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JAVA QUESTIONS

How to open new applet window from a applet
How to open new applet window from a applet
fixed the issue. Will look into that further To open a new Java window (JFrame) from an applet, see the following extract from the Java tutorial:
TAG : java
Date : October 29 2020, 08:01 PM , By : user3854527
Getting Google results in Java? Need help!
Getting Google results in Java? Need help!
seems to work fine Jack is right, take a look at the Google AJAX APIs. If you want nicely formatted results, brush up on your html and css.
TAG : java
Date : October 29 2020, 08:01 PM , By : user3854520
Smart Cards Development
Smart Cards Development
wish helps you You're talking about GlobalPlatform and there's a right open source tool out there for this, called GPJ
TAG : java
Date : October 29 2020, 08:01 PM , By : German
Is there a possibility to run applets on Android or Blackberry?
Is there a possibility to run applets on Android or Blackberry?
seems to work fine Jave applet is still alive, many organizations use it, a lot of HMI's use it,also banks, I wanted to buy few android tablets and use it in our factory for our technicians, But no applet support, so i will go on use my android table
TAG : java
Date : October 29 2020, 08:01 PM , By : user3854467
what does a tool like Jasper Reports/report generator gives me?
what does a tool like Jasper Reports/report generator gives me?
will be helpful for those in need These tools may not necessarily save you that much time writing the SQL, but they will give you a nice clean presentation of the data for your customers.
TAG : java
Date : October 29 2020, 08:01 PM , By : user3854461
How to create docking panel in Java?
How to create docking panel in Java?
This might help you If you mean to use a Swing docking framework in your application, there are some of them already existing: InfoNode MyDoggy JDocking1
TAG : java
Date : October 29 2020, 08:01 PM , By : bkizzle
Where and why JVM checks that the return type of entry method main(String args[]) is void and not anything else?
Where and why JVM checks that the return type of entry method main(String args[]) is void and not anything else?
it fixes the issue From what I can gather, the reason main returns void in Java is threads.C and C++ were both designed before multithreading was a common idiom, while threads were an integral part of Java from its conception. In any kind of non-triv
TAG : java
Date : October 29 2020, 08:01 PM , By : samforan
Static value in for loop
Static value in for loop
should help you out No because you used a static variable. A static variable is common to all the instances (or objects) of the class because it is a class level variable. In other words you can say that only a single copy of static variable is creat
TAG : java
Date : October 28 2020, 08:00 PM , By : Ariana De Andrade
Difference between Class c; and Class c=new Class();
Difference between Class c; and Class c=new Class();
this one helps. Without assigning a reference to your variable (be it a newly created one, or be it some existing reference that say a method returns to you) you can do exactly nothing (productive, you can use such nulls of course to have the compile
TAG : java
Date : October 28 2020, 08:00 PM , By : Jow
My question is about Regular Expression in java
My question is about Regular Expression in java
will be helpful for those in need When using e.g. online regex tools, when the whole regex is enclosed in slashes, the regex required in your case is:
TAG : java
Date : October 28 2020, 08:00 PM , By : pasalapudi sattiraju
Why can't I write ch=ch+1; instead of ch++; though they have same meaning
Why can't I write ch=ch+1; instead of ch++; though they have same meaning
like below fixes the issue , You need to provide a cast in order to do that :
TAG : java
Date : October 28 2020, 08:00 PM , By : Harish Muthu
Why is this loop changed?
Why is this loop changed?
I wish this help you In this situation changing while() to for() is not an optimization. There is simply no way to know from bytecode which one was used in a source code.There are many situations when:
TAG : java
Date : October 28 2020, 08:00 PM , By : Farid
Java (Read and write to file)
Java (Read and write to file)
like below fixes the issue The PrintWriter only really writes when they are closed (close) or flushed (flush or maybe when it thinks it is time ;-)).Try to use try-with-resources whenever possible, that way you do not need to think about closing/flus
TAG : java
Date : October 28 2020, 08:00 PM , By : CPelote
What's ideal debugging setup? window placement etc
What's ideal debugging setup? window placement etc
hop of those help? Most productive? That's going to vary greatly from person to person. You shouldn't focus on what works best for other people or details like precise window placement... figure out what works best for you with some trial and error.F
TAG : java
Date : October 28 2020, 08:00 PM , By : Thomas
Java app behind proxy to use http_proxy variable in linux
Java app behind proxy to use http_proxy variable in linux
around this issue I am thinking of a simple Java appplication (command line) that connects to the internet to download a XML file, the problem is that my Ubuntu is using a proxy to connect to internet with username and password (through http_proxy ="
TAG : java
Date : October 28 2020, 08:00 PM , By : Ryan McGough
Straight Java/Groovy versus ETL tool (Talend/etc) - what libraries would you use?
Straight Java/Groovy versus ETL tool (Talend/etc) - what libraries would you use?
wish help you to fix your issue It depends on whether the deliverable is the processor or the output itself. If you just need to deliver the output, you don't need to maintain the code. If the code needs to be maintained then will it be you maintaini
TAG : java
Date : October 28 2020, 08:00 PM , By : user3854277
Performance testing Flex applications
Performance testing Flex applications
it fixes the issue My Company (UBIK-INGENIERIE) distributes a commercial Flex/AMF Apache JMeter plugin.You can easily record, variabilize and replay FLEX/AMF based application with standard knowledge of Apache JMeter.
TAG : java
Date : October 28 2020, 08:00 PM , By : Yasir Mehboob
How to insert into two different tables in one statement with Java and MySQL?
How to insert into two different tables in one statement with Java and MySQL?
I hope this helps you . I am using Java, Spring (NamedParameterJdbcTemplate) and MySQL. My statement looks like this: , Use the addBatch method to run multiple statements
TAG : java
Date : October 28 2020, 08:00 PM , By : Miguel.Simple
Object Serialization for Undo/Redo Functionality Java
Object Serialization for Undo/Redo Functionality Java
seems to work fine Game programming has not much to do with "enterprise app" programming nor with "webapp programming". So it depends on what kind of game you're working on but your approach and the ones gaven so fare have absolutely nothing to do wi
TAG : java
Date : October 28 2020, 08:00 PM , By : Morteza Farhang
How to retrieve the last image from an SDcard in Android?
How to retrieve the last image from an SDcard in Android?
should help you out To get a handle to the File object representing the root of the SD card's filesystem you can use, Environment.getExternalStorageDirectory().Listing the files in a directory is relatively straight forward using the File object's li
TAG : java
Date : October 28 2020, 08:00 PM , By : Test
What's the fastest way to draw a Hello World in Java
What's the fastest way to draw a Hello World in Java
I hope this helps . What's the fastest way to draw a Hello World on the screen using a GUI in Java: , this is the fastest graphical Hello world i could get.
TAG : java
Date : October 28 2020, 08:00 PM , By : Hrvoje Snopek
Java error on bilinear interpolation of 16 bit data
Java error on bilinear interpolation of 16 bit data
hope this fix your issue What version of java (java -version) and OS are you using? It might be a bug in the transform (which has since been fixed) or it might be an error in the rendering to PNG.Have you tried using a NEAREST_NEIGHBOR filter instead
TAG : java
Date : October 28 2020, 08:00 PM , By : catagranic
Java equivalent for database schema changes like South for Django?
Java equivalent for database schema changes like South for Django?
will be helpful for those in need Wow, South sounds pretty awesome! I'm not sure of anything out-of-the-box that will help you nearly as much as that does, however if you choose Hibernate as your ORM solution you can build your own incremental data m
TAG : java
Date : October 28 2020, 08:00 PM , By : khomka
Java Robot key activity seems to stop working while certain software is running
Java Robot key activity seems to stop working while certain software is running
like below fixes the issue I'm writing a Java application to automate character actions in an online game overnight (specifically, it catches fish in Final Fantasy XI). The app makes heavy use of java's Robot class both for emulating user keyboard in
TAG : java
Date : October 28 2020, 08:00 PM , By : user3854099
Will using multiple version of a jar in an application cause problems?
Will using multiple version of a jar in an application cause problems?
To fix the issue you can do Yes, that's a bad idea. What will probably happen if you're lucky is that whichever of the two versions that comes first in the classpath will satisfy all the references. If that happens, then the other versions of the .ja
TAG : java
Date : October 28 2020, 08:00 PM , By : mucx
JSF RuntimeException: Cannot find FacesContext
JSF RuntimeException: Cannot find FacesContext
it helps some times When I write tag in my JSP, I get the following exception message: , There are two flaws in your code:
TAG : java
Date : October 28 2020, 08:00 PM , By : user3854002
How do i get a particular day from Jan to Dec
How do i get a particular day from Jan to Dec
Hope this helps OK, assuming you are starting from 1st of January here is a simple example for your cause. I hope Java1.8 code is clear to you.
TAG : java
Date : October 28 2020, 04:55 PM , By : Saurav Anand
Hibernate configuration for Mysql 8.0
Hibernate configuration for Mysql 8.0
hop of those help? I'm new in Java! When I run the Junit test the console show me exception and I don't know how to resolve this. What is wrong with my Hibernate configuration? This code perfect works with H2 database, but when I change database and
TAG : java
Date : October 28 2020, 04:55 PM , By : 大原清佳
What JVM can run on CPU and GPU?
What JVM can run on CPU and GPU?
wish helps you AFAIK, no JVM can automagically off-load work to a GPU (apart from cases where the GPU is used for graphics ...)But there are various ways to use GPUs from Java. This QA has a good summary:
TAG : java
Date : October 28 2020, 04:55 PM , By : ajc19
How to cast an image received from a webservice in Binary64 format to actual image?
How to cast an image received from a webservice in Binary64 format to actual image?
I hope this helps . The type indicator [B tells you that you have received a byte array, rather than a string from your iterator. Whether those bytes are the wire format for the Base64 string (so needing to create a new string with the appropriate en
TAG : java
Date : October 28 2020, 04:55 PM , By : Tom Groszko
Is there anyway to get the generated keys when using Spring JDBC batchUpdate?
Is there anyway to get the generated keys when using Spring JDBC batchUpdate?
around this issue Spring framework folks attempted a solution to this problem. But they abandoned the attempt when it became apparent that there is no way to guarantee that the solution will work with all JDBC Drivers. This is because the JDBC spec d
TAG : java
Date : October 28 2020, 04:55 PM , By : djfrancox
How good is Oracle Universal Connection Pool (UCP)
How good is Oracle Universal Connection Pool (UCP)
it should still fix some issue I evaluated UCP 11.2.0.1 as a replacement for our legacy connection pool and I cannot recommend it: it does not fully support jdk 6 / ojdbc6.jar. For example the use of statement caching and jmx-support does not work wi
TAG : java
Date : October 28 2020, 04:55 PM , By : MCK
How to populate Java (web) application with initial data using Spring/JPA/Hibernate
How to populate Java (web) application with initial data using Spring/JPA/Hibernate
should help you out You can write a unit test to populate the database, using JPA and plain Java. This test would be called by Maven as part of the standard build lifecycle. As a result, you would get an fully initialized database, using Maven, JPA a
TAG : java
Date : October 28 2020, 04:55 PM , By : Joe Anidi
How do I make my frames change in java?
How do I make my frames change in java?
This might help you The setVisible(true); function is used to display a frame. Create an object of the desired frame and call this function. Something like this
TAG : java
Date : October 28 2020, 04:55 PM , By : Amber
Java Swing - Background of a JPanel
Java Swing - Background of a JPanel
I hope this helps . Try using a JTable and then alternating the colors of the row. This way you can write a generic JComponent (AlternatingColorTable) and use it just like a regular JTable in those 4 panels.Something like this maybe:
TAG : java
Date : October 28 2020, 04:55 PM , By : Sebastian Puebla Ros
Printing pdf from extjs - best solution
Printing pdf from extjs - best solution
will be helpful for those in need Well, finally I came to the next solution: firstly we use AJAX request to save form details, and generate PDF on server side.
TAG : java
Date : October 28 2020, 04:55 PM , By : Rohan Bende
Clean a RandomAccessFile
Clean a RandomAccessFile
I hope this helps you . You can use RandomAccessFile.setLength(0) to truncate the file.
TAG : java
Date : October 28 2020, 04:55 PM , By : g_dann
JFileChooser and browsing networked machines
JFileChooser and browsing networked machines
this will help This might help.
TAG : java
Date : October 28 2020, 04:55 PM , By : Shamal Sandeep
How to write Java string literals that contain double-quotes (")?
How to write Java string literals that contain double-quotes (")?
Hope that helps You have unescaped quotes inside your call to Pattern.compile.Change:
TAG : java
Date : October 28 2020, 04:55 PM , By : user3853766
What do I use Artifacts in IntelliJ IDEA for?
What do I use Artifacts in IntelliJ IDEA for?
This might help you Sure it can, please see the related blog posts: one and two.
TAG : java
Date : October 28 2020, 04:55 PM , By : Marlon
Bug with Spring Security 3.0.2 x Spring 3.0.1 - Proxies not being created
Bug with Spring Security 3.0.2 x Spring 3.0.1 - Proxies not being created
help you fix your problem I don't know what is happening here, but I had a similar problem with a Roo application: it worked well until I configured the security.My problem was that I have a custom AuthenticationManager that uses Roo Entities to find
TAG : java
Date : October 28 2020, 04:55 PM , By : Samuel Gyan
DBunit generates java.lang.ClassCastException: java.lang.String cannot be cast to oracle.sql.CLOB when trying to load a
DBunit generates java.lang.ClassCastException: java.lang.String cannot be cast to oracle.sql.CLOB when trying to load a
Any of those help Use org.dbunit.ext.oracle.Oracle10DataTypeFactoryin datafactory config.
TAG : java
Date : October 28 2020, 04:55 PM , By : Had Ouled Frej
Hibernate configuration - session factory scanning?
Hibernate configuration - session factory scanning?
this one helps. To get the discovery mechanism, you need to use Hibernate EntityManager which implements the Java Persistence standard discovery mechanism. Otherwise you need to list your classes.
TAG : java
Date : October 28 2020, 04:55 PM , By : VaFO
Enter Key Press behave like Submit in JSF
Enter Key Press behave like Submit in JSF
Hope that helps I haven't seen this issue before. The chance is little that this behaviour is browser specific. Try in different kinds of browsers to exclude the one and other (IE6/7/8, FF, Safari, Chrome, etc). The chance is bigger that this is caus
TAG : java
Date : October 28 2020, 04:55 PM , By : Shwetha
Using protocol buffers for binary logging
Using protocol buffers for binary logging
I wish this helpful for you From my understanding of protocol buffers it does not support multiple messages in a single stream. So you will probably need to track the boundaries of the messages yourself. you can do this by storing the size of the mes
TAG : java
Date : October 28 2020, 04:55 PM , By : Matt Dawson
EasyMock Class Extension mock isn't mocking methods
EasyMock Class Extension mock isn't mocking methods
like below fixes the issue Derr... The method was defined as final. Silly me. Hope this helps another silly person in the future
TAG : java
Date : October 28 2020, 04:55 PM , By : user3853705
How do I convert a byte array to Base64 in Java?
How do I convert a byte array to Base64 in Java?
it fixes the issue Okay, I know how to do it in C. , Java 8+ Encode or decode byte arrays:
TAG : java
Date : October 28 2020, 04:55 PM , By : Gergo Barta
How to modify camel Exchange and send it
How to modify camel Exchange and send it
this will help Sounds like a data transformation; have you looked at https://camel.apache.org/message-translator.htmlThe simplest way would be to use a processor;
TAG : java
Date : October 25 2020, 07:10 PM , By : rclaus
How do I avoid constructors?
How do I avoid constructors?
Any of those help You cannot create an object without calling one of its constructors, so you likely want a no-argument constructor in your Cash class:
TAG : java
Date : October 25 2020, 07:10 PM , By : Anne Caroline
Passing string in where clause using PreparedStatement
Passing string in where clause using PreparedStatement
seems to work fine How do I use a PreparedStatement to pass a string in a where clause? , Try it like this:
TAG : java
Date : October 25 2020, 07:10 PM , By : Subhodeep Ghosh
Tomcat 7 - Ignoring db conections pool parameters (DBCP)
Tomcat 7 - Ignoring db conections pool parameters (DBCP)
may help you . Add values also for maxConnLifetimeMillis
TAG : java
Date : October 25 2020, 07:10 PM , By : surag m
How does reduce() method work with parallel streams in Java 8?
How does reduce() method work with parallel streams in Java 8?
I hope this helps you . The problem is you use Stream::reduce for Mutable reduction, which has been Stream::collect specifically designed for. It can be either used for the safe parallel storing. Read about the differences also at official Oracle doc
TAG : java
Date : October 25 2020, 07:10 PM , By : Ivan Tolstov
How can I use a generic class with wildcard declaration?
How can I use a generic class with wildcard declaration?
I wish this help you I have the following member in my class: , My question is twofold, why can't I do:
TAG : java
Date : October 25 2020, 07:10 PM , By : Danny Young
Unable to add ArrayList with multiple arguments
Unable to add ArrayList with multiple arguments
help you fix your problem Your Movie constructor only takes one Genre as argument, while it should take a List as argument:
TAG : java
Date : October 25 2020, 07:10 PM , By : bbubbletrubble
Move application into second window monitor in javafx
Move application into second window monitor in javafx
like below fixes the issue I was writing java FX application. I have two monitors connected into one PC. I wanted to open application in the second window monitor. somehow I managed to do it with vbox not loading inside of them components. But when I
TAG : java
Date : October 25 2020, 07:10 PM , By : Felix
does intern() method have implication on performance?
does intern() method have implication on performance?
Hope this helps I have some confusion about the usefulness of the intern() method. , How many objects will the above line of code create?
TAG : java
Date : October 25 2020, 07:10 PM , By : Dem Nod
How to run NPM Command in Java code using ProcessBuilder
How to run NPM Command in Java code using ProcessBuilder
it helps some times My environment is mac. I'm trying to run "npm ls" from my java code but it throws error messages. , Try providing full path to the npm executable:
TAG : java
Date : October 25 2020, 07:10 PM , By : Jazton
Sending HTTP/2 request via Socket in Java
Sending HTTP/2 request via Socket in Java
may help you . That will not work.HTTP/2 is a binary protocol, not a textual protocol, so in order to use a raw socket you have to generate the proper bytes that form a HTTP/2 request.
TAG : java
Date : October 25 2020, 07:10 PM , By : Kelvin Ma
eclipse IDE wrong warning that unused field
eclipse IDE wrong warning that unused field
Any of those help While you do set the value field in your constructor, it isn't actually used anywhere in the Node class. There is a difference between setting a field and using it. If you would omit the value variable from your code, it would not m
TAG : java
Date : October 25 2020, 07:10 PM , By : Zooloo10
Decode Java enum from single char
Decode Java enum from single char
hope this fix your issue Colors.valueOf("R") is a implicitly declared method and a shortcut of Enum.valueOf(Colors.class, "R").The documentation of Enum.valueOf states
TAG : java
Date : October 25 2020, 07:10 PM , By : Mariela Barrera

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