java - 如何在 Map java 中允许重复值？

Question

我正在使用 Autocompletetextview，所以我希望显示重复名称...该名称来自服务器...我尝试了下面的一些 Java 代码示例，但它不起作用...

public class EmptyActivity extends AppCompatActivity {

    LinkedHashMap<String, ArrayList<String>> hashMap_searchresult = new LinkedHashMap<String, ArrayList<String>>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_empty);
        hashMap_searchresult.clear();

        hashMap_searchresult.put("a1",new ArrayList<String>(Arrays.asList("a","b","c","d")));
        hashMap_searchresult.put("a1",new ArrayList<String>(Arrays.asList("e","f","g","h")));

        for (Map.Entry<String, ArrayList<String>> entry : hashMap_searchresult.entrySet()) {
            String key = entry.getKey();
            ArrayList<String> value2222 = entry.getValue();
            Log.e("checkstatus"," key    " + key + " value : " + value2222.toString());
        }
    }
}

This is the Output getting

key : a1 value : [e, f, g, h]

---

But i want output below like this

 key :  a1  value : [a, b, c, d]
 key :  a1  value : [e, f, g, h]

谁能告诉我应该用什么做这个？

Answer 1

这越来越丑陋了，但你能不能给你一张列表列表的 map :

LinkedHashMap<String, List<List<String>>> hashMap_searchresult = new LinkedHashMap<>();

List<List<String>> list = new ArrayList<>();
list.add(new ArrayList<String>(Arrays.asList("a", "b", "c", "d")));
list.add(new ArrayList<String>(Arrays.asList("e", "f", "g", "h")));
hashMap_searchresult.put("a1", list);

for (Map.Entry<String, List<List<String>>> entry : hashMap_searchresult.entrySet()) {
    String key = entry.getKey();
    List<List<String>> value2222 = entry.getValue();
    for (List<String> lst : value2222) {
        String[] arr = new String[list.size()];
        arr = lst.toArray(arr);
        System.out.println("checkstatus" + " key    " + key + " value : " + Arrays.toString(arr));
    }
}

Demo