JDBC Error - The Network Adapter could not establish the connection

Posted on 2003-10-22
Last Modified: 2007-12-19

Hi all,

   I appreciate if anyone could help me out with my issue. I wrote simple java code on win 2000 to test whether I will be able to access Oracle 8i DB resided at some machine within the network.

The code is:

  DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
  Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@","user","password");

The fist line here is executing and the problem is with second line of code. After executing this application from my DOS window, I am getting error:

java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
        at oracle.jdbc.dbaccess.DBError.throwSqlException(
        at oracle.jdbc.dbaccess.DBError.throwSqlException(
        at oracle.jdbc.dbaccess.DBError.throwSqlException(
        at oracle.jdbc.driver.OracleConnection.<init>(
        at oracle.jdbc.driver.OracleDriver.getConnectionInstance(
        at oracle.jdbc.driver.OracleDriver.connect(
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at DBConn.getConn(
        at DBConn.main(

I have installed Oracle client, where I can access the same database using SQL * Plus, but why I am unable to access the database from a Java Application? Do I need any web/application server to access it?

Question by:chandubcs

Accepted Solution

savalou earned 125 total points
ID: 9599547
Isn't the default oracle port 1521?  Did you change it on purpose?

Author Comment

ID: 9599611
Yeah... I am sorry, I was using the port number as 1526, I need to use 1521... Thanks much
LVL 92

Expert Comment

ID: 10194163
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