Applet needs browser to be restarted ?!?
Hi again.. thats the problem:
1) I open FireFox2
2) i go to the Applet Page and make it start -> OK it works...
3) i close the Applet Page -> shutdown seems to be clear...
4) i go to the Applet Page and make it start -> it loads very quickly but it is unresponsive
5) i close all FireFox2 instances
6) i go to the Applet Page and make it start -> OK it works again..
the same is for IE7... any ideas?
thanks in advice.
You seem to be running afoul of the applet lifecycle somehow.
Perhaps something that should be in start() you've placed in init() or in the constructor.
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Exception loading file from path:java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
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here is the sample coding :
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.behaviors.mouse.MouseZoom;
import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.net.URL;
import java.net.MalformedURLException;
import org.web3d.j3d.loaders.VRML97Loader;
import com.sun.j3d.loaders.Scene;
public class SimpleVrml extends Applet implements ActionListener {
String location;
String initLocation;
Canvas3D canvas;
SimpleUniverse universe;
TransformGroup vpTransGroup;
VRML97Loader loader;
View view;
Panel panel;
Label label;
BranchGroup sceneRoot;
TransformGroup examineGroup;
BranchGroup sceneGroup;
BoundingSphere sceneBounds;
DirectionalLight headLight;
AmbientLight ambLight;
TextField textField;
Cursor waitCursor;
Cursor handCursor;
public SimpleVrml() {
initLocation="cylinder.wrl";
setLayout(new BorderLayout());
GraphicsConfiguration config =SimpleUniverse.getPreferredConfiguration();
setLayout(new BorderLayout());
canvas = new Canvas3D(config);
add("Center",canvas);
panel = new Panel();
panel.setLayout(new FlowLayout(FlowLayout.LEFT));
textField = new TextField(initLocation,60);
textField.addActionListener(this);
label = new Label("Location:");
panel.add(label);
panel.add(textField);
add("North",panel);
waitCursor = new Cursor(Cursor.WAIT_CURSOR);
handCursor = new Cursor(Cursor.HAND_CURSOR);
universe = new SimpleUniverse(canvas);
ViewingPlatform viewingPlatform = universe.getViewingPlatform();
vpTransGroup = viewingPlatform.getViewPlatformTransform();
Viewer viewer = universe.getViewer();
view = viewer.getView();
setupBehavior();
loader = new VRML97Loader();
gotoLocation(initLocation);
public void actionPerformed(ActionEvent ae) {
gotoLocation(textField.getText());
void gotoLocation(String location) {
canvas.setCursor(waitCursor);
if (sceneGroup != null) {
sceneGroup.detach();
Scene scene = null;
try {
URL loadUrl = new URL(location);
try {
// load the scene
scene = loader.load(new URL(location));
} catch (Exception e) {
System.out.println("Exception loading URL:" + e);
} catch (MalformedURLException badUrl) {
// location may be a path name
try {
// load the scene
scene = loader.load(location);
} catch (Exception e) {
System.out.println("Exception loading file from path:" + e);
if (scene != null) {
// get the scene group
sceneGroup = scene.getSceneGroup();
sceneGroup.setCapability(BranchGroup.ALLOW_DETACH);
sceneGroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ);
// add the scene group to the scene
examineGroup.addChild(sceneGroup);
// now that the scene group is "live" we can inquire the bounds
sceneBounds = (BoundingSphere)sceneGroup.getBounds();
// set up a viewpoint to include the bounds
setViewpoint();
canvas.setCursor(handCursor);
void setViewpoint() {
Transform3D viewTrans = new Transform3D();
Transform3D eyeTrans = new Transform3D();
// point the view at the center of the object
Point3d center = new Point3d();
sceneBounds.getCenter(center);
double radius = sceneBounds.getRadius();
Vector3d temp = new Vector3d(center);
viewTrans.set(temp);
// pull the eye back far enough to see the whole object
double eyeDist = 1.4*radius / Math.tan(view.getFieldOfView() / 2.0);
temp.x = 0.0;
temp.y = 0.0;
temp.z = eyeDist;
eyeTrans.set(temp);
viewTrans.mul(eyeTrans);
// set the view transform
vpTransGroup.setTransform(viewTrans);
private void setupBehavior() {
sceneRoot = new BranchGroup();
examineGroup = new TransformGroup();
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_READ);
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE);
examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
sceneRoot.addChild(examineGroup);
BoundingSphere behaviorBounds = new BoundingSphere(new Point3d(),
Double.MAX_VALUE);
MouseRotate mr = new MouseRotate();
mr.setTransformGroup(examineGroup);
mr.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mr);
MouseTranslate mt = new MouseTranslate();
mt.setTransformGroup(examineGroup);
mt.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mt);
MouseZoom mz = new MouseZoom();
mz.setTransformGroup(examineGroup);
mz.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mz);
BoundingSphere lightBounds =
new BoundingSphere(new Point3d(), Double.MAX_VALUE);
ambLight = new AmbientLight(true, new Color3f(1.0f, 1.0f, 1.0f));
ambLight.setInfluencingBounds(lightBounds);
ambLight.setCapability(Light.ALLOW_STATE_WRITE);
sceneRoot.addChild(ambLight);
headLight = new DirectionalLight();
headLight.setCapability(Light.ALLOW_STATE_WRITE);
headLight.setInfluencingBounds(lightBounds);
sceneRoot.addChild(headLight);
universe.addBranchGraph(sceneRoot);
public static void main(String[] args) {
new MainFrame(new SimpleVrml(), 780, 780);
cylinder.wrl :
#VRML V2.0 utf8
# A cylinder
Shape {
appearance Appearance {
material Material { }
geometry Cylinder {
height 2.0
radius 1.5
view.html:
<html>
<applet code="SimpleVrml.class" width=600 height=600>
</applet>
</html>
error msg that i get :
Exception loading file from path:java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
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yes i close all streams...
the core method i use to upload files is below (client is a FTPClient object)
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To whom it may concern,
According to Java RIA checklist(http://www.oracle.com/technetwork/java/javase/overview/ria-checklist-2055184.html),
as of 7u51(January 2014), Permissions Manifest attribute in main JAR file will be required.
But, at least, as of 7u45, when the Security Level slider is set to Very High,
a jar without Permissions Manifest attribute, which doesn't contain the applet code but is just referenced by the applet,
prevent the applet from running.
So, the question is:
In 7u51, does it mean that all jars referenced by the applet need to be updated to include the Permissions Manifest attribute ?
Or will it be limited to the jar that contains the applet code?
There is a concern that we will have to modify library jars that we do not control.
Sincerely,
Toshio ShikoThank you for your quick response and your investigation!
It do help us very much.
But, unfortunately, for the moment, I'm not allowed to test the early access version.
As soon as circumstances are changed, I' d like to test it.
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hi ..... i'm asking about solution for my problem which is how can i let my browser (explorer oR Netscape) to read from file and write to file in my pc..
my applet is working with AppletViewer which i can read and write to file in my pc ,but when i load it in the Browser(netscape) it just read and do't write....
in the explorer it not reading and not writing ..
i changed the security in the browser option ,,,but no thing happend ...
i need solution please for my problem ,,,and if you can tell me about browser which will do it for me ,,(i tried hotjava browser)
thanxYou need to sign your applet...see link below for info and example on how I did it:
http://home.attbi.com/~aokabc/FileIO/FileIOdemo.htm
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V.V. -
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File upload applet without browsing
hi all,
i m a php developer, i need a java applet to be embedded in html, that contains a button (upload), on clicking that all text files from a predefined location, without browsing, in the clients computer could be uploaded to server.
help me from the scratch.
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A better strategy might exist if you can..
a) write to a ZIP archive from PHP? (which can reduce all the reports to being contained in a single file*).
b) Invoke 'shell commands' from PHP, as you might from the command line interface, the Windows Command Prompt?
If both those answers are 'yes', I would recommend dumping the applet for a JWS launched application that uses the JNLP API's [file service|http://pscode.org/jws/api.html#fs].
Try especially the sandboxed version of the demo.
Using webstart, this might all be achieved 'sandboxed'.
It would work like this.
The PHP script writes all the reports to a single zip archive with file extension '.reportarchive' instead of '.zip'.
After the reports are prepared and stored, two shell commands are required.
javaws -import -association -silent http://www.our.com/upload.jnlp
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javaws -open C:/the/path/the.reportarchive http://www.our.com/upload.jnlp
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Once the user has OK'd the access to the reportarchive, the rest (uploading it) can be done automatically (with a progress bar).
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If the user fails to select the 'always allow' option for the file list, they will be prompted for each file (until they do). The advantage of the archive is that the user is only ever asked once.
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