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JAVA QUESTIONS

Flow control on blocking queue and SocketChannel write
Flow control on blocking queue and SocketChannel write
fixed the issue. Will look into that further Finally I mixed two solution to achieve what I wanted. I used bounded semaphores to limit the writers at any point of time along with timed cyclic barrier which helped me define the total writes/second.
TAG : java
Date : November 18 2020, 09:01 AM , By : hema
PageTitles for Custom ViewPager
PageTitles for Custom ViewPager
Hope this helps The following is my XML, with my PagerTitleStrip embedded into the ViewPager: , Do
TAG : java
Date : November 18 2020, 09:01 AM , By : Daniel Stiefel
Can't send POST message over Https
Can't send POST message over Https
I wish this helpful for you I recently had a similar problem. I found setRequestProperty adds to your headers, not the POST body. But the
TAG : java
Date : November 17 2020, 09:01 AM , By : Elyes
Can't do a simple data passing with an intent (Android)
Can't do a simple data passing with an intent (Android)
This might help you I dont think you have problem with passing values. While comparing you are comparing with == but you are supposed to compare with equals.
TAG : java
Date : November 17 2020, 09:01 AM , By : Tournevis
Find out if a string contains unique characters or not
Find out if a string contains unique characters or not
it helps some times The problem is that replaceFirst has as first argument a regular expression. So it plays havoc on \, ^, . and others. For that you could use:
TAG : java
Date : November 17 2020, 09:01 AM , By : Joe Alex
How to make Spring use JavaFX Application Thread in initializing Node beans?
How to make Spring use JavaFX Application Thread in initializing Node beans?
this one helps. Now I realize that most of these init() methods need JavaFX Application Thread.
TAG : java
Date : November 17 2020, 09:01 AM , By : Vuk Bundalo
will com.jcraft.jsch.ChannelSftp.get(String src,String dst) over rides the existing file?
will com.jcraft.jsch.ChannelSftp.get(String src,String dst) over rides the existing file?
With these it helps If you check the javadoc, you will see that for the get(src, dest) method the default mode is OVERWRITE, so your first file by default will be overriden by the 2nd file. The meaning of the different modes are:
TAG : java
Date : November 17 2020, 09:01 AM , By : vitkvit
How to dynamically change List items for the ListView in Android?
How to dynamically change List items for the ListView in Android?
it helps some times Assuming the number of steps is fairly small, I usually use a LinearLayout here, and add the necessary views.To do this, you simply need to add a LinearLayout to your item view to contain the steps.
TAG : java
Date : November 17 2020, 09:01 AM , By : stéphane Benoist
Pascal Triangle - Print only 'n'th line
Pascal Triangle - Print only 'n'th line
Hope this helps Change your computeRow() method to include a check for the particular line of the triangle which you wish to print. In your case, you only want to print the last line, which will occur during the last iteration of the outer for loop:
TAG : java
Date : November 17 2020, 09:01 AM , By : P.Minhas
How to make a JFrame show advanced options when a button is clicked
How to make a JFrame show advanced options when a button is clicked
This might help you If all you want to do is hide/display some swing objects based on a button press the following code should provide you with a basic template. Create all the items you will need in the initialize method -- but make the objects that
TAG : java
Date : November 17 2020, 09:01 AM , By : Neil Whitehead
Initialize value of variable while declaration
Initialize value of variable while declaration
help you fix your problem static variables are initialized in the order they appear in the source code of the class. Therefore when j is initialized, i is still 0 by default, so function1 returns 0 and j is initialized to 0.After j is initialized to
TAG : java
Date : November 17 2020, 09:01 AM , By : Sameer Korde
IvyDE unable to resolve Mule dependencies
IvyDE unable to resolve Mule dependencies
seems to work fine I am working with Apache Ivy to manage transitive dependencies. , Using your example I had a different error:
TAG : java
Date : November 17 2020, 09:01 AM , By : patrickmetz
Why to use ByteArrayInputStream rather than byte[] in Java
Why to use ByteArrayInputStream rather than byte[] in Java
seems to work fine If the input is always a byte[], then you're right, there's often no need for the stream. And if you don't need it, don't use it. One additional advantage of a ByteArrayInputStream is that it serves as a very strong indication that
TAG : java
Date : November 17 2020, 09:01 AM , By : Danmar Palacio
Count how many times pair of words appeared in java
Count how many times pair of words appeared in java
wish helps you OKay, so from the question I understand that you need to check whether a pair of words from a string has to be counted in the whole string. I see your code and felt it to be a lot more complex than required. Please see the below snippe
TAG : java
Date : November 17 2020, 09:01 AM , By : G Reiman
What are the various ways of managing multiple threads access to a single database?
What are the various ways of managing multiple threads access to a single database?
it fixes the issue Concurrency management is typically viewed as a feature of the database (and therefore its responsibility), not a problem that is dealt with in client code (in this case "client" means "client of the database"). Put another way, if
TAG : java
Date : November 17 2020, 09:01 AM , By : Ibrahim Çelikbilek
How to set loop in pig latin?
How to set loop in pig latin?
I wish this helpful for you If you're just putting everything currently in your main method inside the block of your while(true) loop, one modification you'll have to make is to initialize your Scanner before printing "enter something". Since you're
TAG : java
Date : November 17 2020, 09:01 AM , By : Jérémy
Exporting Runnable jar loses directory structure
Exporting Runnable jar loses directory structure
it helps some times I suppose that Data and lib are added to the classpath in Eclipse. When you reference their contents, you do so by their path from the classpath root. When packaging then na jar, Eclipse puts the content of each directory listed i
TAG : java
Date : November 17 2020, 09:01 AM , By : Tim Ketelaars
How do you search for a range of number using Secure Random?
How do you search for a range of number using Secure Random?
seems to work fine You can do by this operation:Random rand = new SecureRandom() // 1 to 10 inclusive. int number = rand.nextInt(10);
TAG : java
Date : November 17 2020, 09:01 AM , By : Nakols
What is the recommended way of deleting a user account from Google Identity Toolkit (Gitkit)?
What is the recommended way of deleting a user account from Google Identity Toolkit (Gitkit)?
This might help you Google Identity Toolkit Java client library provides the deleteUser() method to delete an individual user account:
TAG : java
Date : November 17 2020, 09:01 AM , By : kavita
Cannot compare user-defined objects for sorting (Java 8)
Cannot compare user-defined objects for sorting (Java 8)
wish of those help You usually get this error when the comparator violates the transitivity - check this answer. When using double in a Comparator, you should avoid using the substraction logic. Since you're converting the result into an int, it woul
TAG : java
Date : November 17 2020, 09:01 AM , By : Steve John Azzopardi
Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/hibernateContext.xml]
Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/hibernateContext.xml]
I wish this helpful for you This is your real problem java.lang.NoClassDefFoundError: org/hibernate/engine/jndi/JndiException that means you are mixing different hibernate-core and hibernate-entitymanager versions.And your pom is an evidence of your
TAG : java
Date : November 17 2020, 09:01 AM , By : Sebastian Martin
Can I use Collection.size() to replace the counter in this code?
Can I use Collection.size() to replace the counter in this code?
should help you out No, that would create a deadlock actually.You would need to synchronize put and take if you want to use size in a parallel fashion. But take is blocking and you would now have a blocking take call synchronized on the same object a
TAG : java
Date : November 17 2020, 09:01 AM , By : Arno Wath Chantao
How to convert a string into 8-bit ascii in java?
How to convert a string into 8-bit ascii in java?
I wish did fix the issue. I want to convert a string text into 8-bit ascii numbers, and try to store them in an ArrayList. , Try this complete solution to fix the problem.
TAG : java
Date : November 17 2020, 09:01 AM , By : amarulopez
Java Palindrome (Boolean Method) with iterative solution (while loop)
Java Palindrome (Boolean Method) with iterative solution (while loop)
wish of those help You are comparing values of a and b which aren't the same when you start comparing and hence you get false from your method. In your if condition, Change it to be string.charAt(a) != string.chatAt(b)
TAG : java
Date : November 17 2020, 09:01 AM , By : Aldira Putra
Get Some Attributes with JSoup
Get Some Attributes with JSoup
I wish this helpful for you I was having some practices with programming, and I got stuck (also because of my lacking knowledge of web programming) in this part: I was to get some information from this page: http://db.fowtcg.us/index.php?p=cardcode=V
TAG : java
Date : November 17 2020, 09:01 AM , By : Narendra Kumar
Showing ViewPager within a RelativeLayout (LinearLayout cannot be cast to android.widget.RelativeLayout)
Showing ViewPager within a RelativeLayout (LinearLayout cannot be cast to android.widget.RelativeLayout)
this will help My ViewPager is contained within a RelativeLayout in my listview_item.xml: , you are casting linear layout into the relative layout.you uses
TAG : java
Date : November 17 2020, 09:01 AM , By : Son Goku ssj4
Android Studio rendering problems, using it for the first time
Android Studio rendering problems, using it for the first time
wish help you to fix your issue Your activity will be extending "AppCompatActivity" which requires that an appcompat theme need to be used. You can change it to "Activity" and try other themes.
TAG : java
Date : November 17 2020, 09:01 AM , By : Swati Divakarla
Unit testing code that relies on constant values
Unit testing code that relies on constant values
I hope this helps you . As Tim alluded to in the comments, your goal is to make sure that your software behaves according to the specifications. One such specification might be that the maximum length is always 10, at which point it'd be unnecessary
TAG : java
Date : November 16 2020, 09:01 AM , By : Tareq Ahmed
index 1000 is out of bounds for axis 0 with size 1000
index 1000 is out of bounds for axis 0 with size 1000
it fixes the issue An array's maximum index should be one less than the size. In this case, as the array size is 1000, the maximum value for the index should be 999(which will be referring to the 1000th element.)If you need the 1001st element, ensure
TAG : java
Date : November 16 2020, 09:01 AM , By : Satria Pito
Timestamping Using Date Class Java
Timestamping Using Date Class Java
Hope this helps You created timeNow outside of the while loop. The time for this object is captured at construction time. When you move it within the scope of the while loop, you'll get a new object every time which represents the time it was created
TAG : java
Date : November 16 2020, 09:01 AM , By : Mujtaba Gul
Is there a default thread pool in java
Is there a default thread pool in java
With these it helps Using separate threadpools is good, default practice, and sharing threadpools is a (possibly premature) optimization.Through Java 7 the answer is no, there is not a default threadpool, and the recommendation is to have many thread
TAG : java
Date : November 16 2020, 09:01 AM , By : George Burnett
How to register objects of classes implementing the same interface
How to register objects of classes implementing the same interface
fixed the issue. Will look into that further So I recently solved this problem myself using spring. Here is the solutionFirst, refactor the Mapper interface as:-
TAG : java
Date : November 16 2020, 09:01 AM , By : Crucidal
android: Go Back To Main Activity Without Losing It's Data
android: Go Back To Main Activity Without Losing It's Data
I wish this help you You can use Bundle to send the data between 2 activity. Step 1: Add data into the bundle and send it
TAG : java
Date : November 16 2020, 09:01 AM , By : Eshaan Dil Logical
Select element that's before the element containing certain linkText
Select element that's before the element containing certain linkText
wish helps you You can use the following-sibling axis:
TAG : java
Date : November 16 2020, 09:01 AM , By : Meta Augu
How can you update a checkbox in a MenuItem dynamically?
How can you update a checkbox in a MenuItem dynamically?
may help you . The problem is explained as follow: When you call invalidateOptionsMenu(), it will reset to default menu. So nothing happened.
TAG : java
Date : November 16 2020, 09:01 AM , By : RAGHAVA RAMA SRIPAD
Cannot exit the loop using || operator
Cannot exit the loop using || operator
will help you By using AND, you're saying "if one is zero, exit the loop." If you use OR, you're saying "if both are zero, exit the loop". It's opposite what you think it is, and that's why you might be confused. When you negate boolean operators lik
TAG : java
Date : November 16 2020, 09:01 AM , By : Edward
Can I Call An AngularJS Function From Selenium
Can I Call An AngularJS Function From Selenium
I wish this helpful for you I'm pretty sure you can still find an input with type="file" in your DOM.Let's take a look at an example Angular File Upload DEMO page. There is a ng-file-upload div that you can drag and drop files onto, but, if you would
TAG : java
Date : November 16 2020, 09:01 AM , By : Apex Virgo
How to get tweets of a specific user using twitter4j
How to get tweets of a specific user using twitter4j
I hope this helps . sample Implementation of twitter4j for user tweets here. You need to pass the user name as command line parameter while running the program . I don't see any other issue with this code
TAG : java
Date : November 16 2020, 09:01 AM , By : PaWoN
Dropwizard, Scribejava, Oauth 2.0 and Github
Dropwizard, Scribejava, Oauth 2.0 and Github
around this issue Was actually a very simple bug, I wasn't pulling the correct param from the response URL in the callback method. Complete working example:
TAG : java
Date : November 16 2020, 09:01 AM , By : Karthikeyan Bose
DecimalFormat not rounding to two decimal places correctly
DecimalFormat not rounding to two decimal places correctly
I think the issue was by ths following , Your assumption about the value calculated in ((price-base_price)/price)*100.00D is incorrect (I think you've probably invoked integer math, try ((price-base_price)/(double)price)*100.00D). When I directly exe
TAG : java
Date : November 16 2020, 09:01 AM , By : Wilson Xavier
Android - Adding views to an array using a for loops
Android - Adding views to an array using a for loops
Any of those help Yes, it is possible to get a resource in a loop. Here is an example from a Sudoku app I put together (the TextViews have names of the form "tv32"):
TAG : java
Date : November 16 2020, 09:01 AM , By : NorouziFar
Certificates and keys work with openssl; why don't they work with JSSE in jks keystores?
Certificates and keys work with openssl; why don't they work with JSSE in jks keystores?
help you fix your problem I've been given 3 files: MY.cer, MY.key, B.pem (root,intermediate certs). Using openssl I get a successful connection: , The problem is entirely in the way the keystores were created.
TAG : java
Date : November 16 2020, 09:01 AM , By : user4574570
I want to use an object in my ActionListener Class
I want to use an object in my ActionListener Class
fixed the issue. Will look into that further I'm not sure what you're exact situation is, but maybe you need to make your constructor for Play accept a Deck as an argument:
TAG : java
Date : November 16 2020, 09:01 AM , By : 송희래
How do servlet/grails correctly serve mp4 files to Safari?
How do servlet/grails correctly serve mp4 files to Safari?
it should still fix some issue For anyone who is interested (or bogged down) in this question , I've found the solution. It's not a simple solution.The solution is in this URL : FileServlet supporting resume and caching and GZIP
TAG : java
Date : November 16 2020, 09:01 AM , By : Bhagvan Parge
How to find the last word in a String in Java?
How to find the last word in a String in Java?
hop of those help? How can I find the last word of a string? I am not trying to find a fixed word, in other words, I would not know what the last word is, however I want to retrieve it. , Here is my code:
TAG : java
Date : November 16 2020, 09:01 AM , By : JP6
Trying to extend an EJB from a Generic Class: IllegalArgumentException The Argument {0} is not a valid local client view
Trying to extend an EJB from a Generic Class: IllegalArgumentException The Argument {0} is not a valid local client view
like below fixes the issue Installing patch 19533331 solved the issue for me.19533331 Dependency injection 12.1.3.0.3 CDI does not consider all superclasses and interfaces of an EJB when processing EJBs.
TAG : java
Date : November 16 2020, 09:01 AM , By : Abbey lane
Need to search object elements in a LinkedList
Need to search object elements in a LinkedList
wish help you to fix your issue I am working on a program which will store objects in a LinkedList, and then search for specific objects in the list by searching the fields of said objects to match them and create prices, but I cannot figure out how
TAG : java
Date : November 15 2020, 09:01 AM , By : 007
Account Balance doesnt update - thread synchronization Java
Account Balance doesnt update - thread synchronization Java
Does that help There are multiple problems with your code, first of which is that your testing code will never interweave, as I suspect you wish it to.Consider the following code:
TAG : java
Date : November 15 2020, 09:01 AM , By : Ben
How to stop runnable from within program
How to stop runnable from within program
wish of those help It's because you are calling checkTemp() and remove the callbacks, then immediately post the shrink object again when checkTemp() returns.
TAG : java
Date : November 15 2020, 09:01 AM , By : Sohail Siddiqi
Looking for examples on how to use spring-data RedisZSetCommands.zRangeByLex
Looking for examples on how to use spring-data RedisZSetCommands.zRangeByLex
I hope this helps . Support for ZRANGEBYLEX directly via ZSetOperations and RedisZSet is still an open issue. Though it is possible using RedisCallback.
TAG : java
Date : November 15 2020, 09:01 AM , By : Adam
Issues solving Project Euler #4
Issues solving Project Euler #4
To fix this issue The problem reads , Here is code that should work for you.
TAG : java
Date : November 15 2020, 09:01 AM , By : MAYANK PARNAMI
Using Math.pow in Java to determine surface area of a cube AND also a difficulty with 'skipping'
Using Math.pow in Java to determine surface area of a cube AND also a difficulty with 'skipping'
it should still fix some issue Your code is incorrect, Math.pow(base, exponent) expects 2 parameters :-
TAG : java
Date : November 15 2020, 09:01 AM , By : stefasir
How to draw a random color from a color array list and apply it to the backgrounds of buttons from another array list?
How to draw a random color from a color array list and apply it to the backgrounds of buttons from another array list?
I hope this helps you . So, you need to break your requirements down...First you need to build the button for each character...
TAG : java
Date : November 15 2020, 09:01 AM , By : Dora Oprea
What is the difference between Collections.sort() and other traditional sorting algorithms?
What is the difference between Collections.sort() and other traditional sorting algorithms?
I hope this helps . The sorting methods built into the Java standard libraries should be used for the vast majority of cases. They are general purpose, efficient and reliable. There are rare instances when a custom sorting mechanism is required. An e
TAG : java
Date : November 15 2020, 09:01 AM , By : toggm
Java ScrollPane (with a TextArea inside) can not scroll to top programmatically
Java ScrollPane (with a TextArea inside) can not scroll to top programmatically
Any of those help A simple solution might be to use JTextAreasetCaretPosition, for example
TAG : java
Date : November 15 2020, 09:01 AM , By : Chai Vornes
Drag and Drop a shape in Java awt applet
Drag and Drop a shape in Java awt applet
I wish this helpful for you I think the problem is that you're setting the rectangle's position to the mouse's pointer position and when you try to drag the rectangle up or to the left, the pointer will be outside of the rectangle's bounds and clicke
TAG : java
Date : November 15 2020, 09:01 AM , By : chandni dixit
Trying to sort a Java array of objects
Trying to sort a Java array of objects
I wish this help you I am fairly new to Java (C++ and C are my usual languages) , Cake walk. Did some simplification and cleaning up.
TAG : java
Date : November 15 2020, 09:01 AM , By : rama krishna
Getting wrong MAC address of Nexus 6P in app code
Getting wrong MAC address of Nexus 6P in app code
wish help you to fix your issue If your device running Marshmallow (API 23 or above) then you can not get the mac address of the device. This security feature has been added starting Marshmallow, hence it returns some constant value like 02:00:00:00:
TAG : java
Date : November 15 2020, 09:01 AM , By : Rajesh
Trigonometric functions in JPA
Trigonometric functions in JPA
around this issue JPQL does NOT support those trig functions (JDO does FWIW). Some implementations may have support for them as vendor extensions. I know that DataNucleus JPA does, but others may too.Alternatively use JPQL standard, with (long winded
TAG : java
Date : November 15 2020, 09:01 AM , By : Mike Hsu
Unchecked cast to generic class implementing Map<String, V>
Unchecked cast to generic class implementing Map<String, V>
Hope that helps The behavior is as specified. In Section 5.5.2 of the Java Language Specification an unchecked cast is defined as:
TAG : java
Date : November 15 2020, 09:01 AM , By : Fabio Goncalves

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