Problem in connecting with Oracle

hi everybody
I have a problem in connecting with Oracle express 10g. I got an error that doesn't allow me to connect. hope anyone can help me and solve this problem
--------------------Configuration: test - JDK version 1.6.0_20 <Default> - <Default>--------------------
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at DB.dbConnect(test.java:36)
at test.main(test.java:18)
this is the code that I'm following
import java.io.*; import java.sql.*; public class test2 { public static void main(String[] args) { try { Connection con=null; Class.forName("oracle.jdbc.driver.OracleDriver"); con=DriverManager.getConnection( "jdbc:oracle:thin:@PLANET:1521:ORCL", "scott", "tiger"); Statement s=con.createStatement(); s.execute("INSERT INTO BOOKS VALUES('A Tale of Two Cities','William Shakespeare',4567891231,'05-JAN-1962')"); s.close(); con.close(); } catch(Exception e){e.printStackTrace();} } }
Edited by: Vantasia on Nov 12, 2010 10:18 AM

1. Is the connection url correct?
"jdbc:oracle:thin:@PLANET:1521:ORCL" is fine.
2. Is the TNS listener started?
c:\oracle\product\ora10\bin> lsnrctl status
3. Is a firewall between client and database server?
Connection url with firewall would be different.
http://download.oracle.com/docs/cd/B28359_01/java.111/b31224/jdbcthin.htm#i1004276

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