Thread: Prepared Statement exceptions please help

exception
java.lang.NullPointerException
at jdbcstatements.Insertion.main(Insertion.java:37)
Exception in thread "main" java.lang.NullPointerException
at jdbcstatements.Insertion.main(Insertion.java:50)
my code

package jdbcstatements;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
 
import java.sql.SQLException;
 
import oracle.jdbc.OraclePreparedStatement;
 
 
 
public class Insertion {
 
	/**
	 * @param args
	 * @throws SQLException 
	 * 
	 */
	public static Connection getConnection()throws Exception{
 
	      Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
	      String url="jdbc:oracle:thin:@localhost:1521:orcl";
 
	    Connection  con=DriverManager.getConnection(   url,   "scott", "tiger");
	      System.out.println("connection created");
	 return con;
	}
	public static void main(String[] args) throws SQLException {
 
		Connection con=null;
		OraclePreparedStatement pstmt = null;
 
		try {
 
		      String query = "insert into EMP(ENAME, JOB, SAL) values(?, ?, ?)";
System.out.println("insert the record");
		      pstmt = (OraclePreparedStatement) con.prepareStatement(query); // create a statement
 
		      pstmt.setString(1, "Navatha"); // set input parameter 2
		      pstmt.setString(2, "Manger"); // set input parameter 3
		      pstmt.setString(3, "3000");
		      pstmt.executeUpdate();
 
 
 
 
		   } catch(Exception e){e.printStackTrace();}
 
		finally {
		      pstmt.close();
		      con.close();
		    }
	}
 
}