Develop Reference

how to obtain the Wireless AP's SSIDs of the network through java?

iam new to java programming and my final year project is based on a Rogue Access point detection tool, and i need to how can i obtain SSID from a java code of the exisiting wifi networks?
for eg: say iam in my laptop i need the program to show how many SSIDs are there broadcasting the SSIDS and the names! (through the built in wifi adapter in the laptop).
Thank you.

Java is a High-Level, Platform-Independent programming language. Network settings, and how you control them will depend on your Operating System, and to my knowledge there is no simple way or an API to expose this,but i tried write a code maybe is helpful for you.
Code :
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package network;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* #author Electron-Eddine
*/
public class Network {
ArrayList<String> localNetworks = new ArrayList<>();
public static void main(String[] args) throws IOException {
new network.Network().display(new Network().getNetwokrs());
new Network().searchSystemNetwork(new Network().getNetwokrs());
}
public ArrayList<String> getNetwokrs() throws IOException {
ProcessBuilder builder = new ProcessBuilder(
"cmd.exe", "/c", "netsh wlan show networks mode=Bssid");
builder.redirectErrorStream(true);
Process p = builder.start();
BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
String lineCommand;
String network ;
while (true) {
lineCommand = r.readLine();
if (lineCommand == null) {
break;
} else if (lineCommand.contains("SSID")&&!lineCommand.contains("BSSID")) {
String[] networks = lineCommand.split(":", 2);
network = networks[1];
if (!network.equals(" ")) {
String pureNetworkName = network.trim();
localNetworks.add(pureNetworkName);
} else {
return null;
}
}
}
return localNetworks;
}
private void display(ArrayList<String> networks) {
networks.forEach(network -> {
System.out.println(network);
});
}
private void searchSystemNetwork(ArrayList<String> networks) {
String REQUIRED_NETWORK = "PEER2PEER";
networks.forEach(network -> {
if (network.equals(REQUIRED_NETWORK)) {
System.out.println("Network is availabale");
} else {
}
});
}
void create()
{
// Netsh WLAN export profile key=clear folder="Folder_Path"
}
}
Output :
run:
PEER2PEER
condor PGN522
Ammar_A
Network is availabale
BUILD SUCCESSFUL (total time: 1 second)

Java Clipboard availability

When I research things on the internet I like to copy and paste certain paragraphs so I could review them later on.
I'm trying to write a program that would continuously check the clipboard for text content and write it to a text file any time it is renewed.
In the following test of the program I had "public class Clipboard" in my clipboard before running the program and the exception happened when I copied text from netbeans (The IDE I was using to run the program) while the program was running:
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
public class TestClipboard {
public static void main(String[] args) {
Clipboard c = Toolkit.getDefaultToolkit().getSystemClipboard();
String initial = "";
while(true) {
try {
String paste = c.getContents(null).getTransferData(DataFlavor.stringFlavor).toString();
if(!paste.equals(initial)) {
System.out.println(paste);
initial = paste;
}
} catch (UnsupportedFlavorException | IOException ex) {
Logger.getLogger(TestClipboard.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
The output:
public class TestClipboard
Exception in thread "main" java.lang.IllegalStateException: cannot open system clipboard
at sun.awt.windows.WClipboard.openClipboard(Native Method)
at sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:78)
at sun.awt.datatransfer.SunClipboard.getContents(SunClipboard.java:144)
at delete.TestClipboard.main(TestClipboard.java:21)
Java Result: 1
BUILD SUCCESSFUL (total time: 34 seconds)
Why can't it open the system clipboard?
Does the getSystemClipboard() method not have global scope? - In other words, can I not get the clipboard's contents if the copy operation was performed in an internet browser?

You appear to be trying to read from the clipboard while another process is updating to it (or some such).
I fixed by:
Requesting an instance of the Clipboard within the loop
Adding a Thread.sleep into the while-loop
For example...
public class TestClipboard {
public static void main(String[] args) {
String initial = "";
while (true) {
try {
Clipboard c = Toolkit.getDefaultToolkit().getSystemClipboard();
String paste = c.getContents(null).getTransferData(DataFlavor.stringFlavor).toString();
if (!paste.equals(initial)) {
System.out.println(paste);
initial = paste;
}
} catch (UnsupportedFlavorException | IOException ex) {
Logger.getLogger(TestClipboard.class.getName()).log(Level.SEVERE, null, ex);
}
try {
Thread.sleep(40);
} catch (InterruptedException ex) {
}
}
}
}
It should be noted that it won't stop it from happening, it will only reduce the number of occurrences. When it is thrown, you could (just about) ignore and try again...

Reading Audio file in java

I have written this code for playing audio file,and I want to get indication when my audio file ends after playing. I have tried AS.getMicrosecondLength() == AS.getMicrosecondPosition() but these methods are undefined for the AudioStream.
My Code:
import java.io.FileInputStream;
import sun.audio.AudioPlayer;
import sun.audio.AudioStream;
public class A {
public static void main(String arg[]) throws Exception {
AudioStream AS = new AudioStream(new FileInputStream("sounds.wav"));
AudioPlayer.player.start(AS);
}
}
Please tell how I can solve my problem

CaptureDeviceManager.getDeviceList() returns null

I coded in java on ubuntu 11.10
Laptop webcam is running correctly and locate it /dev/v4l/.
Skype application can use webcam and run.
I installed JMF but i couldn't add environment variables.`
Vector deviceList = CaptureDeviceManager.getDeviceList(new RGBFormat());
System.out.println(deviceList.toString());
if(!deviceList.isEmpty()){
System.out.println("1");
device = (CaptureDeviceInfo) deviceList.firstElement();
}
device = (CaptureDeviceInfo) deviceList.firstElement();
ml = device.getLocator();
I want to just a capture a image in java.
What should i do solving the problem or use instead of JMF?

Before calling CaptureDeviceManager.getDeviceList(), the available devices must be loaded into the memory first.
You can do it manually by running JMFRegistry after installing JMF.
or do it programmatically with the help of the extension library FMJ (Free Media in Java). Here is the code:
import java.lang.reflect.Field;
import java.util.Vector;
import javax.media.*;
import javax.media.format.RGBFormat;
import net.sf.fmj.media.cdp.GlobalCaptureDevicePlugger;
public class FMJSandbox {
static {
System.setProperty("java.library.path", "D:/fmj-sf/native/win32-x86/");
try {
final Field sysPathsField = ClassLoader.class.getDeclaredField("sys_paths");
sysPathsField.setAccessible(true);
sysPathsField.set(null, null);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String args[]) {
GlobalCaptureDevicePlugger.addCaptureDevices();
Vector deviceInfo = CaptureDeviceManager.getDeviceList(new RGBFormat());
System.out.println(deviceInfo.size());
for (Object obj : deviceInfo ) {
System.out.println(obj);
}
}
}

java. Skype - send message

I'm trying to understand how to work with Skype using java (JSkype lib)
i use example (official site):
package testproj;
import net.lamot.java.jskype.general.AbstractMessenger;
import net.lamot.java.jskype.general.MessageListenerInterface;
import net.lamot.java.jskype.windows.Messenger;
import java.lang.Thread;
import java.lang.Exception;
import java.util.Date;
public class JSkype implements MessageListenerInterface {
private AbstractMessenger msgr = null;
public JSkype() {
msgr = new Messenger();
msgr.addListener(this);
msgr.initialize();
try {
Thread.sleep(5000);
msgr.sendMessage("MESSAGE echo123 test message");
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
new JSkype();
}
public void onMessageReceived(String str) {
System.out.println("RESULT: "+str);
}
}
after run, in console i have many information, but for me more intresting information, that I receive after send message:
RESULT: MESSAGE 21129 STATUS SENDING
RESULT: MESSAGE 21129 STATUS SENDING
RESULT: CHAT #my.name/$echo123;9797238991f90d78 ACTIVITY_TIMESTAMP 1294574640
and now I'm trying to understand, how to determine the success of sending a message?
yep, we need parsind result string.. but what is a number 21129? 9797238991f90d78? how i can know this number before start parsing?