I/O Exception Java Error

[SamirM]

i am new to java. i am having trouble running some of my codes. Can someone tell me why i am getting "I/O Exception while Reading, Connection refused", message.?

[jagannathan]

please send the code where u get this error

[mahammadseeraz]

i am new to java. i am having trouble running some of my codes. Can someone tell me why i am getting "I/O Exception while Reading, Connection refused", message.?

U might have these problems
1. didn't throw IOException
2. Import IO package.

[r035198x]

U might have these problems
1. didn't throw IOException
2. Import IO package.

No. The OP doesn't have any of those problems.

[JosAH]

A 'connection refused' exception indicates that there's no server responding at all.
Firewalls? Is the server running? Correct IP address? Correct port number?

kind regards,

Jos

[andhraprince]

I/O Exception while reading

[B]Hi
Every1
I have coded a applet program named Friends.java, long years ago (may be 5 years) and i made it out without any exceptions and i save the file in a CD. But now when i execute the program i don't get any Exceptions but when i execute appletviewer command i'm getting error message as:- "I/O Exception while reading: F:\Friends.html (The system cannot find the specified file)

The following is the file, some1 please execute the following program on their respective JVM's and let me know please

//import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event. *;
//import java.util.*;
//import java.sql.*;
public class Friends extends JFrame implements ActionListener, MouseListener
{
JFrame frame;
JPanel main,card,p1,p2 ;

static PreparedStateme nt stat,stat1,stat 2;
static Connection con,conn,connn;
static ResultSet result;
JOptionPane pobj;

JLabel l,l1,l2,l3,l4,l 5,l6,l7;
TextField t,t1,t2,t3,t6,t 7;
TextArea ta;
Choice cities;
JButton enter,add,del,q uery,update,exi t,truncate;
FlowLayout fl;
CardLayout cl;
GridBagLayout gbl,gbl2,gbl3;
GridBagConstrai nts gbc,gbc2,gbc3;
Thread th;
//Date date;
GregorianCalend ar calendar;
String strDate,strTime ,strStatus;

public Friends()
{
frame=new JFrame(" Friends Contact Numbers and their Birthday Dates ");
frame.setSize(5 00,500);
frame.setVisibl e(true);
frame.setDefaul tCloseOperation (JFrame.EXIT_ON _CLOSE);
main=new JPanel();
card=new JPanel();
frame.getConten tPane().add(mai n);

gbc=new GridBagConstrai nts();
gbc2=new GridBagConstrai nts();
gbc3=new GridBagConstrai nts();
gbl=new GridBagLayout() ;
gbl2=new GridBagLayout() ;
gbl3=new GridBagLayout() ;
cl=new CardLayout();

main.setLayout( gbl);
card.setLayout( cl);

gbc.anchor=Grid BagConstraints. CENTER;
gbc.gridx=1;
gbc.gridy=2;
gbl.setConstrai nts(card,gbc);
main.add(card);
main.setBackgro und(Color.pink) ;

Font font =new Font("Times New Roman" ,Font.BOLD,12);
JOptionPane pobj=new JOptionPane();

l=new JLabel("Enter Access Code");
l.setForeground (Color.blue);
t=new TextField(10);
t.setEchoChar(' *');

l1=new JLabel("Friend Name");
l2=new JLabel("Cell Number");
l3=new JLabel("LandLin e");
l4=new JLabel("Address ");
l5=new JLabel("City");

cities=new Choice();
//cities.setBackg round(Color.yel low);
cities.setFont( font);
cities.addItem( "----------Select----------");
cities.addItem( "Hyderabad" );
cities.addItem( "Bangalore" );
cities.addItem( "Guntakal") ;
cities.addItem( "Chattisgar d");

t1=new TextField(17);
t1.setFont(font );
t1.setForegroun d(Color.blue);
//t1.setBackgroun d(Color.yellow) ;
t2=new TextField(17);
t2.setFont(font );
//t2.setBackgroun d(Color.yellow) ;
t3=new TextField(17);
t3.setFont(font );
t3.setForegroun d(Color.blue);
//t3.setBackgroun d(Color.yellow) ;
ta=new TextArea(3,17);
ta.setFont(font );
ta.setForegroun d(Color.blue);
//ta.setBackgroun d(Color.yellow) ;
l6=new JLabel("E - mail ");
t6=new TextField(17);
t6.setFont(font );
//t6.setBackgroun d(Color.yellow) ;
l7=new JLabel("Birthda y");
t7=new TextField(17);
t7.setFont(font );
//t7.setBackgroun d(Color.yellow) ;
add=new JButton("Insert ");
del=new JButton("Delete ");
query =new JButton ("Query");
update=new JButton("Update ");
exit=new JButton("Exit") ;
enter=new JButton("Enter" );
truncate=new JButton("Trunca te");

p1=new JPanel();
p1.setLayout(gb l2);
p1.setBackgroun d(Color.cyan);

gbc2.anchor=Gri dBagConstraints .CENTER;
gbc2.gridx=1;
gbc2.gridy=1;
gbl2.setConstra ints(l,gbc2);
p1.add(l);
gbc2.anchor=Gri dBagConstraints .CENTER;
gbc2.gridx=2;
gbc2.gridy=1;
gbl2.setConstra ints(t,gbc2);
p1.add(t);
gbc2.anchor=Gri dBagConstraints .CENTER;
gbc2.gridx=2;
gbc2.gridy=2;
gbl2.setConstra ints(enter,gbc2 );
p1.add(enter);
enter.addAction Listener(this);
//enter.addMouseL istener(this);
enter.setToolTi pText("Enter the required code in the Text Box and Click this button to go to the next page");

p2=new JPanel();
p2.setLayout(gb l3);
p2.setBackgroun d(Color.cyan);

gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=5;
gbc3.gridy=1;
gbl3.setConstra ints(truncate,g bc3);
p2.add(truncate );
truncate.setFon t(font);
truncate.setToo lTipText("Click this button to Truncate the data in the Database");
truncate.addAct ionListener(thi s);


gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=1;
gbl3.setConstra ints(l1,gbc3);
p2.add(l1);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=1;
gbl3.setConstra ints(t1,gbc3);
p2.add(t1);

gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=2;
gbl3.setConstra ints(l2,gbc3);
p2.add(l2);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=2;
gbl3.setConstra ints(t2,gbc3);
p2.add(t2);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=3;
gbl3.setConstra ints(l3,gbc3);
p2.add(l3);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=3;
gbl3.setConstra ints(t3,gbc3);
p2.add(t3);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=4;
gbl3.setConstra ints(l4,gbc3);
p2.add(l4);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=4;
gbl3.setConstra ints(ta,gbc3);
p2.add(ta);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=5;
gbl3.setConstra ints(l5,gbc3);
p2.add(l5);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=5;
gbl3.setConstra ints(cities,gbc 3);
p2.add(cities);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=6;
gbl3.setConstra ints(l6,gbc3);
p2.add(l6);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=6;
gbl3.setConstra ints(t6,gbc3);
p2.add(t6);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=7;
gbl3.setConstra ints(l7,gbc3);
p2.add(l7);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=7;
gbl3.setConstra ints(t7,gbc3);
p2.add(t7);

gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=1;
gbc3.gridy=8;
gbl3.setConstra ints(add,gbc3);
p2.add(add);
add.setFont(fon t);
add.setToolTipT ext("Click this button to Add the details you have entered to the Database");
add.addActionLi stener(this);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=2;
gbc3.gridy=8;
gbl3.setConstra ints(del,gbc3);
p2.add(del);
del.setFont(fon t);
del.setToolTipT ext("Click this button to Delete the details you have entered to the Database");
del.addActionLi stener(this);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=3;
gbc3.gridy=8;
gbl3.setConstra ints(query,gbc3 );
p2.add(query);
query.setFont(f ont);
query.setToolTi pText("Click this button to View the details of your Friends that you have entered in the Database");
query.addAction Listener(this);
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=4;
gbc3.gridy=8;
gbl3.setConstra ints(update,gbc 3);
p2.add(update);
update.setFont( font);
update.setToolT ipText("Click this button to Update the details of your Friends that you have entered in the Database");
update.addActio nListener(this) ;
gbc3.anchor=Gri dBagConstraints .CENTER;
gbc3.gridx=5;
gbc3.gridy=8;
gbl3.setConstra ints(exit,gbc3) ;
p2.add(exit);
exit.setFont(fo nt);
exit.setToolTip Text("Click this button to Exit ");
exit.addActionL istener(this);

//th=new Thread(this);
//th.start();

card.add(p1,"Pa nel1");
card.add(p2,"Pa nel2");
}
public void mousePressed(Mo useEvent me)
{
cl.next(card);
}
public void mouseClicked(Mo useEvent me)
{ }
public void mouseEntered(Mo useEvent me)
{ }
public void mouseExited(Mou seEvent me)
{ }
public void mouseReleased(M ouseEvent me)
{ }

public static void main(String args[])
{
Friends friends=new Friends();
try
{
Class.forName(" sun.jdbc.odbc.J dbcOdbcDriver") ;
con=DriverManag er.getConnectio n("jdbc:odbc:Fr iends","sa","jy otshna");
stat1=con.prepa reStatement("Se lect * from Friends where Name = ?");
}
catch(Exception e)
{
System.out.prin tln("Could not execute the query " + e);
}
}
/*public void run()
{
while(th!=null)
{
disp();
try
{
th.sleep(1000);
}
catch(Interrupt edException e)
{
getAppletContex t().showStatus( "Thread Interrupted");
}
}
}
public void disp()
{
date=new Date();
calendar=new GregorianCalend ar();
calendar.setTim e(date);
strTime=calenda r.get(Calendar. HOUR)+ ":" +(calendar.get( Calendar.MINUTE )) +":"+(calendar. get(Calendar.SE COND));
strDate=(calend ar.get(Calendar .MONTH)+1)+ ":" +calendar.get(C alendar.DATE)+" :"+calendar.get (Calendar.YEAR) ;
strStatus=strTi me+ " " +strDate;
getAppletContex t().showStatus( strStatus);
}*/
public void actionPerformed (ActionEvent ae)
{
Object obj=ae.getSourc e();
if(obj==enter)
{
String code;
code=t.getText( );
if(obj==enter)
if(code.length( )==0)
{
JOptionPane.sho wMessageDialog( frame ," Please . . .\n"+
"Enter the Access Code");
}
else if(code.equals( "Jyotshna") )
{
t.setText("");
cl.show(card,"P anel2");
}
else if(code.length( ) > 8 )
{
JOptionPane.sho wMessageDialog( frame ,"Access Code cannot exceed more than 8 digits . . . ");
}
else
{
JOptionPane.sho wMessageDialog( frame ," Sorry . . . \n" +
" Invalid Access Code");
return;
}
}
Object source=ae.getSo urce();
if(source==add)
{
String name,cell,landl ine,textarea,em ail,birthday;
name=t1.getText ();
cell=t2.getText ();
landline=t3.get Text();
textarea=ta.get Text();
email=t6.getTex t();
birthday=t7.get Text();
if(name.length( )==0)
{
pobj.showMessag eDialog(frame,( "Friends Name cannot be left blank") , "ErrorMessage", JOptionPane.ERR OR_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,"Friends Name cannot be left blank");
return;
}
if(cell.length( )==0)
{
pobj.showMessag eDialog(frame,( "Cell number is must . It cannot be left blank") , "ErrorMessage", JOptionPane.ERR OR_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,"Gender is must . It cannot be left blank");
return;
}
/*if(landline.le ngth()==0)
{
pobj.showMessag eDialog(frame,( "LandLine number is must . It cannot be left blank") , "ErrorMessage", JOptionPane.ERR OR_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,"Gender is must . It cannot be left blank");
return;
}
if(textarea.len gth()==0)
{
pobj.showMessag eDialog(frame,( "Address is must . It cannot be left blank") , "ErrorMessage", JOptionPane.ERR OR_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,"Gender is must . It cannot be left blank");
return;
}
if(email.length ()==0)
{
pobj.showMessag eDialog(frame,( "E - mail address is must . It cannot be left blank") , "ErrorMessage", JOptionPane.ERR OR_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,"Gender is must . It cannot be left blank");
return;
}*/
try
{
//Class.forName(" sun.jdbc.odbc.J dbcOdbcDriver") ;
con=DriverManag er.getConnectio n("jdbc:odbc:Fr iends","sa","jy otshna");
stat=con.prepar eStatement("Ins ert into Friends(Name,Ce ll,LandLine,Add ress,City,E_mai l,Birthday) values(?, ?, ?, ?, ?, ?, ?)");
stat.setString( 1,t1.getText()) ;
stat.setString( 2,t2.getText()) ;
stat.setString( 3,t3.getText()) ;
stat.setString( 4,ta.getText()) ;
stat.setString( 5,(String)citie s.getSelectedIt em());
stat.setString( 6,t6.getText()) ;
stat.setString( 7,t7.getText()) ;
stat.executeUpd ate();
pobj.showMessag eDialog(frame,( " Congratulations ! ! ! \n" +
"Your Details have been added to the Database") , "Successful l Message",JOptio nPane.INFORMATI ON_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,new String ("Congratulatio ns ! ! ! Your Details have been Accepted"));
t1.setText("");
t2.setText("");
t3.setText("");
ta.setText("");
//cities.setText( "-----Select----");
t6.setText("");
t7.setText("");
}
catch(Exception exception)
{
pobj.showMessag eDialog(frame,( " Sorry . . . \n" +
"Record has not been Added to the Database" ) , "Error Message",JOptio nPane.ERROR_MES SAGE);
//JOptionPane.sho wMessageDialog( frame,new String("Error occured while entering Data into the Database" +exception));
}
}
if(source == del)
{
String name;
name=t1.getText ();
if(name.length( )==0)
{
pobj.showMessag eDialog(frame,( "Friends Name cannot be left blank") , "Error Message",JOptio nPane.ERROR_MES SAGE);
//JOptionPane.sho wMessageDialog( frame,"Friends Name cannot be left blank");
return;
}
try
{
//Class.forName(" sun.jdbc.odbc.J dbcOdbcDriver") ;
con=DriverManag er.getConnectio n("jdbc:odbc:Fr iends","sa","jy otshna");
stat=con.prepar eStatement("Del ete Friends where Name = ? ");
stat.setString( 1,t1.getText()) ;
stat.executeUpd ate();
pobj.showMessag eDialog(frame,( "The Details that you have entered have been Deleted in the Database") , "Informatio n Message",JOptio nPane.INFORMATI ON_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,new String("The Details that you have entered have been Deleted in the Database"));
t1.setText("");
t2.setText("");
t3.setText("");
ta.setText("");
t6.setText("");
t7.setText("");
}
catch(Exception e)
{
JOptionPane.sho wMessageDialog( frame,new String("Error occured while deleting the Data from the Database" +e));
}
}
if(source == update)
{
String name;
name=t1.getText ();
if(name.length( )==0)
{
pobj.showMessag eDialog(frame,( "Friends Name cannot be left blank") , "Error Message",JOptio nPane.ERROR_MES SAGE);
//JOptionPane.sho wMessageDialog( frame,"Friends Name cannot be left blank");
return;
}
try
{
Class.forName(" sun.jdbc.odbc.J dbcOdbcDriver") ;
con=DriverManag er.getConnectio n("jdbc:odbc:Fr iends","sa","jy otshna");
//stat=con.prepar eStatement("Upd ate Friends set(Name=?,Cell =?,LandLine=?,A ddress=?,City=? ,E_mail=?,Birth day=? where Name=?)");
stat=con.prepar eStatement( "Update Friends set Cell=? LandLine=? Address=? City=? E_mail=? Birthday=? where Name=?");
stat.setString( 1,t1.getText()) ;
stat.setString( 2,t2.getText()) ;
stat.setString( 3,t3.getText()) ;
stat.setString( 4,ta.getText()) ;
stat.setString( 5,(String)citie s.getSelectedIt em());
stat.setString( 6,t6.getText()) ;
stat.setString( 7,t7.getText()) ;
stat.executeUpd ate();
pobj.showMessag eDialog(frame,( "UPDATED ") , "Informatio n Message",JOptio nPane.INFORMATI ON_MESSAGE);
//JOptionPane.sho wMessageDialog( frame,new String("The details that you have entered have been deleted in the database successfully")) ;
}
catch(Exception e)
{
JOptionPane.sho wMessageDialog( frame,new String(""+e));
//JOptionPane.sho wMessageDialog( frame,new String(" Sorry !" +e));
}
}
if(source==exit )
{
System.exit(0);
}
if(source==quer y)
{
try
{
String name,gender;
name=t1.getText ();
if(name.length( )==0)
{
JOptionPane.sho wMessageDialog( frame,"Friends Name cannot be left blank");
return;
}
stat1.setString (1,t1.getText() );
result=stat1.ex ecuteQuery();
result.next();
}
catch(Exception e)
{
JOptionPane.sho wMessageDialog( frame,"Could not execute the Query"+e );
}
showRecord(resu lt);
}
}
public void showRecord(Resu ltSet result)
{
try
{
t1.setText(resu lt.getString(1) );
t2.setText(resu lt.getString(2) );
t3.setText(resu lt.getString(3) );
ta.setText(resu lt.getString(4) );
//cities.setText( result.getStrin g(5));
t6.setText(resu lt.getString(6) );
t7.setText(resu lt.getString(7) );
}
catch(Exception e)
{
JOptionPane.sho wMessageDialog( frame," Sorry . . . \n" +
"The ' NAME ' you entered does not exists in the Database");

//JOptionPane.sho wMessageDialog( frame,"The NAME you entered does not exists in the Database "+ e);
}

}
}