applet 1 « Development « Java I/O Q&A





1. read file in an applet    stackoverflow.com

Hi there I want to read out a file that lies on the server. I get the path to the file by a parameter

<PARAM name=fileToRead value="http://someserver.de/file.txt">
when I now start the applet following ...

2. Having a lot of trouble deploying a java applet    stackoverflow.com

I'm new to Java. I'm simply trying to build a .jar file of my applet so I can run it from my browser. This is what my directory structure looks like:

C:\java\pacman\src
contains ...

3. Large file uploads with Java applet    stackoverflow.com

I've been tasked with implementing large (2gb+) file uploads via a web browser. After evaluating various technologies, java applets seem to be the way forward (only one's which provide proper access ...

4. can a java applet save files?    stackoverflow.com

i just want to know if it is at all possible to make a java applet save a file to the web server it is being hosted off of.

5. Listing a local directory from a signed applet    stackoverflow.com

The following applet is compiled and packed into jar which is then signed with a self-signed cert.

import java.applet.Applet;
import java.io.File;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;

public class Test extends Applet {
    ...

6. Storing files on client\harddrive from browser\java applet    stackoverflow.com

(How) is it possible to let the user store a file (via save file dialog) on the local harddrive via a java applet? Is there any workarounds for this or do I ...

7. Java file upload applet - Suggestions needed    stackoverflow.com

I want to build a simple file uploading applet in Java. It will be used to upload files to a regular linux web server. So if someone went to:

http://site.com/file-upload-applet
And uploaded a ...

8. java.io.IOException: Invalid Keystore format    stackoverflow.com

Does anyone know how to solve this? I tryed many things non of them work :( And when i click more details i get this:

at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
atsun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)
at com.sun.deploy.security.RootCertStore$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native ...

9. java.nio.channels.OverlappingFileLockException occurring randomly when attempting to embed applet?    stackoverflow.com

Has anyone ever seen this odd error when attempting to load an applet? I get this in jconsole, although the applet activity is pretty plain. I get this exception after

java.lang.NullPointerException
 ...





10. Java applet to upload a file    stackoverflow.com

I am looking for a Java applet to read a file from client machine and creat a POST request for PHP server uploading. PHP script on server should receive the ...

11. How to call an applet from another Java file?    stackoverflow.com

I have a Java file and from that I want to call an applet file. How to do it?

12. Setting the working directory of a Java Applet    stackoverflow.com

I have two signed Jars, a.jar and b.jar. a.jar is launched as an applet inside the browser and b.jar is in Appdata/locallow/xyz (Vista). a adds b to it's classpath and calls some ...

13. Accessing input type="file" full path from a Java applet    stackoverflow.com

It is possible to access HTML DOM from an applet using netscape.javascript JSObject API. However, if I query a value of a input type="file", on some browsers (Opera) I get a full ...

14. Java Applet - Convert File to String    stackoverflow.com

How can convert a certain file into in a String? And then from that String to get the original file? This needs to realize it using Java. It would be greate an ...

15. where to save a jpeg file from an applet    stackoverflow.com

I have a java applet that creates a JPEG file. I want to pass that file to a Javascript where it can display and print it. ...

16. Identify the applet to which was dragged file    stackoverflow.com

I am using Java applet as a box for uploading files. Choosing files from file system and dragging them on applet cause adding file pathnames into the input text box. The design ...





17. Alternative to Java Applet for File System Access from Web    stackoverflow.com

I'd like to integrate a application into a web site which allows user to manipulate files on their local machine via the web browser. Flash and Silverlight run at with low permissions ...

18. How to programmatically load a Java card applet ( a .cap file ) using Visual C++/PCSC    stackoverflow.com

I am currentlly on a project that requires me to load a JavaCard application Applet ( a .cap ) file to a JavaCard. Our framework is based on Visual C++ and ...

19. Why signed applet couldn't write files to the client file system using firefox?    stackoverflow.com

I have an applet (java) that writes some files to the client file system. In Chrome and IE work perfectly and firefox too, only if I run it with Administrator permissions ...

20. Interface design of a java project "File Finder"    stackoverflow.com

I am working on a project File Finder in java. I have to design the interface from where user interacts and access database. I want to know what are the basic items of ...

21. Embedding Java Applet into .html file    stackoverflow.com

I am having trouble embedding my applet into a webpage. I don't think I'm doing it correctly. * I have my html file in the same directory as my .class files My main ...

22. Signing a java applet with an spc file from GoDaddy    stackoverflow.com

I'm trying to sign a java applet using an spc file from godaddy. Here's the command I'm using: keytool -import -keystore codesignstore -storepass [pass] -alias [alias] -file [filename] Unfortunately, running this command ...

23. Printing and saving files in java applets    stackoverflow.com

we have this problem: we want to save files or print from java applet in browser, but this could not be easily implemented, as java applets don't seem to have rights ...

24. What is the best third party upload file applet tool for uploading large or multiple files?    stackoverflow.com

Can anyone tell what the best third party tools are for uploading large files using applet?

25. how to provide access permission for applet to write on file system    stackoverflow.com

HI, I have problem in setup of policy file for applet.I am doing this first time and don't know how to set the policy file for applet in java.Actually I want ...

26. how to provide file write permission for applet in jdk1.4    stackoverflow.com

HI, I have problem in setup of policy file for applet.I am doing this first time and don't know how to set the policy file for applet in java.Actually I want ...

27. Can a Java applet open a "select directory" and write to a filesystem via JavaScript interaction?    stackoverflow.com

I am looking for a way to save a couple of files created with JavaScript on the clients computer. I want him to be able to choose a folder (similar to ...

28. How to list all open files and dir using java?    stackoverflow.com

How to get the all open files,doc,and dir details in java applet or console?

29. let user resume download of files from a web page?    stackoverflow.com

we will have large files (up to 2 Gb) files on a web page, and want to have the functionality that the user can continue a download if it gets interrupted. At ...

30. Serializing objects in an applet    stackoverflow.com

Ok, simply put I am making a quiz game in a java applet, and I want to serialize an object which stores the high scores. When I do this it works ...

31. Reading and writing files in a java applet    stackoverflow.com

I was in the process of turning my jar that reads and writes files into an applet. It displays properly until I add in the read and write function. Then Firefox ...

32. Getting 'shmemBase_attach failed: The system cannot find the file specified' when trying to attach to applet to debug    stackoverflow.com

I'm using netbeans 6.1. I've got the following in my java run time settings: -agentlib:jdwp=transport=dt_shmem,address=jdbconn,server=y,suspend=n and the following in the attach dialog in netbeans: Debugger: JPDA Debugger Connector: Shared Memory Attach (Attaches by shared memory to ...

33. How to sign java applet with .pfx file?    stackoverflow.com

I was trying to sign a jar applet archive with our company .pfx certificate using this guide
(and few others from the internet):
http://www.globalsign.com/support/ordering-guides/SignJavaCodeAppletsPFX.pdf Everything seems to be fine, but ...

34. Read a file in clientside, javascript, java applets    stackoverflow.com

I'm trying to write a web-based application where a JavaScript has to read a file from the client's computer and upload the data to a file in the server. It was ...

35. Alternatives to Applet - File access required on client    stackoverflow.com

I have to create a web application that should be able to access and process local files on the client side (a department). As this will have to be integrated with ...

36. keep folder structure after drag and drop upload in java    stackoverflow.com

i ve written a drag and drop applet that uploads files to an ftp server, problem is, the directory tree is lost after the upload, is there a way to keep ...

37. Applet File not found    stackoverflow.com

I have created an applet with netbeans and self signed and also uploaded to my local web server. When I browse this page then it works fine but when I upload ...

38. Upload File with Java    stackoverflow.com

Is it possible to upload a text file using form submit or with ftp but without any 3rd party library?

39. Ensuring that the serialization of an object is done correctly    stackoverflow.com

Is there a way to ensure that the serialization of an object is done correctly? I created an applet that I serialize with writeObject() method and I have no Exception no error. But ...

40. Stopping download of file in Java applet    stackoverflow.com

I wonder what is the most elegant and optimal way to stop downloading a file. I have a simple applet which is supposed to download requested files from user account at ...

41. Downloading files in Java and common errors    stackoverflow.com

I wrote a simple downloader as Java applet. During some tests I discover that my way of downloading files is not even half as perfect as e.g. Firefox's way of doing ...

42. signed Java applet causes AccessControlException when writing files to local system    stackoverflow.com

I have a Java Applet which is digitally signed.
I need to be able to call a function from javascript which writes an xml file into the user folder. I have ...

43. find java cache directory - dynamically    stackoverflow.com

Is there some way how to find the java cache directory programatically? Normaly it is located in directory like this:

System.getProperty("user.home") + someMiddleDir + "/Sun/Java/Deployment/cache/" +
    versionCode;
which resolves on Windows ...

44. Java Applet to Download files files    stackoverflow.com

I have an applet that is executed in an HTML file that the user downloads and opens locally (i.e. file:// on the URL bar). This applet has a method that downloads ...

45. Interop between html input type=file and java applet    stackoverflow.com

I'm currently developing a web app where I make use of digital signing of forms using the portuguese citizen card and java applets. Everything have been going smoothly with the regular forms ...

46. How can I set my Java applet's working directory in IDEA?    stackoverflow.com

I have been using IntelliJ for a while now and I'm enjoying its suite of features but I'm having a hard time getting the run configurations to work for a java ...

47. Error while creating and writing a file on client machine using applet    stackoverflow.com

Error while creating and writing a file on client machine using applet, even i have used signed jar i am getting this error.

java.security.AccessControlException: access denied (java.io.FilePermission C:\a.txt write)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown ...

48. Can a Java applet create a new folder on the client's machine?    stackoverflow.com

If an applet is running in the browser, can it create folders or files on the client machine?

49. Is it possible to read/write a file from an applet    stackoverflow.com

I've trying to read and write a file from an applet so if I run the applet from my appletviewer it is possible for me to read/write a file but when ...

50. What is the difference between applets loaded over the net and applets loaded via the file system?    stackoverflow.com

I know there are two different ways that applets are loaded by a Java system. 1.Applet loaded over the net. 2.Applet loaded via the file system. But i dont know what is the difference ...

51. Accessing a file in a Java applet    stackoverflow.com

I'm leaning Java language. And I am wondering how can I possible to access(read/write) a text file in a java applet that reside in a server? Please advise. Many thanks EDIT: Only read access but ...

52. Drag and Drop files from Applet to Desktop    stackoverflow.com

I was wondering how to drag and drop files from a java applet to the desktop. So far i've been able to display all the files with the right icon and ...

53. Issue while uploading files from Java Applet    stackoverflow.com

I have developed a Java Applet which has the functionality of uploading files to a server. The implementation as follows:

  1. Java Applet window opens & the files are loaded to the Java Applet ...

54. How to create file from java applet?    stackoverflow.com

I'm trying to create an excel file and save to local file system using java applet. After sign the application, i can successfully create the file by directly invoking the applet. ...

55. Object persistence in Java applets    stackoverflow.com

What is a good approach to save state of a Java applet? I can deal with object serialization/deserialization to/from a file but don't know where it should be placed or if there's ...

56. Trying to load java applet via html file    stackoverflow.com

Directory is like so:

test.html
blah
hmmm
Inside "blah" we have all the applet files, including blahBlah.class. Inside "hmmm" are a few more more class files that were taken from a library or something, they ...

57. java.util.PropertyPermission user.home read (Access Denied)    stackoverflow.com

I have a signed applet in which i have used JFilechooser to browse file from local file system for uploading. It runs properly in windows and mac. But in ...

58. JMF- no permission to write files from applet    stackoverflow.com

I am creating a application using jmf that will be launched on a user's computer with java web start and a jnlp file. I would like to create a jpg image ...

59. Java Applet Download File    stackoverflow.com

I am trying to build a java applet which downloads a file to the client machine. As a java application this code worked fine but when I tried as an applet ...

60. Allow user to download a file generated by Java applet using Javascript API    stackoverflow.com

I have a Java applet embedded into a web page which generates a file that the user must download. I understand there is a way to do this by communicating with ...

61. Saving file into local disc using Applet    bytes.com

What does "doesn't work" mean? Did you get a Permissions exception? If so, there's another thread going on in this forum about the very same subject; you have to make your ...

62. CORBA and File access in an applet    coderanch.com

63. Directory listing of my Applet's origin....    coderanch.com

Please consider the following: 1) I have an applet that can run from either a local or remote location (URL). Within this applet, how do I determine the path of the applet origin? 2) Once the location was determined, how do I obtain a file list of the particular location(directory)? I was able to find methods in the API such as ...

64. Write with an applet    coderanch.com

I not sure you understood, I working under unix and netscape. When a user logs on to the web page, they must log in (and checks for the hosts file, if the user doesn't have the right IP address the applet can't load. So the user has to manully append the file Thanks anyway

65. Signed applet using javax.comm    coderanch.com

I am using a signed applet that utilizes the javax.comm package. I have used this package with out any problem on the same machine. I copied the comm.jar file into the jre/lib/ext directory along with the javax.comm.properties file. Also placed the win32com.dll in the jre/bin directory. When I run the applet I am not getting the port listings like I did ...

66. Applet and IO    coderanch.com

67. applet    coderanch.com

Hello there, The java security manager "a deamon thread that is always running within the JVM", does not allow applets to access the file system for security reasons. Also, an applet can not make some calls like "System.exit(0)", and it cannot open sockets with sites other than the one from which it was loaded, otherwise, it would become a trojan. However ...

68. Reading files from applets    coderanch.com

69. PC camera in applet??    coderanch.com

70. ach! do applets and filestreams not mix?    coderanch.com

I have been looking up on the internet for quite a while how to make a FileWriter object in an applet. I always do exactly as the code says and get a permissions exception. I don't really know what to do about all of this...I am working on a UNIX filesystem, and I have even tried setting the permissions for the ...

71. Applet to read webpage files    coderanch.com

72. Strange problem occurred while using IO from java Applet    coderanch.com

Hi all, I am currently encountering a very depressing issue, and I hope you guys can help me out. I am using IBM WSAD, and I wrote a function to write all the data from object to a file. This function works fine except calling from Applet. Here is one of the function of my program named "BookStoreIOHandler": public void fileWriter(List ...

73. Reading file + Applet    coderanch.com

I have an applet which loads in values as follows points = new Points(); points.addCity(new City(points, 288, 149)); points.addCity(new City(points, 288, 129)); points.addCity(new City(points, 270, 133)); Here is my addCity() method public synchronized void addCity(City c) { cities.addElement(c); if(numCities() == 1) { edges = new Vector>(); Vector v = new Vector(); v.addElement(null); edges.addElement(v); } else { for (int i = 0;i ...

74. Multiple file upload using java applet    coderanch.com

75. Applet Serialization    coderanch.com

Can any one help me in telling the ways to serialize an applet after creating & painting(drawing graph) the applet. The applet will be passed with parameters with which it has to draw a graph and need to send it as a response. I am trying to pass some parameter from an HTML which will call a servlet, which needs to ...

76. printign file using applet    coderanch.com

hello all.. I have to created an application using applet in which I have to choose file say word/execel/txt file... & have to take print out of this file without opening..it. even Ican take print out on network printer also.. although by using Printer Class print dialoge is opend but how to assign my document file(.xls/.doc)

78. Trusted and Signed Applet still gets java.io.filepermission read error    coderanch.com

A friendly place for programming greenhorns! Register / Login Java Forums Java I/O and Streams Trusted and Signed Applet still gets java.io.filepermission read error Post by: philip depalo, Greenhorn on Oct 17, 2009 15:39:21 So when I run the applet from a "client" machine before I signed and trusted the applet I could not even display the "browse directories" ...

79. Opening applet with .html file    java-forums.org

k and i just noticed when i open yours as a text file it displays the text thats in your applet the "you Should see an applet below" edit k i looked at the Textedit prefences and theres a bunch of different option for saving in html. it gives 4 different document types, 4.01 HTML strict, 4.01 HTML transitional, XHTML 1.0 ...

80. file access from applet    java-forums.org

I have created a folder which contains the index.html file describing an applet name newapplet.java.In this newapplet.java it accesses a file which is in same folder and its contents are to be read.I have uploaded this folder in webserver.But I cannot see the contents.But when I test this applet from my machine I can see the contents.Where is the problem?

81. data file Access from applet    java-forums.org

I am uploading the html file from my PC to the server.In fact I have uploaded the project created in NEtbeans IDE which has src folder containing the source file i.e, .java file.The html file is outside the folder of the project.Now for the applet to access the data file where the .dat file should be kept.??I am confused.

82. Error when trying to view applet in a .htm file    java-forums.org

Java Plug-in 1.6.0_26 Using JRE version 1.6.0_26-b03 Java HotSpot(TM) Client VM User home directory = C:\Users\deep ---------------------------------------------------- c: clear console window f: finalize objects on finalization queue g: garbage collect h: display this help message l: dump classloader list m: print memory usage o: trigger logging q: hide console r: reload policy configuration s: dump system and deployment properties t: dump ...

83. trouble with filepath names for applets    forums.oracle.com

Im not really new to java but I havent used many applets before. When I load images or soundfiles into my applet, I cant seem to get the filepath description right. Same counts for the applet.class resource on the Html page. So what I have now is an applet running in eclipse, with all the GIFs or JPEGs in the source ...

84. File Applet?    forums.oracle.com

Since technically you cannot use AJAX to post uploads we use a hidden Iframe that gets the information from the main page and then passes it to our processing script. When it is uploading I have a div that overlays the entire page that states "please wait" once the file is uploaded the iframe clears the div. I guess I could ...

85. How can an applet access a file ??    forums.oracle.com

Due to security model in java, Applet can not access the local file system. The applet is running on your browser, hence it is not allowed to access your file system. The quick solution is to put the file in the same directory of the applet and you can access it through URL address

86. Why is Applet OK from local file but not when served?    forums.oracle.com

I'm a Java beginner. I've written a really simple applet that works well in the Applet viewer and in IE and Firefox when I open the appropriate html file on my local machine. However, when I upload the html file and the class file to a server and open the URL in the same browsers all I get is a blank ...

87. Problems running an applet out of the TEMP directory    forums.oracle.com

Ok, To keep it short, I have a small applet that generates pie graphs. This applet works fine normally, but when I run it inside another program I use, I keep getting the "Loading Java Applet Failed" error. The problem is the following (I think) The HTML page that calls the applet is being loaded with a program that has a ...

89. upload http file using applet    forums.oracle.com

90. Making Applet to read a file.    forums.oracle.com

92. Local Applet Files    forums.oracle.com

Hi all, I'm new, and after this question some of you might think I'm crazy. Can an applet store image files on visitors local computer? For quicker loading by referencing at future visits (archive data, stored files, whatever it's called). If so, what is the limit? So far, all together, the images are around 50MB. If so, would you mind pointing ...

93. Why can't my applet read from a file.    forums.oracle.com

First off let me say I am an uber novice. I made an ObjectOutputStream and FileOutputStream make a file that contained a Vector with 33,000 single strings in it (don't ask) and I want a separate applet to use that file. The file is called "words.nsd" and it will be uploaded at the same time and in the same location as ...

94. Getting current directory from an applet    forums.oracle.com

was trying to read from a text file but it's giving me some diffrent error messages so i decide d to show the path to make sure that it can see the file. is it possible for an applet to read directory structure of my server cuz I'm getting a permissin problem still even though the atributes are all set to ...

95. -- Saving Files Using Applets --    forums.oracle.com

Typically, applets have security managers that will not allow you to save files to the computer that runs the applet. If you REALLY want to do this, you will need to research applet security policies. Usually, its the web browser that runs the applet that ultimately decides to allow applets to save local files, though, and not the applet itself. - ...

96. java applet IO Filepermissions    forums.oracle.com

97. How fast can a java applet read from a file?    forums.oracle.com

Another factor is the size of a line in your file. It also depends on what you are doing with it! I can flip through a 400 page book in seconds, but can I remember/interpret everything that's in it in the same time? If you do some complex rocket science while you are reading or write it to some remote database, ...

98. Applet checking if file exist and if no copy this file    forums.oracle.com

Halo, everyone, I'm new to java and I need an applet which is able to check if certain file exist on user's hard drive and if not to copy it. I read that this is possible in certain circumstances, that applet has to be trustes and so on, but that's not my problem. My request is the applet code that checks ...

99. Applet structure with multiple input files    forums.oracle.com

System.out.println("paint hashtable size "+ ht.size()); g2.setColor(Color.blue); //origin points int xPos = 80; int yPos = 3924; //draw y axis // g2.drawLine(80, 0, 80, (4000-80)); g2.fillRect(xPos, 0, 4, yPos); //draw x axis // g2.drawLine(80, (4000-80), 2400, (4000-80)); g2.fillRect(xPos, yPos, 2400, 4); //draw ticks on y axis for (int i=yPos;i>0;i=i-200) { //g2.drawLine(xPos-16, i, xPos, i); g2.fillRect(xPos-16, i, 16, 4); } // draw ticks ...