I can't seem to find anything wrong
I can't seem to find anything wrong with this syntax. Am I crazy?
public class AA
private int x;
private int y;
public AA()
x = 0;
y = 0;
public AA(int a, int b)
x = a;
y = b;
public int sum()
return x + y;
public void print()
System.out.println(x + " " + y);
[\code]
brock01 wrote:
[\code]Make that
Describe the problem, post the actual errors, etc.
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I imagine he means "encrypted wireless.
I'm a little confused about what the IT guy wants. If your campus has a wireless network and others with laptops etc can connect to it them you should also be able to with the Apple TV. It seems to me that the campus IT guy needs to give you the name of the wireless network (SSID) and a password so you can connect.
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Hello everyone. I'm running into 2 problems that I can't seem to find functions for after reading the java API on socket and serverSocket.
If a client closed a connection on my server, like if someone telnets into my server, then closes the console, i get the following:
Event from: localhost-> null
Exception in thread "Thread-1" java.lang.NullPointerException
at server.MultiThreadServer.run(MultiThreadServer.java:62)
at java.lang.Thread.run(Thread.java:803)This is the check i do to avoid getting this, but it doesn't seem to work:
//close a connection on this condition.
if(csocket.getRemoteSocketAddress() == null || input.equals("bye"))
System.out.println("Connection closed by client.");
break;
}If I attempt to run a server socket on a socket that is already being used, I'd like to print out a statement saying its being used and do something about it, like let the user enter another port number. Right now I have:
public class MainTest {
public static void main(String args[]) throws Exception
//get console input
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
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String input = stdin.readLine();
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try
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while (true) {
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InetAddress clientIa = sock.getInetAddress( );
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int localPort = sock.getLocalPort();
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catch(IOException e)
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}Me catching the IOException is too broad....if anything goes wrong it will spit out the error and stop program execution as it should.
I tried
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Also inside my server program I'm connecting to another server and if that other server isn't running I'd like to print out an error message stating that.
Right now it will just say: Connection Refused if its not running.
here's that code:
public class MultiThreadServer implements Runnable {
Socket csocket;
MultiThreadServer(Socket csocket) {
this.csocket = csocket;
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try {
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new InputStreamReader(
csocket.getInputStream()));
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//server thus, the (outputServ) will need to be
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Socket outputServ = new Socket("localhost",1234);
if(outputServ.getLocalSocketAddress() == null)
System.out.println("OutputServer isn't running...");
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PrintWriter out
= new PrintWriter(
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outputServ.getOutputStream()));
while(true)
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String input = in.readLine();
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System.out.println("Event from: " + csocket.getInetAddress().getHostName()
+"-> "+ input +"\n");
out.println(input);
out.flush();
//close a connection on this condition.
if(csocket.getRemoteSocketAddress() == null || input.equals("bye"))
System.out.println("Connection closed by client.");
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out.close();
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} catch (IOException e) {
System.out.println(e);
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}Both those conditions don't seem to work, if a client closes a connection it doesn't respond and if the server isn't running on port 1234, i get that connection refused.
Any help would be great!Thanks for the help guys!
adding -1 to the stream worked perfect:
i have it like this:
String input;
//accepting events from omnibus server and storing them
//in a string for later processing.
while ((input = in.readLine()) != null)
//accepting and printing out events from omnibus server
//also printing out connected client information
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+"-> "+ input +"\n");
out.flush();
out.println(input);
out.flush();
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if(in.read() == -1)
System.out.println("Connection closed by client.");
break;
//cleaning up
in.close();
out.close();
outputServ.close();
csocket.close();
} I had one last question, when I catch a socketExpection, such as, if the user enters a port that is already in use, I would like to give them the chance to enter another port before stopping the program.
I'm not sure how I can do this with exceptions though, like i have:
//setting up sockets
ServerSocket ssock = null;
Socket sock = null;
try
//setting up server to run on servPort
ssock = new ServerSocket(servPort);
catch (SocketException e )
System.out.println ("Socket error: " + e);
}now inside that catch block, is there a way for me to allow the user to enter another socket and try again? or am I approaching this wrong?
while(true)
if the port is already been used
allow the user to enter in another port number
else
break;
}I'm confused on how this will work though becuase:
once it hits this line:
ssock = new ServerSocket(servPort);the exception is thrown and it jumps down to the catch block,
now inside that catch block how would I let the user enter in another port number and try this line of code again?
ssock = new ServerSocket(servPort); //this time with the new servPort number?
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