arun mahajan

Hi,

I was trying to go through with exception handling and found that any exception thrown by a method should be catch. but when I tried following code it works and have not shown any error while compiling while the method as per javadoc throws IndexOutOfBoundsException.


class DemoSubString { public static void main(String[] args) { String sub = ""; int index = Integer.parseInt(args[1]); sub = args[0].substring(index); System.out.println("Sub string value:: "+sub); } }

Could you help me to understand.

Hello Everybody,


I am trying to make a connection with a server on a particular port and read & write data through this conenction. ALl goes well and I am able to make conenction & read & wrtie through this but while I am trying to run this program continuously it starts throwing error:

<b>Connection reset by peer: socket write error</b>

00:23:30 Exception: java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:69)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:113)
at com.logica.smpp.TCPIPConnection.send(TCPIPConnection.java:353)
at com.logica.smpp.Transmitter.send(Transmitter.java:79)
at com.logica.smpp.Session.send(Session.java:993)
at com.logica.smpp.Session.send(Session.java:1048)
at com.logica.smpp.Session.enquireLink(Session.java:789)
at SmppReceive.enquireLink(SmppReceive.java:437)
at SmppReceive.receive(SmppReceive.java:538)
at SmppReceive.main(SmppReceive.java:169)

I tried finding on web but not much help. My questions are:

1. if this error means the connection is closed by the other end than what could be the probable causes?

2. Why it succeeded to make another connection same time?

3. If I tried to ping or telnet on the particular port why it shows communication while program show the above error.

Would be highly obliged if you could help me to understand the problem.

regards,
Arun
[ June 07, 2006: Message edited by: arun mahajan ]

Thanks fo ryour reply.

I also tried this way:

String str = new String(bb);

if(str.length()<1)
System.out.println("Array is empty");

Though seems a bit inefficient

//br Arun

Dear All,

I am decalring following:

byte[] bb = new byte[512];

and want to know after some processing that if all elements of this bb byte array are null or not. Is there any way of finding the same except runnign a while loop?

regards
Arun

Hello Everybody,

I am bit confused and try to find out which is the best way of Initializing the variable sum here. My questions are:

1. If I define the second way, does it mean it will put more load on the system.

2. does the efficiency get reduce in second method, as it is Initializing every time.

Please help me to find a answer.

Thanks & regards

Arun

Code I:
public class Fibonacci { public static void main(String[] args) { int sum = 0, a = 0, b = 1; System.out.print(a); System.out.print(","+b); for(int cnt=0;cnt < 20;cnt++) { sum = a+b; System.out.print(","+sum); a = b; b = sum; } } }
Code II:
public class Fibonacci { public static void main(String[] args) { int a = 0, b = 1; System.out.print(a); System.out.print(","+b); for(int cnt=0;cnt < 20;cnt++) { int sum = a+b; System.out.print(","+sum); a = b; b = sum; } } }
[ March 27, 2006: Message edited by: arun mahajan ]

Hello Everybody,

I am bit confused and try to find out which is the best way of Initializing the variable sum here. My questions are:

1. If I define the second way, does it mean it will put more load on the system.

2. does the efficiency get reduce in second method, as it is Initializing every time.

Please help me to find a answer.

Thanks & regards

Arun

Code I:
public class Fibonacci { public static void main(String[] args) { int sum = 0, a = 0, b = 1; System.out.print(a); System.out.print(","+b); for(int cnt=0;cnt < 20;cnt++) { sum = a+b; System.out.print(","+sum); a = b; b = sum; } } }
Code II:
public class Fibonacci { public static void main(String[] args) { int a = 0, b = 1; System.out.print(a); System.out.print(","+b); for(int cnt=0;cnt < 20;cnt++) { int sum = a+b; System.out.print(","+sum); a = b; b = sum; } } }
[ March 27, 2006: Message edited by: arun mahajan ]

HI Everybody,

It *MUST* have been asked earlier but somehow I am not able to find out an answer for this.

1. What is SOAP(Simple Object Access Protocol) all about?

2. Where can I use this?

3. Does this has anything to do with HTTP replacement?

4. Why I need SOAP?

Can somebody help me to find the above questions answers? Perhaps if you can provide me some reference link to start with.

With BEst Regards,
Arun

Any taker for this. Would be highly obliged if someone can spare some moments and helpme out

regards,
arun

Hello,

Can you pl spare a moment and let me know :-

1. Is every new call will make a new object?
2. or there will be only location reference value change?
3. WHat will happene if GC gets called?( Just a assumption that it gets activcated after first time we make the tt null)

regards,
Arun

public class TestGC { public static void main(String[] args) { TestGC tt = new TestGC(); System.out.println("First obj: "+tt); tt = new TestGC(); System.out.println("second onj: "+tt); tt=null; tt = new TestGC(); System.out.println("Third Obj after null: "+tt); } }

Hello Everybody,

I get stuck up in the following code. I am trying to do the following:

1. Making a connection
2. Writing something on it.
3. Reading from the socket.

Surprisingly while trying to read from the socket it fails toread anything in first attempt. Even trying available() method returns 00. but a subsequent reading always gives me the data back available on the socket. Though even in this attempt the available() method returns 0.

Why it is showing such a behaviour? Am I doing something wrong? Can you pl help me

regards,
Arun

import java.io.DataInputStream; import java.io.BufferedInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.Socket; import java.net.SocketException; import java.net.UnknownHostException; public class SmscClient { private int smscType=0; private boolean soTimeOut = false; public SmscClient(){} public static void main(String[] args) { try{ Socket smsSocket=null; DataInputStream dis=null; DataOutputStream dos=null; BufferedInputStream bis = null; SmscClient sc = new SmscClient(); //socket connection smsSocket = new Socket("192.168.100.91",4000); smsSocket.setSoTimeout(15*1000); byte[] rs = new byte[42]; rs[0]=0x00; rs[1]=0x00; rs[2]=0x00; rs[3]=0x2A; rs[4]=0x00; rs[5]=0x00; rs[6]=0x00; rs[7]=0x02; rs[8]=0x00; rs[9]=0x00; rs[10]=0x00; rs[11]=0x00; rs[12]=0x00; rs[13]=0x00; rs[14]=0x00; rs[15]=0x01; rs[16]=0x6D; rs[17]=0x69; rs[18]=0x73; rs[19]=0x74; rs[20]=0x65; rs[21]=0x72; rs[22]=0x69; rs[23]=0x63; rs[24]=0x73; rs[25]=0x73; rs[26]=0x6F; rs[27]=0x6E; rs[28]=0x00; rs[29]=0x70; rs[30]=0x61; rs[31]=0x73; rs[32]=0x6D; rs[33]=0x69; rs[34]=0x73; rs[35]=0x74; rs[36]=0x00; rs[37]=0x00; rs[38]=0x34; rs[39]=0x02; rs[40]=0x01; rs[41]=0x00; //writing dos = new DataOutputStream(smsSocket.getOutputStream()); dos.flush(); dos.write(rs); dos.flush(); //reading byte[] bufr = null; byte[] retbuf = null; dis = new DataInputStream(smsSocket.getInputStream()); //bis = new BufferedInputStream(smsSocket.getInputStream()); System.out.println("\n\n read"); byte buf1[] = new byte[250]; dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); System.out.println("\n\n read"); dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); System.out.println("\n\n read"); dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); } catch(Exception e) { System.out.println("Error: "+e); } } }

Hello Everybody,

I get stuck up in the following code. I am trying to do the following:

1. Making a connection
2. Writing something on it.
3. Reading from the socket.

Surprisingly while trying to read from the socket it fails toread anything in first attempt. Even trying available() method returns 00. but a subsequent reading always gives me the data back available on the socket. Though even in this attempt the available() method returns 0.

Why it is showing such a behaviour? Am I doing something wrong? Can you pl help me

regards,
Arun

import java.io.DataInputStream; import java.io.BufferedInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.Socket; import java.net.SocketException; import java.net.UnknownHostException; public class SmscClient { private int smscType=0; private boolean soTimeOut = false; public SmscClient(){} public static void main(String[] args) { try{ Socket smsSocket=null; DataInputStream dis=null; DataOutputStream dos=null; BufferedInputStream bis = null; SmscClient sc = new SmscClient(); //socket connection smsSocket = new Socket("192.168.100.91",4000); smsSocket.setSoTimeout(15*1000); byte[] rs = new byte[42]; rs[0]=0x00; rs[1]=0x00; rs[2]=0x00; rs[3]=0x2A; rs[4]=0x00; rs[5]=0x00; rs[6]=0x00; rs[7]=0x02; rs[8]=0x00; rs[9]=0x00; rs[10]=0x00; rs[11]=0x00; rs[12]=0x00; rs[13]=0x00; rs[14]=0x00; rs[15]=0x01; rs[16]=0x6D; rs[17]=0x69; rs[18]=0x73; rs[19]=0x74; rs[20]=0x65; rs[21]=0x72; rs[22]=0x69; rs[23]=0x63; rs[24]=0x73; rs[25]=0x73; rs[26]=0x6F; rs[27]=0x6E; rs[28]=0x00; rs[29]=0x70; rs[30]=0x61; rs[31]=0x73; rs[32]=0x6D; rs[33]=0x69; rs[34]=0x73; rs[35]=0x74; rs[36]=0x00; rs[37]=0x00; rs[38]=0x34; rs[39]=0x02; rs[40]=0x01; rs[41]=0x00; //writing dos = new DataOutputStream(smsSocket.getOutputStream()); dos.flush(); dos.write(rs); dos.flush(); //reading byte[] bufr = null; byte[] retbuf = null; dis = new DataInputStream(smsSocket.getInputStream()); //bis = new BufferedInputStream(smsSocket.getInputStream()); System.out.println("\n\n read"); byte buf1[] = new byte[250]; dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); System.out.println("\n\n read"); dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); System.out.println("\n\n read"); dis.read(buf1,0,buf1.length); for(int j=0;j<buf1.length;j++) System.out.print((int)buf1[j]); } catch(Exception e) { System.out.println("Error: "+e); } } }

Hi Everybody,

I could remember there was some write up by Cindy on the above two.. could not able to locate on the site. Can somebody help me?

regards,
arun

Hello Everybody,
I am trying to make one program for windows in Java. The objective is to make a auto Dialer type of stuff for connecting to Internet. The flow would be as follows:
1. Will run a setup program.
2. This setup program will make a icon at the network neighbourhood.
3. Will ask to select a driver for a particular modem brand and wil copy it.
4. Once above done, user need to just click at connect to just get connected.
I don't know how to do step 2 and 3 i.e making icon and copyng the drivers. Perhaps this is a question which does not belong here but also don't know where to ask.
I would be highly obliged if some one can spare a moment and let me know how to proceed on this.
regards,
Arun

Hello Everybody,
I am trying to make one program for windows in Java. The objective is to make a auto Dialer type of stuff for connecting to Internet. The flow would be as follows:
1. Will run a setup program.
2. This setup program will make a icon at the network neighbourhood.
3. Will ask to select a driver for a particular modem brand and wil copy it.
4. Once above done, user need to just click at connect to just get connected.
I don't know how to do step 2 and 3 i.e making icon and copyng the drivers. Perhaps this is a question which does not belong here but also don't know where to ask.
I would be highly obliged if some one can spare a moment and let me know how to proceed on this.
regards,
Arun

Hello,
Is it possible to set this classpath programatically too!!
Arun