Question

i am trying to execute a sql command from a java program..i dont have any errors regarding this code..but i am facing connection refusals from the database..

import java.sql.*;
public class DBCreateTable
{
    public static void main(String args[]) throws Exception
    {
        DriverManager.registerDriver (new Oracle.jdbc.driver.OracleDriver());
        Connection con=DriverManager.getConnection(
              "jdbc:oracle:thin:@localhost:1521:xe","lms","abc");
        Statement stmt=con.CreateStatement();
        stmt.executeUpdate("create table emp(eno number(5),name varchar2(20))");
    }
}

the errors encountered are:

Exception in thread "main" java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=185599488)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)
        at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:404)
       at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:468)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
        at java.sql.DriverManager.getConnection(DriverManager.java:579)
        at java.sql.DriverManager.getConnection(DriverManager.java:221)
        at DBCreateTable.main(DBCreateTable.java:7)

In my sql commands i have done the following..

    SQL> connect system/tiger;
    SQL> create user lms identified by abc;
    SQL> grant connect,resource to lms;

and plz tell me what is scott tiger..i am messing a lot there..what users are there..what to unlock and how?? plz thanks..

Answer 1

your code

Connection con=DriverManager.getConnection(
          "jdbc:oracle:thin:@localhost:1521:xe","lms","abc");

change it to

Connection con=DriverManager.getConnection(
          "jdbc:oracle:thin:@//localhost:1521:xe","lms","abc");

For more information you can see

http://www.orafaq.com/wiki/JDBC

Another change is needed

stmt.executeUpdate("create table emp(eno number(5),name varchar2(20))");

change to

stmt.executeUpdate("create table emp(eno number(5),name varchar2(20));");