Can I create a socket in a JApplet

I am writing an applet using JApplet. I am trying to connect to a server using java.net.socket. However, every time i run the applet i get the following security exception.
java.security.AccessControlException: access denied (java.net.SocketPermission 129.64.167.212:19190 connect,resolve)
i tried substituting the ip address with localhost but it still didn't work.
I also used getCodeBase().getHost() but my the serverSocket i am running is not on the same IP address as the applet
is it possible to create a socket in JApplet?
I would appreciate your help

You sure can make a socket. but the code you are using is having one error. The following error comes:
java.security.AccessControlException: access denied (java.net.SocketPermission 129.64.167.212:19190 connect,resolve)
you use a lower port no., say 1025
try out, it might help
Cheers

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i've tried that but it doesn't seem to do nething - this is how i implemented it...
import java.net.*;
import java.io.*;
import java.util.*;
public class Mail
public String to_address = "[email protected]";
public String from_address = "[email protected]";
public String sendSub = "HeHeHe";
public String sendBody = "hehehe - it worked";
// This is created to allow data to be read in by the keyboard.
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public static void main (String [] args) throws IOException
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Message was edited by:
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Hi Chris,
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Can I create different Coherence nodes in the same cluster with defferent cache-config.xml file ?
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2009-12-22 12:09:31.400/4.987 Oracle Coherence 3.5.2/463 <Info> (thread=main, member=n/a): Loaded operational configurat
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2009-12-22 12:09:31.450/5.037 Oracle Coherence 3.5.2/463 <Info> (thread=main, member=n/a): Loaded operational overrides
from resource "jar:file:/D:/coherence/lib/coherence.jar!/tangosol-coherence-override-dev.xml"
2009-12-22 12:09:31.470/5.057 Oracle Coherence 3.5.2/463 <D5> (thread=main, member=n/a): Optional configuration override
"/tangosol-coherence-override.xml" is not specified
2009-12-22 12:09:31.540/5.127 Oracle Coherence 3.5.2/463 <D5> (thread=main, member=n/a): Optional configuration override
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Oracle Coherence Version 3.5.2/463
Grid Edition: Development mode
Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.
2009-12-22 12:09:33.864/7.451 Oracle Coherence GE 3.5.2/463 <Info> (thread=main, member=n/a): Loaded cache configuration
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2009-12-22 12:09:39.983/13.570 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=n/a): Service Cluster joined t
he cluster with senior service member n/a
2009-12-22 12:09:43.187/16.774 Oracle Coherence GE 3.5.2/463 <Info> (thread=Cluster, member=n/a): Created a new cluster
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000125B75D888C60501F98
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ss:144, Role=CoherenceServer)
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e=CoherenceServer)
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ClusterService{Name=Cluster, State=(SERVICE_STARTED, STATE_JOINED), Id=0, Version=3.5, OldestMemberId=1}
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2009-12-22 12:12:21.054/3.425 Oracle Coherence 3.5.2/463 <Info> (thread=main, member=n/a): Loaded operational configurat
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2009-12-22 12:12:21.355/3.726 Oracle Coherence 3.5.2/463 <Info> (thread=main, member=n/a): Loaded operational overrides
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2009-12-22 12:12:21.415/3.786 Oracle Coherence 3.5.2/463 <D5> (thread=main, member=n/a): Optional configuration override
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2009-12-22 12:12:29.316/11.687 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=n/a): Service Cluster joined t
he cluster with senior service member n/a
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d=1, Timestamp=2009-12-22 12:09:38.06, Address=192.168.8.80:8088, MachineId=24656, Location=process:144, Role=CoherenceS
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ThisMember=Member(Id=2, Timestamp=2009-12-22 12:12:29.541, Address=192.168.8.80:8089, MachineId=24656, Location=proces
s:1188, Role=CoherenceConsole)
OldestMember=Member(Id=1, Timestamp=2009-12-22 12:09:38.06, Address=192.168.8.80:8088, MachineId=24656, Location=proce
ss:144, Role=CoherenceServer)
ActualMemberSet=MemberSet(Size=2, BitSetCount=2
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2009-12-22 14:00:04.999/6467.370 Oracle Coherence GE 3.5.2/463 <Error> (thread=main, member=2):
java.lang.RuntimeException: Storage is not configured
        at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.onMissing
Storage(DistributedCache.CDB:9)
        at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.ensureReq
uestTarget(DistributedCache.CDB:34)
        at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.put(Distr
ibutedCache.CDB:22)
        at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$BinaryMap.put(Distr
ibutedCache.CDB:1)
        at com.tangosol.util.ConverterCollections$ConverterMap.put(ConverterCollections.java:1541)
        at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$ViewMap.put(Distrib
utedCache.CDB:1)
        at com.tangosol.coherence.component.util.SafeNamedCache.put(SafeNamedCache.CDB:1)
        at com.tangosol.coherence.component.application.console.Coherence.processCommand(Coherence.CDB:581)
        at com.tangosol.coherence.component.application.console.Coherence.run(Coherence.CDB:39)
        at com.tangosol.coherence.component.application.console.Coherence.main(Coherence.CDB:3)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.tangosol.net.CacheFactory.main(CacheFactory.java:1400)

Can I add controls at runtime in JApplet

Please also tell me what good is JApplet for. As I cannot interact with database and there are several other limitations. Should I go and use JApplet in my application or avoid using them.
My basic question remains the same "Can I add controls at runtime in JApplet"

Yes, you can add controls to an applet at runtime.
Applets are run on remote computers, in browsers for instance.
Since they are run remotely, connecting to a database can be difficult. In most cases you'll need a server that makes the connection with the database. The applet speaks with the server via a socket.
If you're writing a standard desktop application, then you should use JFrame.

Creating java sockets behind proxy servers.

Hi,
I am trying to create a socket to an external server(i.e. a public server) from behind a proxy firewall, but the socket creation statement throws an IO exception. Can someone please let me know how to create sockets using proxy servers.
TIA
Shishir

I tried using java.net.Proxy for the connection. But the socket to the proxy itself is not getting created. It throws the IllegalArgumentException.
import java.io.*;
import java.net.*;
import java.net.Proxy.Type;
public class Client {
static Socket proxSocket = null;
static PrintWriter out = null;
static BufferedReader in = null;
public static void main(String[] args) throws IOException {
try {
System.out.println("Trying to create socket");
InetSocketAddress proxyadd = new InetSocketAddress(InetAddress.getByName("148.87.19.20"),80);
Proxy ps = new Proxy(Proxy.Type.HTTP,proxyadd);
Socket proxSocket = new Socket(ps);
out = new PrintWriter(proxSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(
proxSocket.getInputStream()));
} catch (UnknownHostException e) {
System.err.println("Don't know about host: ...");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for "
+ "the connection to: ...");
System.exit(1);
catch(IllegalArgumentException e)
System.err.println("Unable to describe the proxy.");
System.exit(1);
}

Sun RPC - is there a way to create domain sockets?

hi,
I would like to know if there is a way of restricting the Sun rpcgen program to create an RPC for the same host. i.e instead of going through all the layers of the tcp/ip stack i would like it to create domain sockets. This would increase performance of the RPC ( as lesser time would be taken for message transfer).
I am not sure such an option exists. if anyone could give me information abt. how this can be done (if it can be done) it would be very helpful.
Thanks,
Somari.

Great, drop caps work, thanks.
I wanted to kern them back (I can't help myself) and I found that if I put a space after the box and then kerned the space back, it worked visually. Do you think that will cause issues down the road? It previewed ok.
Also if I make the boxes too tight, again to make it more typographically pleasing, may I have issues later if people increase or decrease the font size?
I don't have an iPad yet so I can't check it that way. If something previews, will it run?
thanks

Can I create a JAR that is an Applet and Desktop app at the same time?

Hi mates.
Can I create a JAR that is an Applet and Desktop app at the same time?
Thanks.

Ricardo_Ruiz_Lopez wrote:
..I have one problem, I want a JMenuBar but I can't add it inside a jPanel.
Any idea?
SSCCE
It can be compiled/run as an applet or application something like this (e.g. for a Win command prompt).
C:\Users\Andrew\Hybrid> javac Hybrid.java
C:\Users\Andrew\Hybrid> java Hybrid
C:\Users\Andrew\Hybrid> appletviewer Hybrid.java
C:\Users\Andrew\Hybrid> // YES the previous line requires a '.java' suffix - trust me. ;-)Code
// <applet code='Hybrid' width='600' height='400'></applet>
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
public class Hybrid extends JApplet {
    public void init() {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                GUI gui = new GUI();
                getContentPane().add( gui.getMainPanel() );
                setJMenuBar( gui.getMenuBar(false) );
                validate();
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame f = new JFrame("Test Hybrid");
                f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
                GUI gui = new GUI();
                f.setContentPane(gui.getMainPanel());
                f.setJMenuBar(gui.getMenuBar(true));
                f.pack();
                f.setLocationRelativeTo(null);
                f.setVisible(true);
class GUI {
    private JPanel mainGui = null;
    private JMenuBar menuBar = null;
    public JPanel getMainPanel(){
        if (mainGui==null) {
            mainGui = new JPanel( new BorderLayout(3,3) );
            mainGui.setBorder( new EmptyBorder(5,5,5,5) );
            JToolBar tb = new JToolBar();
            for (int ii=1; ii<6; ii++) {
                tb.add( new JButton( "Btn " + ii) );
                if (ii%2==0) {
                    tb.addSeparator();
            mainGui.add(tb, BorderLayout.NORTH);
            mainGui.add( new JSplitPane(
                JSplitPane.HORIZONTAL_SPLIT,
                new JScrollPane(new JTree()),
                new JTextArea(20,20)
                ), BorderLayout.CENTER );
            mainGui.add(new JLabel("Main user interface.."), BorderLayout.SOUTH);
        return mainGui;
    public JMenuBar getMenuBar(boolean isFloating) {
        if (menuBar == null) {
            menuBar = new JMenuBar();
            if (isFloating) {
                JMenu fileMenu = new JMenu("File");
                fileMenu.add( new JMenuItem("Exit") );
                menuBar.add( fileMenu );
            JMenu helpMenu = new JMenu("Help");
            helpMenu.add( new JMenuItem("About") );
            helpMenu.add( new JMenuItem("Help") );
            menuBar.add( helpMenu );
        return menuBar;
The code is not intended to be well designed. It is just written to be brief and demonstrate a few points.
Edit 1:
Added some access keywords in a passing gesture that the sample aimed at encapsulation.
Edited by: AndrewThompson64 on Sep 2, 2010 1:34 PM

Can I create a socket in a JApplet

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