Error in connecting Oracle Database from JAVA application!!!

Question

Hi,
I am trying to connect to the Oracle11g database server from the client machine using JAVA eclipse. I have installed the oracle client in the client machine. Once i try to execute the below code it was throwing below error:
public class Dbconnect {
public static void main (String[] args)throws Exception {
try {
Class.forName ("oracle.jdbc.driver.OracleDriver");
String connectString = "jdbc:oracle:thin:@<IP Address>:1521:orcl";
OracleDriver drivers = new OracleDriver();
System.out.println(drivers);
Connection connection = null;
connection = (OracleConnection)DriverManager.getConnection(connectString,"ADMIN", "admin");
System.out.println(connection);
System.out.println("Connected to the database");
Error:
java.sql.SQLException: The Network Adapter could not establish the connection
     at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:412)
     at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
     at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
     at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
     at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at DBConnect.main(DBConnect.java:15)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
     at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:359)
     at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:422)
     at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:672)
     at oracle.net.ns.NSProtocol.connect(NSProtocol.java:237)
     at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
     at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
     ... 7 more
Caused by: java.net.ConnectException: Connection refused: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:141)
     at oracle.net.nt.ConnOption.connect(ConnOption.java:123)
     at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:337)
     ... 12 more
I am unable to connect using sqlplus as well ORA-12560: TNS:protocol adapter error
Please advise me on how to resolve this issue..
Thanks

Answer 1

Prabhu wrote:
We are not able to connect from SQLplus as we.. If i issue this command in Sqlplus from client machine 'sqlplus admin/admin@'(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=<Ip Adddress>)(PORT=1521)))(CONNECT_DATA=(SID=orcl)))'' it was throwing the below error.
Error: ORA-12541: TNS:no listener
Do i need add get any config details in the client machine..
Could please tell me what is the general procedure to access the DB server from client machine..on DB Server issue following OS commands
lsnrctl start
lsnrctl status
lsnrctl service
COPT commands & results, then PASTE all back here