java - 结果集到数组并使用方法返回

Question

1. 这是我的数据库类方法的代码，用于在结果集中获取数据并返回一个通用数组，我在数据库中只有一个字段。

2. 问题：我无法获取数组 abc[] 及其内容，当我返回时它还显示 arrayIndexoutOfBond 错误“AWT-EventQueue-0” java.lang.ArrayIndexOutOfBoundsException: 1

   public String[] getTableContents(String tableName) {
       ResultSet results = null;
       String[] abc = null;
       int a = 0;
       try {
           System.out.println(conn);
           stmt = conn.createStatement();
           results = stmt.executeQuery("select * from " + tableName);
           ResultSetMetaData rsmd = results.getMetaData();
           // int numberCols = rsmd.getColumnCount();
           for (int i = 1; i <= rsmd.getColumnCount(); i++) {
               // print Column Names
               System.out.print(rsmd.getColumnLabel(i) + "\t\t");
           }
           System.out.println("\n----------------------------------------");
   
           while (results.next()) {
               System.out.println(results.getString(2) + " 1");
               String em = (results.getString(2));
               System.out.println(em + " 2");
               abc = em.split(" ");
               System.out.println(abc + " 3");
           }
           results.close();
           stmt.close();
   
       } catch (SQLException suresh) {
           System.out.println(suresh);
       }
       System.out.println(abc + " 4");
   
       return abc;
   }