sql exception when connecting to oracle database
When trying to connect to an oracle database using the code below i get an sql error. i put the code below it and the stack trace below the code. any help would be great
Connection connection =null;
try{
// Load the JDBC driver
String driverName ="oracle.jdbc.driver.OracleDriver";
Class.forName(driverName);
// Create a connection to the database
String serverName ="192.168.0.2";
String portNumber ="1158";
String sid ="orcl";
String url ="jdbc:oracle:thin:@" + serverName +":" + portNumber +":" + sid;
// String url = "jdbc:oracle:oci:@orcl";
String username ="system";
String password ="mmsi";
connection = DriverManager.getConnection(url, username, password);
}catch (ClassNotFoundException e){
System.out.println("Class Not Found Exception in connection to db");
}catch (SQLException e){
System.out.println("SQL Exception in connecting to Database ");
e.printStackTrace();
}
stackTrace
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
SQL Exception in connecting to Database
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)
before this.start
got to doaction
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:420)
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:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at mmsiserver.conversation.<init>(conversation.java:190)
at mmsiserver.Server.run(Server.java:105)
Exception in thread"Thread-0" java.lang.NullPointerException
at mmsiserver.conversation.doAction(conversation.java:218)
at mmsiserver.conversation.<init>(conversation.java:202)
at mmsiserver.Server.run(Server.java:105)
Message was edited by:
pcpitcher1
