Problem with Jdk1.4 and Linux

When i try to execute this code:

Start code ------------------------------------------------------

package untitled1;

/**
 * A demo program to show how jdbc works with postgresql
 * Nick Fankhauser 10/25/01
 * nickf@ontko.com or nick@fankhausers.com
 * This program may be freely copied and modified
 * Please keep this header intact on unmodified versions
 * The rest of the documentation that came with this demo program
 * may be found at http://www.fankhausers.com/postgresql/jdbc
 */



import java.sql.*;   // All we need for JDBC
import java.text.*;
import java.io.*;

public class HelloPostgresql
{
  Connection       db;        // A connection to the database
  Statement        sql;       // Our statement to run queries with
  DatabaseMetaData dbmd;      // This is basically info the driver delivers
                              // about the DB it just connected to. I use
                              // it to get the DB version to confirm the
                              // connection in this example.

  public HelloPostgresql(String argv[])
    throws ClassNotFoundException, SQLException
  {
    String database = argv[0];
    String username = argv[1];
    String password = argv[2];
    String ip       = argv[3];
    Class.forName("org.postgresql.Driver"); //load the driver
    db = DriverManager.getConnection("jdbc:postgresql://"+ ip + "/"+database,
                                     username,
                                     password); //connect to the db
    dbmd = db.getMetaData(); //get MetaData to confirm connection
    System.out.println("Connection to "+dbmd.getDatabaseProductName()+" "+
                       dbmd.getDatabaseProductVersion()+" successful.\n");
    sql = db.createStatement(); //create a statement that we can use later


    String sqlText = "create table jdbc_demo (code int, text varchar(20))";
    System.out.println("Executing this command: "+sqlText+"\n");
    sql.executeUpdate(sqlText);


    sqlText = "insert into jdbc_demo values (1,'One')";
    System.out.println("Executing this command: "+sqlText+"\n");
    sql.executeUpdate(sqlText);


    sqlText = "insert into jdbc_demo values (3,'Four')";
    System.out.println("Executing this command twice: "+sqlText+"\n");
    sql.executeUpdate(sqlText);
    sql.executeUpdate(sqlText);


    sqlText = "update jdbc_demo set text = 'Three' where code = 3";
    System.out.println("Executing this command: "+sqlText+"\n");
    sql.executeUpdate(sqlText);
    System.out.println (sql.getUpdateCount()+
                        " rows were update by this statement\n");


    System.out.println("\n\nNow demostrating a prepared statement...");
    sqlText = "insert into jdbc_demo values (?,?)";
    System.out.println("The Statement looks like this: "+sqlText+"\n");
    System.out.println("Looping three times filling in the fields...\n");
    PreparedStatement ps = db.prepareStatement(sqlText);
    for (int i=10;i<13;i++)
    {
      System.out.println(i+"...\n");
      ps.setInt(1,i);         //set column one (code) to i
      ps.setString(2,"HiHo"); //Column two gets a string
      ps.executeUpdate();
    }
    ps.close();



    System.out.println("Now executing the command: "+
                       "select * from jdbc_demo");
    ResultSet results = sql.executeQuery("select * from jdbc_demo");
    if (results != null)
    {
      while (results.next())
      {
        System.out.println("code = "+results.getInt("code")+
                           "; text = "+results.getString(2)+"\n");
      }
    }
    results.close();


    sqlText = "drop table jdbc_demo";
    System.out.println("Executing this command: "+sqlText+"\n");
    sql.executeUpdate(sqlText);


    db.close();
  }

  public static void correctUsage()
  {
    System.out.println("\nIncorrect number of arguments.\nUsage:\n "+
                       "java   \n");
    System.exit(1);
  }

  public static void main (String args[])
  {
    if (args.length != 4) correctUsage();
    try
    {
      HelloPostgresql demo = new HelloPostgresql(args);
    }
    catch (Exception ex)
    {
      System.out.println("***Exception:\n"+ex);
      ex.printStackTrace();
    }
  }
}

end code ------------------------------------------------------

I get the following error:

Start error report ------------------------------------------------------

org.postgresql.util.PSQLException: Il tentativo di connessione è fallito perché Exception: java.net.SocketException: Invalid argument or cannot assign requested address
Stack Trace:

java.net.SocketException: Invalid argument or cannot assign requested address
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
        at java.net.Socket.connect(Socket.java:452)
        at java.net.Socket.connect(Socket.java:402)
        at java.net.Socket.<init>(Socket.java:309)
        at java.net.Socket.<init>(Socket.java:124)
        at org.postgresql.core.PGStream.<init>(PGStream.java:47)
        at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:197)
        at org.postgresql.Driver.connect(Driver.java:139)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at untitled1.HelloPostgresql.<init>(HelloPostgresql.java:36)
        at untitled1.HelloPostgresql.main(HelloPostgresql.java:118)
End of Stack Trace

        at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:208)
        at org.postgresql.Driver.connect(Driver.java:139)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at untitled1.HelloPostgresql.<init>(HelloPostgresql.java:36)
        at untitled1.HelloPostgresql.main(HelloPostgresql.java:118)
***Exception:
org.postgresql.util.PSQLException: Il tentativo di connessione è fallito perché Exception: java.net.SocketException: Invalid argument or cannot assign requested address
Stack Trace:

java.net.SocketException: Invalid argument or cannot assign requested address
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
        at java.net.Socket.connect(Socket.java:452)
        at java.net.Socket.connect(Socket.java:402)
        at java.net.Socket.<init>(Socket.java:309)
        at java.net.Socket.<init>(Socket.java:124)
        at org.postgresql.core.PGStream.<init>(PGStream.java:47)
        at org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:197)
        at org.postgresql.Driver.connect(Driver.java:139)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at untitled1.HelloPostgresql.<init>(HelloPostgresql.java:36)
        at untitled1.HelloPostgresql.main(HelloPostgresql.java:118)
End of Stack Trace

end error report ------------------------------------------------------

I am sure that this code is working because same code and library used to connect to the same server but with windowsxp work perfectly.

I have tried a lot of combination:

Windows:

Work with jdk1.4 and 1.5 without any problem

Linux:

jdk 1.4.2_04-b05 do not work
jdk1.5.0_04 all works perfect

I have tried to use the jdbc driver 8.1dev, 8.0, 7.x but with all version the same error if i use the jdk1.4.

I have also tried to change the machine but the problem do not solve:

64bit AMD64     Fedora core 4 kernel-2.6.11-1.1369_FC4
32bit Pentium-M Fedora core 4 kernel-2.6.11-1.1369_FC4

Thank you very much
(and sorry for the bad english :)

Daniele Panozzo