JDBC Without Creating DSN

&import java.sql.*;

public class FirstJDBC
{
public static void main(String arg[])
{
try
{
/*Registering Driver*/
DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
/*Creating Connection*/
Connection con= DriverManager.getConnection("jdbc:oracle:thin:@hostname:1521:database","Username","Password");
Statement st=con.createStatement();
ResultSet result=st.executeQuery("Select * from table_name");
while(result.next())
{
System.out.println(result.getInt(1));
System.out.println(result.getString(2));
System.out.println(result.getString(3));
}
}
catch(Exception expObj)
{System.out.print(expObj);}
}
}

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