Reading file in Applet.
Hello All,
i am trying to read a file in applet. i have created a applet that reads file and prints its content. it works fine on local system but when i publish this applet in web server it gives such exceptions.
java.security.PrivilegedActionException: java.lang.reflect.InvocationTargetException
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation.CallMethod(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSInvoke.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
at sun.plugin.liveconnect.PrivilegedCallMethodAction.run(Unknown Source)
... 4 more
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission C:\reading\run.bat read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at readFile.showContent(readFile.java:38)
Can some body say whats going on?
I am stuck over here.
Any help will be appreciated.
Regards
Jaya N pasachhe.
If you are surfing the web, and you click a link to a page that you don't know, you don't want some unknown Applet to start and be allowed access to your local harddrive or printer.
Therefore, Applets ran by the browser, run in a so-called "sandbox". Read about it.
The solution is to "sign" the applet's jar.
see http://www-personal.umich.edu/~lsiden/tutorials/signed-applet/signed-applet.html
and http://forum.java.sun.com/thread.jspa?threadID=174214
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package com.d2e.MyPlugin;
import com.servoy.j2db.scripting.IScriptObject;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.awt.Button;
import javax.sound.sampled.*;
import org.xiph.speex.*;
import org.xiph.speex.spi.*;
import sun.audio.*; //import the sun.audio package
public class MyPluginProvider implements IScriptObject {
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/** Version of the Speex Encoder */
final String VERSION = "Java Speex Command Line Encoder v0.9.7 ($Revision: 1.5 $)";
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/** Print level for messages : Print debug information */
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int destFormat = FILE_FORMAT_WAVE;
int mode = -1;
int quality = 4;
/** Defines the encoders algorithmic complexity. */
int complexity = 3;
/** Defines the number of frames per speex packet. */
int nframes = 1;
/** Defines the desired bitrate for the encoded audio. */
int bitrate = -1;
/** Defines the sampling rate of the audio input. */
int sampleRate = -1;
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float vbr_quality = -1;
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boolean vbr = false;
/** Defines whether or not to use VAD (Voice Activity Detection). */
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//HArd code src format and dest
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srcFormat = FILE_FORMAT_WAVE;
destFormat = FILE_FORMAT_OGG;
//destPath="junk.spx";
byte[] temp = new byte[2560]; // stereo UWB requires one to read 2560b
final int HEADERSIZE = 8;
final String RIFF = "RIFF";
final String WAVE = "WAVE";
final String FORMAT = "fmt ";
final String DATA = "data";
final int WAVE_FORMAT_PCM = 0x0001;
// Open the input stream
DataInputStream dis = new DataInputStream(new FileInputStream("junk.wav"));
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// read the WAVE header
dis.readFully(temp, 0, HEADERSIZE+4);
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dis.readFully(temp, 0, HEADERSIZE);
String chunk = new String(temp, 0, 4);
int size = readInt(temp, 4);
while (!chunk.equals(DATA)) {
dis.readFully(temp, 0, size);
if (chunk.equals(FORMAT)) {
typedef struct waveformat_extended_tag {
WORD wFormatTag; // format type
WORD nChannels; // number of channels (i.e. mono, stereo...)
DWORD nSamplesPerSec; // sample rate
DWORD nAvgBytesPerSec; // for buffer estimation
WORD nBlockAlign; // block size of data
WORD wBitsPerSample; // Number of bits per sample of mono data
WORD cbSize; // The count in bytes of the extra size
} WAVEFORMATEX;
if (readShort(temp, 0) != WAVE_FORMAT_PCM) {
System.err.println("Not a PCM file");
return;
channels = readShort(temp, 2);
sampleRate = readInt(temp, 4);
if (readShort(temp, 14) != 16) {
System.err.println("Not a 16 bit file " + readShort(temp, 18));
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// Display audio info
if (printlevel <= DEBUG) {
System.out.println("File Format: PCM wave");
System.out.println("Sample Rate: " + sampleRate);
System.out.println("Channels: " + channels);
dis.readFully(temp, 0, HEADERSIZE);
chunk = new String(temp, 0, 4);
size = readInt(temp, 4);
if (printlevel <= DEBUG) System.out.println("Data size: " + size);
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mode = 2; // Ultra-wideband
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speexEncoder.init(mode, quality, sampleRate, channels);
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speexEncoder.getEncoder().setComplexity(complexity);
if (bitrate > 0) {
speexEncoder.getEncoder().setBitRate(bitrate);
if (vbr) {
speexEncoder.getEncoder().setVbr(vbr);
if (vbr_quality > 0) {
speexEncoder.getEncoder().setVbrQuality(vbr_quality);
if (vad) {
speexEncoder.getEncoder().setVad(vad);
if (dtx) {
speexEncoder.getEncoder().setDtx(dtx);
// Display info
// Open the file writer
AudioFileWriter writer;
if (destFormat == FILE_FORMAT_OGG) {
writer = new OggSpeexWriter(mode, sampleRate, channels, nframes, vbr);
else if (destFormat == FILE_FORMAT_WAVE) {
nframes = PcmWaveWriter.WAVE_FRAME_SIZES[mode-1][channels-1][quality];
writer = new PcmWaveWriter(mode, quality, sampleRate, channels, nframes, vbr);
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writer = new RawWriter();
writer.open("junk.spx");
writer.writeHeader("Encoded with: " + VERSION);
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try {
// read until we get to EOF
while (true) {
dis.readFully(temp, 0, nframes*pcmPacketSize);
for (int i=0; i<nframes; i++)
speexEncoder.processData(temp, i*pcmPacketSize, pcmPacketSize);
int encsize = speexEncoder.getProcessedData(temp, 0);
if (encsize > 0) {
writer.writePacket(temp, 0, encsize);
catch (EOFException e) {}
writer.close();
dis.close();
* Converts Little Endian (Windows) bytes to an int (Java uses Big Endian).
* @param data the data to read.
* @param offset the offset from which to start reading.
* @return the integer value of the reassembled bytes.
protected static int readInt(final byte[] data, final int offset)
return (data[offset] & 0xff) |
((data[offset+1] & 0xff) << 8) |
((data[offset+2] & 0xff) << 16) |
(data[offset+3] << 24); // no 0xff on the last one to keep the sign
* Converts Little Endian (Windows) bytes to an short (Java uses Big Endian).
* @param data the data to read.
* @param offset the offset from which to start reading.
* @return the integer value of the reassembled bytes.
protected static int readShort(final byte[] data, final int offset)
return (data[offset] & 0xff) |
(data[offset+1] << 8); // no 0xff on the last one to keep the sign
AudioFormat audioFormat;
TargetDataLine targetDataLine;
public Class[] getAllReturnedTypes() {
// TODO Auto-generated method stub
return null;
public String[] getParameterNames(String arg0) {
// TODO Auto-generated method stub
return null;
public String getSample(String arg0) {
// TODO Auto-generated method stub
return null;
public String getToolTip(String arg0) {
// TODO Auto-generated method stub
return null;
public boolean isDeprecated(String arg0) {
// TODO Auto-generated method stub
return false;
public String js_Record (String name){
captureAudio();
return "Started Recording " +name;
public String js_StopRecord (String name) throws IOException{
//new ActionListener(){
// public void actionPerformed(ActionEvent e)
//Terminate the capturing of input data
// from the microphone.
targetDataLine.stop();
targetDataLine.close();
// }//end actionPerformed
//};//end ActionListener
// JSpeexEnc ("junk.wav","output.spx");
JSencode();
return "Stop Records " +name;
//Play audio file
public AudioStream js_Playback (String name) throws IOException{
InputStream in = new FileInputStream("junk.wav");
AudioStream as = new AudioStream(in);
AudioPlayer.player.start(as);
return as;
public AudioStream js_ContPlay (AudioStream as) throws IOException {
AudioPlayer.player.start(as);
return as;
//Stop Play
public AudioStream js_Stop_Playback (AudioStream as) throws IOException{
AudioPlayer.player.stop(as);
return as;
//This method captures audio input from a
// microphone and saves it in an audio file.
private void captureAudio(){
try{
//Get things set up for capture
audioFormat = getAudioFormat();
DataLine.Info dataLineInfo =
new DataLine.Info(
TargetDataLine.class,
audioFormat);
targetDataLine = (TargetDataLine)
AudioSystem.getLine(dataLineInfo);
//Create a thread to capture the microphone
// data into an audio file and start the
// thread running. It will run until the
// Stop button is clicked. This method
// will return after starting the thread.
new CaptureThread().start();
}catch (Exception e) {
e.printStackTrace();
System.exit(0);
}//end catch
}//end captureAudio method
// This method creates and returns an
// AudioFormat object for a given set of format
// parameters. If these parameters don't work
// well for you, try some of the other
// allowable parameter values, which are shown
// in comments following the declarations.
private AudioFormat getAudioFormat(){
float sampleRate = 44100.0F;
//8000,11025,16000,22050,44100
int sampleSizeInBits = 16;
//8,16
int channels = 1;
//1,2
boolean signed = true;
//true,false
boolean bigEndian = true;
//true,false
return new AudioFormat(sampleRate,
sampleSizeInBits,
channels,
signed,
bigEndian);
}//end getAudioFormat
class CaptureThread extends Thread{
public void run(){
AudioFileFormat.Type fileType = null;
File audioFile = null;
//Set the file type and the file extension
// based on the selected radio button.
//if(aifcBtn.isSelected()){
// fileType = AudioFileFormat.Type.AIFC;
// audioFile = new File("junk.aifc");
// }else if(aiffBtn.isSelected()){
// fileType = AudioFileFormat.Type.AIFF;
// audioFile = new File("junk.aif");
// }else if(auBtn.isSelected()){
// fileType = AudioFileFormat.Type.AU;
// audioFile = new File("junk.au");
// }else if(sndBtn.isSelected()){
// fileType = AudioFileFormat.Type.SND;
// audioFile = new File("junk.snd");
// }else if(waveBtn.isSelected()){
fileType = AudioFileFormat.Type.WAVE;
audioFile = new File("junk.wav");
// }//end if
try{
targetDataLine.open(audioFormat);
targetDataLine.start();
AudioSystem.write(
new AudioInputStream(targetDataLine),
fileType,
audioFile);
}catch (Exception e){
e.printStackTrace();
}//end catch
}//end run
}//end inner class CaptureThread
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2) use the JSObject document.write to write the HTML
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Hello every body,
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I Pod touch Will not Update Software
HI, I got an I Pod Touch Model MC540LL (Dont know what Generation it is), Ive tried several times to update software from 4.3.3 to the new 5.0.1? Is that possible? When I try updating using Itunes, the downloading stops and tells me (server reset) I
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XML Element to string conversion returning null
Hi, When i try to convert XML Element to string using toString() API, it returns something like [device: null] where device is element tag. Code is as follows - Document xmlDoc; DOMParser parser = (DOMParser)Class.forName("org.apache.xerces.parsers.D
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I'm trying to update my Boot Camp drivers to 3.0 with the Snow Leopard install disk, but I keep getting this error in XP: The feature you are trying to use is on a network resource that is unavailable. Click OK to try again, or enter an alternate pat
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Strange behavior in Webi : No data returned
Hi, I am experiencing a strange behavior. I have created a condition object in universe. Start Date : DATE_DIM_TBL.DAY >= UPPER(to_char(to_date(@prompt('Enter start date','D',,mono,free),'dd/mm/yyyy HH24:MI:SS'),'dd-mon-yy')) End Date : DATE_DIM_TBL.