将HashMap放入HashMap中,然后填充两个映射.

Question

我必须为sql插件编写一个脚本.我拥有编写插入内容所需的所有信息,但我使用的信息有三种,而不仅仅是两种.我知道我必须在Map中放置一个Map,但是当我尝试将任何东西放入地图时,我收到了编译错误.

HashMap<String,String> acctyp = new HashMap<String,String>();
HashMap<String, HashMap<String,String>> gens = new HashMap<String,HashMap<String,String>>();
gens.put("'GEN01'", acctyp.put("'Open'","ACCTYP 01"));
gens.put("'GEN02'", acctyp.put("'Sheltered'","ACCTYP 02"));
gens.put("'GEN03'", acctyp.put("'Spousal sheltered'","ACCTYP 03"));
gens.put("'GEN06'", acctyp.put("'Education'","ACCTYP 06"));
gens.put("'GEN12'", acctyp.put("'Non-ded. sheltered'","ACCTYP 12"));
gens.put("'GEN30'", acctyp.put("'Structured Product'","ACCTYP 30"));
gens.put("'GEN31'", acctyp.put("'Emergency Cash'","ACCTYP 31"));
gens.put("'GEN85'", acctyp.put("'Insurance Savings'","ACCTYP 85"));
gens.put("'GEN86'", acctyp.put("'Stock Option'","ACCTYP 86"));
gens.put("'GEN94'", acctyp.put("'Business Other'","ACCTYP 94"));
gens.put("'GEN95'", acctyp.put("'Personal use'","ACCTYP 95"));
gens.put("'GEN97'", acctyp.put("'Universal Life'","ACCTYP 97"));

如果有人知道为什么我在put上遇到编译错误,那么我将非常感激.

Answer 1

Map.put返回一个字符串.gens正在映射String到HashMap.你正在打电话gens.put(string, string),而应该打电话gens.put(string, HashMap<string,string>)

您的代码应为:

HashMap<String,String> acctyp = new HashMap<String,String>();
HashMap<String, HashMap<String,String>> gens = new HashMap<String,HashMap<String,String>>();
acctyp.put("'Open'","ACCTYP 01");
gens.put("'GEN01'", acctyp);