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JAVA QUESTIONS

Gwt custom text box having baloon popup
Gwt custom text box having baloon popup
seems to work fine You should implement your own "composite". To "compose" a "balloon"/tooltip with the inputs of your form.Here is an example of the ui.xml for a text area using Gwt-bootstrap. (Doing the same in plain GWT is straightforward, if not,
TAG : java
Date : November 25 2020, 07:27 PM , By : mikif70
How to change date dynamically for each element in an Array
How to change date dynamically for each element in an Array
I hope this helps . Hi I have asked same type of question but here i am asking with more information to avoid confusion. , You could do a string replaceAll to swap in the date.
TAG : java
Date : November 25 2020, 07:22 PM , By : Dillon Murphy
JPanel won't add the JLabel text?
JPanel won't add the JLabel text?
will help you You haven't called setLabels();. You might have to change the following method into:
TAG : java
Date : November 25 2020, 07:22 PM , By : Nazim Khan
how to access the .properties file in ant if it is in different location
how to access the .properties file in ant if it is in different location
Any of those help , It can be done by giving in two ways
TAG : java
Date : November 25 2020, 07:22 PM , By : Jonathan Tecwyn
Reduce application memory footprint
Reduce application memory footprint
Hope this helps If the strings are repeated often, have natural language frequences, do not use new object instances for the same string.
TAG : java
Date : November 25 2020, 07:22 PM , By : Dean Mackenzie
java.lang.ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session
java.lang.ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session
help you fix your problem This problem occurs in the server because the lib of Tomcat and you application both have their own copy of mail.jar (in WEB-INF/lib), so the classloaders can load two different Session.If you delete the mail.jarfrom your ap
TAG : java
Date : November 25 2020, 07:22 PM , By : Codar
What is the exact purpose of calling System.exit() in java
What is the exact purpose of calling System.exit() in java
Hope that helps If I use system exit, what will happened to the created objects,variable and ect. Are everything get destroyed once I called system.exit?
TAG : java
Date : November 25 2020, 07:22 PM , By : Matthias Krause
How to do you get output from Javascript into Java using ScriptEngine
How to do you get output from Javascript into Java using ScriptEngine
this one helps. To answer you original question, you get back whatever you "return" at the end of the script. If you do not have a specific "return" statement then by default you get back the result from the last action (which in your case is the las
TAG : java
Date : November 25 2020, 07:22 PM , By : pawiromitchel96
Java replaceAll() method to escape special characters
Java replaceAll() method to escape special characters
will help you You'll have to go one-by-one, since the new-line character x000A; has nothing to do with the two-character escape sequence \n:
TAG : java
Date : November 25 2020, 07:22 PM , By : Titus Si Andreea
Java (Removing a 'keyword' from the alphabet)
Java (Removing a 'keyword' from the alphabet)
Hope that helps so I want to remove modifiedKeyword from the alphabet (PLAIN_ALPHA used as the constant)
TAG : java
Date : November 25 2020, 07:22 PM , By : Daan
Format BigDecimal in Spring
Format BigDecimal in Spring
fixed the issue. Will look into that further You can use the JSTL format taglib to format the display of a BigDecimal.To format a BigDecimal include a Product as an attribute and reference the price field via the instance of Product using JSP EL.
TAG : java
Date : November 25 2020, 07:22 PM , By : sneha
iterating checkbox values stored in array using EL
iterating checkbox values stored in array using EL
wish help you to fix your issue I have a jsp page wherein there a list of links of employees..when the user clicks on a link, associated emp_id would get fired to the database and the emps details would get displayed in the final view page. , For eac
TAG : java
Date : November 25 2020, 07:22 PM , By : Teodor Onisor
Java - Jackcess API with .accde(MS Access) format
Java - Jackcess API with .accde(MS Access) format
Hope that helps I just gave a try using the same(above) code by changing from accdb to accde format, its working.
TAG : java
Date : November 25 2020, 07:22 PM , By : Gartenzwerg
Alternative for some of Struts 1 methods in Struts 2
Alternative for some of Struts 1 methods in Struts 2
Any of those help You should use Struts2 Result implementation instead of using servlet stuff directly until you know what are you doing. There's redirect or redirectAction, and dispatcher result types that should be used instead of direct servlet AP
TAG : java
Date : November 25 2020, 07:22 PM , By : Sifiso Nkwanyana
javax.crypto JDK source code, again
javax.crypto JDK source code, again
it helps some times The sources are available over Mercurial. For example, the sources for jdk8-b132's javax.crypto are here.Notice that if you are suspecting a backdoor, you have no (easy) way to verify that those sources are actually the sources of
TAG : java
Date : November 25 2020, 07:22 PM , By : Annakkili C
Spring Roo - Command 'service' not found
Spring Roo - Command 'service' not found
I hope this helps . While following "Spring in Action" I encountered the same problem with Roo 1.2.4.Try using roo> service type instead of just roo> service.
TAG : java
Date : November 25 2020, 07:22 PM , By : Harjot Singh
antlr4: ATN version 2 expected 3
antlr4: ATN version 2 expected 3
it helps some times Your parser was generated with ANTLR 4.0, but you are trying to execute it with ANTLR 4.1. The most likely cause of this is using ANTLRWorks 2.0 to generate the parser, which internally uses ANTLR 4.0. I'm in the process of releas
TAG : java
Date : November 25 2020, 07:22 PM , By : sharjeel ahmad
Deploy GlassFish using Netbeans generate java.net.MalformedURLException: Bad URL path
Deploy GlassFish using Netbeans generate java.net.MalformedURLException: Bad URL path
should help you out Simply go to path of the server source \glassfish4\glassfish\domains\domain1\config\domain.xmlthen under the tag
TAG : java
Date : November 25 2020, 07:22 PM , By : Chris Dask
why is wait() called for loop in Thread.join() of Java?
why is wait() called for loop in Thread.join() of Java?
Hope that helps t.join() must not return until the thread has terminated. But just because the wait() call returns, that does not mean that the thread is terminated. The method keeps looping until isAlive() returns false.NOTE: One reason why wait() c
TAG : java
Date : November 25 2020, 07:06 PM , By : Sophia He
Java JAXB marshall into DOM Document
Java JAXB marshall into DOM Document
wish helps you You can create wrapper element for collections using @XmlElementWrapper:
TAG : java
Date : November 25 2020, 07:06 PM , By : skwony
Why JDBI 3 @ColumnName annotation doesn't work?
Why JDBI 3 @ColumnName annotation doesn't work?
around this issue Jdbi maintainer here. Four misunderstandings are conspiring to make your code not work:First, @ColumnName defines a one-way mapping used only for mapping column names to object properties/fields/constructor parameters. So BeanMapper
TAG : java
Date : November 25 2020, 07:06 PM , By : Eddie Velez
Java SimpleDateformatter with 10 decimals after the seconds, cannot convert to Date
Java SimpleDateformatter with 10 decimals after the seconds, cannot convert to Date
Hope this helps There are multiple problems at the moment. I'd strongly recommend using java.time for as much work as possible, although even that doesn't make this easy.As you say, your value has 10 digits for "fraction of a second" - which means it
TAG : java
Date : November 25 2020, 07:06 PM , By : Chin Chan Soy
Getting array index out of bounds when splitting a string in android
Getting array index out of bounds when splitting a string in android
will be helpful for those in need ArrayIndexOutOFBound is coming because you are accessing the forth value you can get by following two ways,
TAG : java
Date : November 25 2020, 07:06 PM , By : PeterRom
Verify if csv file is updated successfully
Verify if csv file is updated successfully
Hope that helps Try appending a checksum or CRC to the end of the file. This would allow you to detect whether an error occurred while the file was being written.When you are reading back the file, just compute the checksum, and compare it against th
TAG : java
Date : November 25 2020, 07:06 PM , By : Rajesh Singh
Get the parameter names of an interface method
Get the parameter names of an interface method
I wish did fix the issue. The only way to obtain the parameter names is to compile the source code using -g:vars options. This generates a LocalVariableTable attribute into the class file. This is generally removed for optimization. For example: (tak
TAG : java
Date : November 25 2020, 07:06 PM , By : Karolis
How to retrieve object state from serialized Java objects without class file(s)
How to retrieve object state from serialized Java objects without class file(s)
seems to work fine Check jdeserialize . It has a command line mode, but also a reasonably well documented API. Regarding automatically re-serializing into XML? I don't think so. There are just too many ways of doing it. You will probably need to go t
TAG : java
Date : November 25 2020, 07:06 PM , By : ehi
How to move a programmed game for pc to android
How to move a programmed game for pc to android
it fixes the issue There are two cross platform projects I recommend for this purpose. LIBGDX, and PlayN.You will be able to reuse some of your code, but will need to change any code using objects which do not exist for the android platform (java.awt
TAG : java
Date : November 25 2020, 07:06 PM , By : Minnanda
Size of an object and a string in Java
Size of an object and a string in Java
wish help you to fix your issue The objective answer first: Primitive data types are documented here Strings are more complicated because the JVM can intern them. See a good explanation here
TAG : java
Date : November 25 2020, 07:06 PM , By : huthief
PrimeFaces Datatable Right Click Select + Row Specific Context Menu
PrimeFaces Datatable Right Click Select + Row Specific Context Menu
Hope that helps I have a simple datatable with 3 columns, that displays AccessCard Entities In one column I have a "Status" which may be lets say "INACTIVE", "DELETED" etc. Obviously these values are derived from the backing bean. , If anyone still n
TAG : java
Date : November 25 2020, 07:06 PM , By : brandon foster
How to use OOP to branch from a point class into lines and triangles (Java)
How to use OOP to branch from a point class into lines and triangles (Java)
With these it helps A Line has 2 Points, so any Line class will have 2 Point-attributesAny Triangle has 3 Points, so any Triangle class will have 3 Point-attributes
TAG : java
Date : November 25 2020, 07:06 PM , By : Shinichi Nishikawa
What does 'String...' mean?
What does 'String...' mean?
it fixes the issue It is called varargs. It works for any type as long as it's the last argument in the signature.Basically, any number of parameters are put into an array. This does not mean that it is equivalent to an array.
TAG : java
Date : November 25 2020, 07:06 PM , By : Zwicky
Add YouTube Data API to Android Studio
Add YouTube Data API to Android Studio
wish helps you So, I am currently messing around with android programming in my free time, and I am using android studio as my ide of choice. I am currently trying to make a very simple app using the youtube api. My issue is that I cant figure out ho
TAG : java
Date : November 25 2020, 07:06 PM , By : helpplzzzzzz
JComboBox in JTable not displaying options, only the correct number of blank options
JComboBox in JTable not displaying options, only the correct number of blank options
Any of those help After the first while loop navigates across the ResultSet rs the subsequent while loop is never entered as there as no more available records and rs.next() returns false
TAG : java
Date : November 25 2020, 07:06 PM , By : Bindu Ramakrishna
JTable and removeAll behavior
JTable and removeAll behavior
To fix the issue you can do You want to change your JTable's model, not call removeAll(). Note that if you go to the JTable API you'll see that the removeAll() method is not a method specifically of JTable but rather of Container, one of JTable's par
TAG : java
Date : November 25 2020, 07:06 PM , By : Catrin Gustavsson
Google App Engine: Can I programmatically find out if this is the default version?
Google App Engine: Can I programmatically find out if this is the default version?
help you fix your problem Use API provided by the new Modules functionality:
TAG : java
Date : November 25 2020, 07:06 PM , By : Xolani Masuku
How do you open a program by using ActionListener in Java?
How do you open a program by using ActionListener in Java?
should help you out I am busy creating a GUI in Java with buttons such that if I press a button it must open another program like Excel or Word and also a folder. Is there anyway that this is possible? , You would do something like this...
TAG : java
Date : November 25 2020, 07:06 PM , By : mwe
Android SipManager: android.net.sip.SipException: SipService.createSession() returns null
Android SipManager: android.net.sip.SipException: SipService.createSession() returns null
Hope that helps There seems to be at least another quirk resulting in the same error code. If you happen to have a pre-defined account with the same request URI on your phone the second one you are trying to create in your app fails this way. Note th
TAG : java
Date : November 25 2020, 07:06 PM , By : foboss
Forcefully terminating a thread I didn't write in Java
Forcefully terminating a thread I didn't write in Java
seems to work fine You can kill -9 it by running in its own process i.e. start with a ProcessBuilder and call Process.destroyForcibly() to kill it.
TAG : java
Date : November 25 2020, 01:01 AM , By : Anse Myller De Arauj
Issue with ojdbc jar in Maven
Issue with ojdbc jar in Maven
wish help you to fix your issue Oracle JDBC drviers (ojdbc6.jar, ojdbc7.jar, ojdbc8.jar) are not published into Maven Central repository due to Oracle license. If it worked before you must have installed it locally (e.g. by running mvn install:instal
TAG : java
Date : November 25 2020, 01:01 AM , By : Deepak
String array length java
String array length java
To fix the issue you can do Arrays are constant size containers, they always have a declared length, this is why you will always get 10.Consider using Lists (for example ArrayList) instead.
TAG : java
Date : November 25 2020, 01:01 AM , By : Christian Stein
Java basic compilation error
Java basic compilation error
it fixes the issue Your issue is that the parameters in your constructor have no data types. NB:
TAG : java
Date : November 25 2020, 01:01 AM , By : EvilSh4rk
Inquiry about writing a Char via ByteBuffer
Inquiry about writing a Char via ByteBuffer
this will help The putChar() method in the ByteBuffer class writes the Unicode for a char into the buffer. This is 16 bits or more. So when you call putChar('a'), you are putting the Unicode for 'a' into the buffer rather than the char 'a'. When you
TAG : java
Date : November 25 2020, 01:01 AM , By : Vũ Nguyễn Tiến
Getting unexpected results when type casting between long and double
Getting unexpected results when type casting between long and double
This might help you The variables l and d have different types, so the expression long == double casts the long to a double ...P.S. l is a bad variable name imho, since it looks a lot like 1 when glancing over code.
TAG : java
Date : November 25 2020, 01:01 AM , By : IBRA
Variable throws variable might not have been initialized error
Variable throws variable might not have been initialized error
help you fix your problem You are getting the error, because that is how it is supposed to behave. From JLS - Section 8.3.1.2:
TAG : java
Date : November 25 2020, 01:01 AM , By : Pooja Banerjee
Start/stop java application from an external script
Start/stop java application from an external script
this will help If you're wanting a "graceful" shutdown, it may be more practical (and easier cross-platform) to open a socket in your long-running process and have your "stop" script connect to it and issue a shutdown command; this might even be prac
TAG : java
Date : November 25 2020, 01:01 AM , By : Carlos.H
Confusion in declaring String Objects
Confusion in declaring String Objects
Does that help Let us first consider this String test=new String("testing"); It creates an String Object in Heap.No Checking is done in String Pool for existence of this String in the pool.
TAG : java
Date : November 25 2020, 01:01 AM , By : JerkerL
What are some ways to do multi-core programming on Android, not just multi-thread?
What are some ways to do multi-core programming on Android, not just multi-thread?
help you fix your problem You don't need to use any API. The operating system and the Dalvik virtual machine schedule the execution of the threads on the available cores.
TAG : java
Date : November 25 2020, 01:01 AM , By : Pieter Dreyer
hibernate - process scoped identity
hibernate - process scoped identity
may help you . Actually, what you implemented is supported out of the box is supported by Hibernate, in a given Hibernate session. Having a unique instance shared between several sessions (and thus transactions) doesn't make any sense because that wo
TAG : java
Date : November 25 2020, 01:01 AM , By : Sunil Matham
Null Pointer Exception on getGraphics()
Null Pointer Exception on getGraphics()
hope this fix your issue You're likely trying to get the Graphics context via getGraphics() before the JPanel has been rendered, and thus the method returns null. Don't do this. There are problems with using getGraphics() on a component to get the Gr
TAG : java
Date : November 25 2020, 01:01 AM , By : batman
Can we print a java message on console without using main method, static variable and static method?
Can we print a java message on console without using main method, static variable and static method?
With these it helps Of course you can, from a class constructor, method or instance block for instance. However if you're talking about launching a simple program with the command line (e.g. java -jar myProgram), you'll still need to instantiate the
TAG : java
Date : November 25 2020, 01:01 AM , By : Gwangjong Lee
sending text from editText to ListView (2 activities)
sending text from editText to ListView (2 activities)
With these it helps i am new to Andriod and programming. i am trying to make a to do list app, which will contain a listView, Button(add) in the main layout. when i click add i want it to go to another activity which will contain a editText and a add
TAG : java
Date : November 25 2020, 01:01 AM , By : user4639913
Transfer value from JList to another class in Java
Transfer value from JList to another class in Java
I hope this helps . As shown here, use the observer pattern. Let MainWindow listen to NameDataBasePanel for a suitable PropertyChangeEvent. See also this a related example that uses a modeless dialog.
TAG : java
Date : November 25 2020, 01:01 AM , By : CuriousTech
Creating 2 streams with one socket
Creating 2 streams with one socket
I wish this helpful for you Streams are stateful - when you read from a stream, you are reading from some position in the stream, and by doing that you change the position.If two things (like you're two wrapper ObjectInputStreams) are reading from th
TAG : java
Date : November 25 2020, 01:01 AM , By : ak48
How measure time stolen from virtual machine, in Scala/Java?
How measure time stolen from virtual machine, in Scala/Java?
around this issue I doubt these tools would be virtual machine aware. I suggest polling System.nanoTime() periodically and when you see a jump in time, your thread was not running. You could even do something like jHiccup which just waits for a milli
TAG : java
Date : November 25 2020, 01:01 AM , By : Kamal Kumar Rajanbab
How can I programmatically generate keypress events?
How can I programmatically generate keypress events?
it fixes the issue Use the Robot class. Code snippet:
TAG : java
Date : November 25 2020, 01:01 AM , By : zaid kharraz
org.apache.commons.net.ssh documentation
org.apache.commons.net.ssh documentation
it helps some times http://commons-net-ssh.googlecode.com/svn/src/main/java/org/apache/commons/net/ssh/SSHClient.javacheckout the ssh project and check the comments (could not find a better option)
TAG : java
Date : November 25 2020, 01:01 AM , By : Farul Macway
Implementation of Dijkstra`s Algorithm - Stuck in an infinite loop
Implementation of Dijkstra`s Algorithm - Stuck in an infinite loop
I wish this help you Your data structures seem a bit confused. In particular you don't seem to have any structure that actually tracks the nodes that need to be considered, in order. dist includes the start node, which is always at distance 0, so dis
TAG : java
Date : November 25 2020, 01:01 AM , By : zangizangi
Should I throw IllegalArgmentException when 'user of given id not exist'?
Should I throw IllegalArgmentException when 'user of given id not exist'?
wish helps you You should use UserNotExistException. The name is very declarative of what is happening. In my opinion you should to avoid returning null but if you do you have to document it.UPDATE
TAG : java
Date : November 25 2020, 01:01 AM , By : Abarnah Kirupananda
In Nimbus, how to paint TextField when MouseOver?
In Nimbus, how to paint TextField when MouseOver?
like below fixes the issue A button is different than a text field. Even in the default metal LAF the button supports a change of border on a mouse over while a text field doesn't. So I guess it is no surprise that the Nimbus text field doesn't suppo
TAG : java
Date : November 25 2020, 01:01 AM , By : karthik
why won't checkforWin(File f) return true when it is true?
why won't checkforWin(File f) return true when it is true?
I hope this helps you .
TAG : java
Date : November 25 2020, 01:01 AM , By : Rahil

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