java.sql.SQLException: The Network Adapter could not establish the connection

[Tapan1]

try
        {
              Class.forName("oracle.jdbc.driver.OracleDriver");
              Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "scott", "tiger");
              if (con == null)
                  System.out.println("Connection not successful");
              else
                  System.out.print("successful....");
              con.close();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

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(DriverManager.java:579)
	at java.sql.DriverManager.getConnection(DriverManager.java:221)
	at Orajdbc.main(Orajdbc.java:20)
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.DualStackPlainSocketImpl.waitForConnect(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:75)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:337)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:198)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
	at java.net.Socket.connect(Socket.java:579)
	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 using windows vista 32 bit Business version
Jdk 1.6
Oracle Driver "ojdbc6.jar" set in classpath enviroument variable
Oracle 11.2.0.1

[~s.o.s~]

Is the database really running on the port 1521 of your machine? Are you able to connect to that SID using SQL Developer?

[sohanlal.maurya]

I am facing this problem ...so plz help me anybody

[stultuske]

Sohanlal: you are facing what problem?
start a new thread and post the exact error YOU get in there. don't continue this thread, since it's a dead thread that shouldn't have been revived.