SQLException : The Network Adapter could not establish connection

[Tapan Prajapati]

hii,

I am using Windows Vista 32bit o/s , installed Software Oracle 11.2.0.1
i am able to execute oracle Type 1 driver by using odbc connection

Now i want to connect my Java Application with My Oracle Database Software by Type 4 mechanism
i successfully added "OJDBC6.JAR" file in my class path
while executing code i got an SqlException : The Network Adapter could not establish connection

here is my code..

/* Checking Connection with Type 4 Oraclejdbc Driver*/
import java.sql.DriverManager;
import java.sql.Connection;

public class OraTestType4
{
	public static void main(String[] args) 
	{
		try
		{
			/*
			Try
					DriverManager.registerDriver( new oracle.jdbc.driver.OracleDriver());
					Connection connection = DriverManager.getConnection("jdbc racle:thin:@202.201.57:1521:myoracle","USER","PASSWORD"); 
			*/
		
		//loading clss from 
		Class.forName("oracle.jdbc.driver.OracleDriver");
		//	DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
		// Establishing connectiion with Data base software
		Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","tiger");

		if (con==null)
			System.out.println("Connection with Database software is not establish...");
		else 
			System.out.println("Connection successfully establish...");
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}

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