Date : January 02 2021, 06:48 AM , By : S. Fenz

Maven: "NoClassDefFoundError: com/jogamp/newt/event/KeyListener"

seems to work fine Maven does not package the dependency classes in the final .jar. Some options: Manually add the dependencies to your classpath with the -classpath flag (How to run a java class with a jar in the classpath?). Use Maven exec plugin w

TAG : java

Date : January 02 2021, 06:48 AM , By : Steve M

Is there a way to create a batch job in dataflow which reads from a pubsub topic?

I hope this helps . You can look into using BoundedReadFromUnbounded source that allows to convert unbounded collection to bounded.

TAG : java

Date : January 02 2021, 06:48 AM , By : xguru

Android Value ListView Kotlin

I wish did fix the issue. How to migrate Java to kotlin? , you could do it like this

TAG : java

Date : January 02 2021, 06:48 AM , By : qba73

@AutoConfigureWebTestClient(timeout = "600000") has no effect

Hope this helps I think that annotation does not work in your setup, since by default the timeout is already 5 seconds, how about trying the other answer of that linked question?

TAG : java

Date : January 02 2021, 06:48 AM , By : Franky

How can I start a new activity in a ScreenSlidePagerAdapter?

wish help you to fix your issue You should write the startactivity code inside last showing fragment of adapter. (If you are using instances of same fragment, then you have to pass the position from adapter to fragment while creating it.

TAG : java

Date : January 02 2021, 06:48 AM , By : George H.

how to display number without comma java

Hope this helps You can simply use String::replaceSystem.out.println (i.replace (",", ""));

TAG : java

Date : January 02 2021, 06:48 AM , By : Kocur

Adding an Admob banner to a listview every X rows

it helps some times This can be achieved in many ways. The simplest one is adding the adview inside the list item layout itself and making it visible or invisible from onBindViewHolder. You can add an additional integer variable say 'viewType' to the

TAG : java

Date : January 02 2021, 06:48 AM , By : demize95

Is there a way to find a word by searching for only part of it?

it fixes the issue I need to take a phrase that contains a specific word, then if it does have that word even if it's part of another word, to print the entire word out. , Use regex for a 1-liner:

TAG : java

Date : January 02 2021, 06:48 AM , By : Jµ.