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JAVA QUESTIONS

How do I replace below for loop code with Java 8 streams
How do I replace below for loop code with Java 8 streams
I think the issue was by ths following , In the below code i am trying to create a Set based on some conditions. I want to use java 8 streams and replace this code involving for loops. Any code example/sample will be much appreciated. , I would like
TAG : java
Date : September 03 2020, 07:00 PM , By : Joana Santos
Generic annotation of arrays in Java
Generic annotation of arrays in Java
wish of those help I find this snippet of code in twitter, it is hard to me to understand what happens here, all I can see that the OP of this code is creating an annotation, I can see also that the OP use array of arrays in this code, and also use g
TAG : java
Date : September 03 2020, 04:00 PM , By : Tim
JNI cannot find class in signed JAR since JRE 8u232
JNI cannot find class in signed JAR since JRE 8u232
To fix this issue The LogManager documentation suggests .handlers is invalid because it is missing the logger specifier:
TAG : java
Date : September 03 2020, 03:00 PM , By : Toby Privett
Why would Java skip lines of code after method failure?
Why would Java skip lines of code after method failure?
this one helps. Hopefully you're clear on why method3() is not executing.A possible reason that method4() would not execute is that method is throwing a Throwable that is not a subclass of Exception - most likely some kind of Error.
TAG : java
Date : September 03 2020, 02:00 PM , By : Mountainview
How do I solve Wicket Error: Unable to find resource
How do I solve Wicket Error: Unable to find resource
will be helpful for those in need A ResourceModel is used for internationalization, so it's looking for an entry in one of your resource bundles with the name instructions, but can't find it.Resource bundles follow the same naming conventions as your
TAG : java
Date : September 03 2020, 12:00 PM , By : Ahmed Affan
Multiple Generics in a method
Multiple Generics in a method
I hope this helps . The code does not compile because Dagger does not implement Ranged.I think you mean Melee or Ranged. This could be written as overloads.
TAG : java
Date : September 03 2020, 10:00 AM , By : pdu
Is it possible to reduce redundancy between these two methods?
Is it possible to reduce redundancy between these two methods?
I hope this helps you . Yes, you could use Map instead of all the conversions you're doing there.
TAG : java
Date : September 03 2020, 09:00 AM , By : pyxozjhi
How to import zebra package in android studio?
How to import zebra package in android studio?
hope this fix your issue you need to add dependency of zebra sdk follow below steps Download this jar file https://github.com/luisamilcarr/zebra_zq510/raw/master/app/libs/ZSDK_ANDROID_API.jar Cut and copy this jar file from download folder to android
TAG : java
Date : September 03 2020, 07:00 AM , By : ash
Have to write a program that gives me the sum of even numbers without using if statements nor loops nor array how should
Have to write a program that gives me the sum of even numbers without using if statements nor loops nor array how should
like below fixes the issue I want to write a program that makes the user enter 3 integers num1,num2,num3 and give me the sum of the even numbers entered and the average of the even numbers without using if statements/loop/arrays I'm stuck can't figur
TAG : java
Date : September 03 2020, 07:00 AM , By : Janakiraman M
Exception : java.lang.ClassNotFoundException:com.fasterxml.jackson.core.exc.InputCoercionException
Exception : java.lang.ClassNotFoundException:com.fasterxml.jackson.core.exc.InputCoercionException
Does that help I am working on Java Springboot project which is deployed on Weblogic (12C) I am getting below error: Message icon - Error java.lang.ClassNotFoundException:com.fasterxml.jackson.core.exc.InputCoercionException , Add the following depen
TAG : java
Date : September 03 2020, 05:00 AM , By : Travis N George
Can Android Application run without Android Runtime as implied in official android stack?
Can Android Application run without Android Runtime as implied in official android stack?
I wish did fix the issue. I've been doubted that it is not possible. However, If you decompile an apk to smali, you will see that smali is a more easily read java byte code. Convert smali from an apk to java source code and you have ART's java transl
TAG : java
Date : September 03 2020, 04:00 AM , By : TheC
Is there a way I can check detect a repeated input for a hashset (Java)?
Is there a way I can check detect a repeated input for a hashset (Java)?
I wish this helpful for you The add API would return false for an existing value(that it cannot add to the Set), so your condition can be dealt with
TAG : java
Date : September 03 2020, 03:00 AM , By : djt1804
What is a difference between ::class and ::class.java in Kotlin?
What is a difference between ::class and ::class.java in Kotlin?
I hope this helps . By using ::class, you get an instance of KClass. It is Kotlin Reflection API, that can handle Kotlin features like properties, data classes, etc.By using ::class.java, you get an instance of Class. It is Java Reflection API, that
TAG : java
Date : September 03 2020, 01:00 AM , By : Yura
How can Java stream reduce accumulator parameter be associative
How can Java stream reduce accumulator parameter be associative
hope this fix your issue Mind the documentation:
TAG : java
Date : September 03 2020, 12:00 AM , By : Sidhhantaga
How to play a YouTube video in a fragment in Android?
How to play a YouTube video in a fragment in Android?
Does that help I am creating an app on api29 and trying to implement different kinds of fragments. I have a : , how to proceed and where to actually code
TAG : java
Date : September 03 2020, 12:00 AM , By : Siddhartha Jangam
Single quote in error message of text field Wicket
Single quote in error message of text field Wicket
around this issue You can define your own feedback messages using Wicket's internationalization support. Let's say your field is defined in a Java file named MyPage.java, then you'd need a MyPage.properties.Let's say your HTML looks like this (simpli
TAG : java
Date : September 02 2020, 11:00 PM , By : Murat Aslan
Is there any way to return default values in Kotlin Data Class when using Moshi when the API return null values through
Is there any way to return default values in Kotlin Data Class when using Moshi when the API return null values through
this one helps. Make the data class entries non-nullable (remove the ?)Then put in every place that you invoke the constructor, ?: "". Anything that is null will be changed to an empty string
TAG : java
Date : September 02 2020, 09:00 PM , By : CantStumpTheTrump
Detect onLongPress and onClick event in onTouchListener
Detect onLongPress and onClick event in onTouchListener
hope this fix your issue Depends on your use case. If there is a reason you can't just use setOnLongClickListener(), I'd suggest using a GestureDetector instead. https://developer.android.com/training/gestures/detector
TAG : java
Date : September 02 2020, 07:00 PM , By : Serg
How to get source class of static[] array
How to get source class of static[] array
should help you out Use ClassgetComponentType():
TAG : java
Date : September 02 2020, 05:00 PM , By : Youssouf TRAORE
Take every nth. element out of an Array of Objects using streams
Take every nth. element out of an Array of Objects using streams
will help you I am trying to solve little easy exercises with streams and I was wondering which way is the most efficient way to get a stream out of an Person[] but taking every second object.
TAG : java
Date : September 02 2020, 11:00 AM , By : Ajay kumar
UnsupportedFormatException: No suitable ImageReader found for source data
UnsupportedFormatException: No suitable ImageReader found for source data
I hope this helps you . I'm using java code to create a thumbnail image for all types of uploading images with a fixed size 250x250. And it is working for all the types of images except "jpeg" images. On trying with jpeg images, the code returns an e
TAG : java
Date : September 02 2020, 09:00 AM , By : Bashid Vetapalem
Disable thrift in Cassandra 3.x
Disable thrift in Cassandra 3.x
I hope this helps . In Cassandra 3 Thrift is disabled by default, so your best bet is to leave it just like this:
TAG : java
Date : September 02 2020, 07:00 AM , By : Michael Beilles
My sorting algorithm says :Your code did not execute within the time limits. how to solve this problem
My sorting algorithm says :Your code did not execute within the time limits. how to solve this problem
I think the issue was by ths following , For competitive programming problems like this, before you even start writing any code, you should think about the input sizes you have to deal with and what time complexity your algorithm needs. For HackerRan
TAG : java
Date : September 02 2020, 07:00 AM , By : Dushyant Sharma
Why cant i register a non-regular type Arraylist<> into an ArrayList<>?
Why cant i register a non-regular type Arraylist<> into an ArrayList<>?
fixed the issue. Will look into that further Your Square class is throwing a NullPointerException on your ArrayList actions because you havent initialized it yet. You can add this line:
TAG : java
Date : September 02 2020, 07:00 AM , By : Armando Torres
Safe get value from chain without NPE
Safe get value from chain without NPE
wish of those help Does anyone know any solution to safely get value without NPE and without a lot of if statements? For example, we have: userInfo.getAddressInfo().getCityName(), how to get cityName without null-checks? , I'm looking for a solution
TAG : java
Date : September 02 2020, 04:00 AM , By : johnwendy
How to get low level access to JavaFX chart so an image can be drawn?
How to get low level access to JavaFX chart so an image can be drawn?
To fix this issue The charts in the javafx.scene.chart package don't use a Canvas to draw the charts. They instead use the scene graph. In your question you're creating an image on the fly, but assuming you have an already-created image, possibly as
TAG : java
Date : September 01 2020, 05:00 PM , By : Jonas Kihlström
Repeated array elements
Repeated array elements
it fixes the issue When an element occurs very frequently in a sequence, it is useful to consider the fact that if more than 50% of the elements are equal, then there must be two adjacent occurrences of it. If we were guaranteed that N+1 of the eleme
TAG : java
Date : September 01 2020, 04:00 PM , By : maelito
How can I use a Java class file from a different directory?
How can I use a Java class file from a different directory?
it helps some times You can make that class a dependency using something like Maven: https://maven.apache.org/OR
TAG : java
Date : September 01 2020, 12:00 PM , By : user6099186
How to Reading 10 integers from user, and identifying second highest without using arrays?
How to Reading 10 integers from user, and identifying second highest without using arrays?
I think the issue was by ths following , , You can do it as follows:
TAG : java
Date : September 01 2020, 10:00 AM , By : Wojciech Bobiatyński
How do I extend a named Spring bean when using a @Qualifier specified bean injection point?
How do I extend a named Spring bean when using a @Qualifier specified bean injection point?
I wish did fix the issue. If this is possible, you can change the way the beans are created by removing the @Component annotations:In the first project, the BeanChild3 would be refactored to get the bean in the constructor
TAG : java
Date : September 01 2020, 03:00 AM , By : sguiggly
Calling a subclass constructor with a variable affecting the super constructor
Calling a subclass constructor with a variable affecting the super constructor
will help you once you pass a value, you pass it. updating the value later doesn't affect what you gave it to before. Easy fix, though:
TAG : java
Date : September 01 2020, 03:00 AM , By : Ivan Teitsson
Generating a PDF with custom size in android with PdfDocument
Generating a PDF with custom size in android with PdfDocument
it fixes the issue Have a look at this question render view off-screen in android.In Android the measurements for a view are given by the parent layout. This means you can create a new layout with your desired measurements and inflate your view with
TAG : java
Date : September 01 2020, 03:00 AM , By : Daniele Capasso Barb
Understanding the C# “async/await” pattern by Java developer
Understanding the C# “async/await” pattern by Java developer
hope this fix your issue I am coming from a Java development environment and has started to code in C. I have noticed the ‘async/await’ pattern in C that I have never seen in Java. What is it exactly? I have browsed internet for a while and can’t fin
TAG : java
Date : September 01 2020, 01:00 AM , By : Gangmuk
Why does book say final is needed here?
Why does book say final is needed here?
around this issue It's very likely that the book (or chapter/section) was written before the Java 8 age.Java imposes a limitation on anonymous classes, which may not access a local variable unless it's final.
TAG : java
Date : September 01 2020, 12:00 AM , By : sid
Isnt using a method of a seperate class considered abstraction
Isnt using a method of a seperate class considered abstraction
hop of those help? When calling a method from another class is it considered abstraction?
TAG : java
Date : August 31 2020, 10:00 PM , By : gracy_yang
How does RandomAccess interface works internally?
How does RandomAccess interface works internally?
wish of those help Your understanding is wrong. RandomAccess may provide a promise but it doesn’t provide any ability. Providing the ability is up to the implementing class. Actually RandomAccess doesn’t “work internally” in any sense of the expressi
TAG : java
Date : August 31 2020, 09:00 PM , By : pooja
Image won't appear on JLabel. Tried multiple solutions
Image won't appear on JLabel. Tried multiple solutions
With these it helps The ImageIcon constructor you're using takes a file path as an argument. For your code to work, you would thus have to pass an absolute file path, because relative ones are resolved based on the current directory, not based on the
TAG : java
Date : August 31 2020, 07:00 PM , By : Pravin Shende
Mockito cannot find defined class while running a test
Mockito cannot find defined class while running a test
like below fixes the issue Your are missing JavaAssist jar download below jars and add them into your projects or add them in maven pom.xml file.
TAG : java
Date : August 31 2020, 06:00 PM , By : Zhida ZHANG
Optimal Algorithm to find Anagrams of a string in another string
Optimal Algorithm to find Anagrams of a string in another string
it fixes the issue This algorithm runs in linear time. If you are preparing for an interview, then you can probably find out what is going on here by yourself ;)
TAG : java
Date : August 31 2020, 05:00 PM , By : Eric Sornson
JavaFX FXMLLoader cannot locate file
JavaFX FXMLLoader cannot locate file
Does that help Your project structure is a complete mess, I would start by cleaning this up. You should not store your classes and fxmls in the same folder. It should more or less looke like this:
TAG : java
Date : August 31 2020, 04:00 PM , By : general.paulinski
How to create a constructor that takes an array parameter and initialise the values in an underlying array?
How to create a constructor that takes an array parameter and initialise the values in an underlying array?
around this issue How to create a constructor that takes an array parameter and initialize the values in an underlying array in Java? , The code works, but there is no need of generics in your case
TAG : java
Date : August 31 2020, 03:00 PM , By : The LegitimateGamer
finding the most popular word in a person's tweets
finding the most popular word in a person's tweets
it fixes the issue In a project, I'm trying to query the tweets of a particular user's handle and find the most common word in the user's tweets and also return the frequency of that most common word. , It can be more simple if you use stream like so
TAG : java
Date : August 31 2020, 01:00 PM , By : Temko Komissarov
Trying to create a program that simulates rolling 500 dice and showing the number of ones, twos, uptill sixs, in the for
Trying to create a program that simulates rolling 500 dice and showing the number of ones, twos, uptill sixs, in the for
fixed the issue. Will look into that further You get the same numbers because you set the same seed to Random instance. Generate random seed by, for example, Math.random() or don't set the seed at all.To print stars, you can just use loop and print s
TAG : java
Date : August 31 2020, 11:00 AM , By : nana
How to replace single quote within a string with two single quotes in java?
How to replace single quote within a string with two single quotes in java?
Hope this helps As was suggested by @AndyTurner, you can simplify the problem by first replacing all ' with '' and then replace all " with '. The only thing missing after that are the parenthesis, which can be added in two steps: Replace all blanks w
TAG : java
Date : August 31 2020, 10:00 AM , By : Docter60
I'm trying to test the parametrized construtor and the toString and it won't work
I'm trying to test the parametrized construtor and the toString and it won't work
Hope this helps I need to test the parametrized constructor and I don't understand the problem why it won't work. I have error in the main method , Add to your class this code:
TAG : java
Date : August 31 2020, 08:00 AM , By : Affa
Implementing Oauth2 Authorization Code Grant flow Manually
Implementing Oauth2 Authorization Code Grant flow Manually
I wish did fix the issue. First of allDo not, i repeat do NOT ever try to implement some form of custom security by yourself.
TAG : java
Date : August 31 2020, 07:00 AM , By : India
How do I resolve wrong output error in java aggregation?
How do I resolve wrong output error in java aggregation?
help you fix your problem My code is working fine, but in the output, both employees are having same address. Why is it happening so and how can I resolve it? , The problem is the static variables in address:
TAG : java
Date : August 31 2020, 06:00 AM , By : Manaf
Excluding Logback dependency from spring-boot-starter-web stops log4j system from initialising properly
Excluding Logback dependency from spring-boot-starter-web stops log4j system from initialising properly
I hope this helps you . Why do you think that logback is a dependency? Logback directly implements slf4j, you use logback through the sl4j api so your code will never depend on logback, but it may depend on slf4j.
TAG : java
Date : August 31 2020, 04:00 AM , By : Ainkaran Ratnasingam
spring boot application.properties files does not autocomplete the code
spring boot application.properties files does not autocomplete the code
I wish did fix the issue. I've created a spring project in IntelliJ IDE with Spring Initializr. When I tried to modify the application.properties file, I realized that it does not autocomplete the code, I mean, it does not show the options like when
TAG : java
Date : August 31 2020, 03:00 AM , By : Bassel Ezzedine
getClass().getResource is pre apend the workin directory
getClass().getResource is pre apend the workin directory
Hope this helps The problem is not Class.getResource(). The problem is your code treating a resoure inside a jar file as if it was a file on the file system. It's not.
TAG : java
Date : August 31 2020, 12:00 AM , By : Sayantsi
Where to set RecycleView setAdapter for fast loading of images?
Where to set RecycleView setAdapter for fast loading of images?
like below fixes the issue As your response is an array of URLs then you should set adapter to RecyclerView only when entire data (URLs) is ready. To load images from URL on RecyclerView item use some background thread or you can try Picasso
TAG : java
Date : August 30 2020, 03:00 PM , By : Sanjida
The method strip() is undefined for the type String
The method strip() is undefined for the type String
this one helps. strip() is Java 11 functionality. Either upgrade your version or use trim() in older versions.
TAG : java
Date : August 30 2020, 10:00 AM , By : afarouk-codes
java method overloading seems unclear
java method overloading seems unclear
wish of those help I am not sure if this is a correct way to use method overloading or there is a nicer/good other logic. I have those 4 cases which can be happened. Is there a limit for the methods count? , Is there a limit for the methods count
TAG : java
Date : August 30 2020, 05:00 AM , By : sbriet
HttpUrl queryParameters into MultiValuedMap<String, String>
HttpUrl queryParameters into MultiValuedMap<String, String>
wish help you to fix your issue I am trying to populate the query params of HttpUrl into MultiValuedMap. , MultiValueMap can be easily constructed as below
TAG : java
Date : August 30 2020, 01:00 AM , By : Seven
The toolbar hides no matter which RecyclerView scrolls
The toolbar hides no matter which RecyclerView scrolls
around this issue Please use the third flag - snap, to layout_scrollFlags property. It will fix your issue.
TAG : java
Date : August 30 2020, 12:00 AM , By : jorel
Set UpdatedTimeStamp in a particular TimeZone in Spring Boot Hibernate for Postgres
Set UpdatedTimeStamp in a particular TimeZone in Spring Boot Hibernate for Postgres
To fix the issue you can do Avoid using Date, JPA supports the java-8 date classes, so use OffsetDateTime to map TIMESTAMP WITH TIME ZONEMapping Java 8 Date Types
TAG : java
Date : August 29 2020, 03:00 PM , By : Muhammad Razzaq
How to write java classes representing json object with subobjects?
How to write java classes representing json object with subobjects?
this one helps. Everything inside a pair of curly brackets can be seen as a java object. If you have square brackets then that means that you have a list and the simple properties are basic objects like strings, ints and so on.So, for example:
TAG : java
Date : August 29 2020, 02:00 PM , By : Justin
Merge numbers at same level
Merge numbers at same level
it should still fix some issue After all possible merging, you're left with at most one of each number. If you do all the merges as soon as you can while processing the list, you can use a set to keep track of which numbers you have, leading to a sim
TAG : java
Date : August 29 2020, 10:00 AM , By : XYxXT
Problem with adjusting health in Pokemon class
Problem with adjusting health in Pokemon class
this will help I have two classes called Pokemon.java and Move.java which contain methods for creating and modifying Pokemon and their moves. I've created all of the required methods, but I'm having trouble with the attack method, which is supposed t
TAG : java
Date : August 29 2020, 09:00 AM , By : vhatzi
How to single out which Java class definition is missing/which dependencies to import?
How to single out which Java class definition is missing/which dependencies to import?
it fixes the issue The failure is due to the runtime dependency on org.apache.http.HttpRequest. Whenever there is a class not found exception I would start with finding in which library that class exists. The org.apache.http.HttpRequest class is in t
TAG : java
Date : August 29 2020, 12:00 AM , By : MasterStar

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