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Is it necessary to close connection and statement when method terminates?
void databaseCall() {
    Connection con = null;
    Statement statement = null
    try {
          con = getConnection(...);
          statement = con.createStatement(...);
          // do some query
    } catch (SQLException e) {
         // bla bla
    } finally {
         try {con.close();} catch (Exception e1) {}
         try {statement.close();} catch (Exception e1) {}
    }
}