findRes

public String[] findRes(String nameRes) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            String name = "it_56070014";
            String password = "4a3DskLl2b";
            String url = "jdbc:mysql://database.it.kmitl.ac.th:3306/it_56070014?zeroDateTimeBehavior=convertToNull";
            Connection conn;
            conn = DriverManager.getConnection(url, name, password);
            if (nameRes.equals("")) {
                String res[] = new String[1000];
                int i = 0;
                Statement stmt = conn.createStatement();
                String sql = "SELECT research_name from researchs";
                ResultSet rs = stmt.executeQuery(sql);
                while (rs.next()) {
                    res[i] = rs.getString("research_name");
                    i++;
                }
                return res;
            } else {
                String words;
                Statement stmt = conn.createStatement();
                String sql = "SELECT research_name from researchs where research_name like '%" +nameRes+ "%'"  ;
                ResultSet rs = stmt.executeQuery(sql);
                int count = 0;
                String wordsAll[] = new String[100];
                while (rs.next()) {
                    wordsAll[count] = rs.getString("research_name");
                    count++;
                }
                return wordsAll;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new String[0];
    }