public static void updatePolicy(String membership_status, String policy_type, float value) { ResultSet rs; String str = "update policies set " + policy_type + " = '" + value + "' where membership_status = '" + membership_status + "'"; DBConnections.query = str; int ret = DBConnections.openDbConnectionForUpdate(DBConnections.query); DBConnections.closeDbConnection(); if (ret == 1) { System.out.println("Policy update\n"); DBQueries.listPolicy(); } }