Файл Java-программы для проверки связи через JDBC

import java.sql.*;

import oracle.jdbc.driver.*;

public class StaffByJDBC

{

public static void main(String[] args)

     {

          String url = null;

           if (args.length > 0) {

           if (args[0].compareToIgnoreCase("thin") == 0) {

                 url = "jdbc:oracle:thin:@localhost:1521:TEACHER";

          }

          else if (args[0].compareToIgnoreCase("oci") == 0) {

                url = "jdbc:oracle:oci8:@TEACHER";

          }

          else if (args[0].compareToIgnoreCase("kprb") == 0) {

               url = "jdbc:oracle:kprb:";

}

}

if (url == null) {

System.out.println("usage: StaffByJDBC [thin|oci]");

return;

}

try {

    DriverManager.registerDriver (

        new oracle.jdbc.driver.OracleDriver());

}

catch (Exception e) { return; }

try {

Connection cn =

            DriverManager.getConnection (url,"scott","tiger");

Statement st = cn.createStatement();

                st.executeQuery ("SELECT empno, ename FROM emp");

while (rs.next()) {

     System.out.println("Number=" + rs.getString(1) + " " +

                             "Name=" + rs.getString(2));

}

st.close();

cn.close();

}

catch (Exception e) { return; }

finally { System.out.println("All that happened"); }

}

}