Java Core APIs

• Java Core APIs Questions

• • Multiple URLConnections

    Hello Friends, In my application on the client side (applet), there is need to keep in touch with th...

    By chpraveen

  • Zone blocks

    What are zone blocks and how can we make use of them in assocication with jsp. Is there any site whi...

    By rahulghai

  • Compressed tunnelling

    I have previously made a simple java port forwarder that uses a Tunnel class I made.The tunnel class...

    By ghelyara

  • how can i do a text search in a directory of files

    how can i do a text search in a directory of files.I need this code urgently.could any one solve ..p...

    By sadanandvarma

  • use of properties file

    I need to connect to a database I have specified the driver class and url in a .properties file, I h...

    By arunkumar

• • problem with servlet->applet communication

    Hello!I have a problem when I try to send some data (ObjectOutputStream) from a servlet to an applet...

    By namarakrein, 6 Comments

  • about lucene software...

    Hi guys;this post is for those of you familiar with the search engine open source LUCENE from the ja...

    By o37355345a, 1 Comments

  • XML output shown as plain text

    I have a servlet which build an XML document on the fly.My problem is that the servlet shows the xml...

    By jeppesommer, 3 Comments

  • "CLASS NOT FOUND" error when running RMIC

    Hi.I have copied the code from internet to study RMI.I compiled the codes and tried to rmic it.Howev...

    By gomastera, 2 Comments

  • USB API

    I want to access the USB device to read/write data.Which API I can use to access it from java.I want...

    By kalyaninayak, 1 Comments

• Java Core APIs: is the Category's subject.It's has 60,766 questions,this is No.3,039 pages.
• How to check for not instanceof ?
• thanx...
• hontonia, Mon, 15 Mar 2010 01:07:00 GMT, 12 bytes, 49 Answer
• Zip Exception
• Hi,I am getting "java.util.zip.ZipException: oversubscribed dynamic bit lengths tree" , when I am trying to retreive files from a zip file. I am using jdk1.5, windowsXP professional.The part of my code is,zipStream is ZipInputStream.do{ZipEntry zipEntry = zipStream.getNextEntry();if(zipEntry ==...
• tejokumar, Mon, 15 Mar 2010 00:00:00 GMT, 484 bytes
• "After" filter?
• Hello!I have a servlet which gets request, processes and gives some specific output as response. I had to pre-parse request information for this servlet, so I've created filter (doFilter(...)). The problem now is that I need I need to be able to modify servlet's output too, but I cannot...
• pandamima, Sun, 14 Mar 2010 23:40:00 GMT, 676 bytes, 1 Answer
• Zip file manipulation in memory
• Hi all,here's what I'm trying to do: I'm writing a client/server application using RMI. Besides other functions, the client must be able to transfer a zipFile from its harddisk to the server, which then manipulates the zip file (read entries, etc) without ever storing it on its own harddisk. ...
• falkehrmanna, Sun, 14 Mar 2010 23:25:00 GMT, 620 bytes, 5 Answer
• "ClassCastException" for items in List after serialization
• consider this code:public class MyClass implements Serializable { public double price = -1; public double volume = -1;}List list = new ArrayList<MyClass>();while(!endOfData) { MyClass mc = new MyClass(); ... mc.price = x; mc.volume = y; list.add(mc);}ObjectOutputStream oos = new ...
• suppona, Sun, 14 Mar 2010 22:47:00 GMT, 1,771 bytes, 3 Answer
• Your Opinions: Inner Classes Need static Members
• Hi All,I want to solicit opinions for a minor change to the way inner classes work. I submitted this as an RFE to Sun and they rejected it, really without giving a reason. I'd like to know your opinions. If there is strong support I will repost the RFE.As you probably know, inner classes ...
• tony_lapaso, Sun, 14 Mar 2010 22:22:00 GMT, 2,688 bytes, 17 Answer
• ZIP a directories
• i can zip a file... buti have some problem to zip a directories...Can you help me?thx...
• feynareendrina, Sun, 14 Mar 2010 22:10:00 GMT, 101 bytes, 2 Answer
• how to redirect from a single servlet to more than one jsp's?
• is it possible that i redirect from a servlet to a jsp and from that jsp i again come back to the servlet and redirect to another jsp?...
• kaustubhsaha, Sun, 14 Mar 2010 22:04:00 GMT, 134 bytes, 1 Answer
• "Bad Magic Number Error"
• Hi!I am getting this error.I am using JRun."java.lang.ClassFormatError: jrun__login2ejspa (Bad magic number)"Could anybody help me out.....Regards..Preethi....
• preethisuryam, Sun, 14 Mar 2010 22:03:00 GMT, 180 bytes, 4 Answer
• XMLEncoder performance: is it unusable?
• Using XMLEncoder to encode a small graph (one page's worth of XML) takes five seconds and lots of memory on my machine (fairly new). I have seen at least one other report of *extremely* poor performance in XMLEncoder. Is this a known issue? Is XMLEncoder usable at ...
• cowwoc, Sun, 14 Mar 2010 20:22:00 GMT, 303 bytes, 3 Answer
• ZipOutputStream and Directories
• I've begun working on a back-up mechanism for my application's data, which simply involves using java.util.zip to compress all of my data and write it out to a ZIP file. Using a ZipOutputStream seems very easy in this manner, except... all of my data files are stored in distinct director...
• davetaubler, Sun, 14 Mar 2010 19:51:00 GMT, 1,464 bytes, 1 Answer
• ZipInputStream problem
• hiI have images stored in a zip file on the server. I tried reading them using ZipInputStream, but the images are not retrieved properly when there is a client side proxy server. Otherwise it works fine. Is there any way to get over this ? Can the same be achieved in any way other than using Zip...
• vidyavenkatesh, Sun, 14 Mar 2010 19:39:00 GMT, 330 bytes, 1 Answer
• byte[] to primitives conversion
• Hello,I need to convert byte[] to int or long (let's say double or float is in future plans) and from int or long - to byte[], always having an option to change byte ordering.I came to 2 solutions:1. making value from each byte value, multiplying it by 256 power order number (b0*256 + ...
• ramunasa, Sun, 14 Mar 2010 19:37:00 GMT, 1,029 bytes, 6 Answer
• ZIPOutputStream's putNextEntry(ZipEntry e)
• Hi, I have question about ZIPOutputStream's public void putNextEntry(ZipEntry e). When we place a ZipEntry, the method puts this ZipEntry object in the beginning of the stream right? The one occupied beginning position prior to the method was placed behind this current one or is it deleted?...
• bobmoranski, Sun, 14 Mar 2010 17:44:00 GMT, 403 bytes
• ZipInput-/OutputStream too slow - any faster way to compress XML?
• Hi folks!For an industry project we are supposed to transmit XML files via a message queueing system. Unfortunately, the messages are really big, which might be just one reason for some of the performance problems we are expiriencing. So I tried to compress the messages using the the classes ...
• novatc, Sun, 14 Mar 2010 16:56:00 GMT, 791 bytes, 5 Answer
• ZipFile randomaccess
• Hi All,I am using the ZipFile class in Java to parse/read data from an ascii file. But I want to implement this reading process using the RandomAccessFile and read the data randomly. But I am using a StreamTokenizer from the ZipFile to read the data currently, but I am stuck without knowing how ...
• rajanvijaya, Sun, 14 Mar 2010 16:48:00 GMT, 479 bytes, 1 Answer
• zip as database?
• Hi,In a web app I'm developing I've got over 900k little GIF files, each about 4k bytes, way more than one directory can hold. Over time there'll be a lot more of them. I've never used anything in java.util.zip and I know nothing about the format, but I'm wondering if it's a good way to ...
• newracera, Sun, 14 Mar 2010 15:40:00 GMT, 967 bytes, 17 Answer
• Is there any concept like Port Timeout.
• Hi all,Plz help me, briefly my problem is as follows:I start the RMI server application on a PC and client applications accesses it. If the client applications do not accesses the RMI server the server remains idle. and if the server remains idle for more time it stops replying to the client's ...
• yuvrajpingale, Sun, 14 Mar 2010 15:38:00 GMT, 1,548 bytes, 1 Answer
• XML Serialization
• Hi, I need serialize java objects to XML. Is there any useable open source solution? ...
• beargie, Sun, 14 Mar 2010 15:29:00 GMT, 106 bytes, 3 Answer
• Wrapper cannot find servlet class
• Hi!!I am new to servlets. I am trying to run an example from head first servlets(page 81). I have copied BeerSelect.class froma different location. Rest all is same as it says in the book.Errors I am getting arejavax.servlet.ServletException: Wrapper cannot find servlet class com.example.web.Bee...
• surbhitugnawat, Sun, 14 Mar 2010 08:54:00 GMT, 455 bytes, 7 Answer
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