Java – can I add keys / values to a map in a map in one line of code?

I have HashMap 1, which contains five keys. All keys have hashmaps as the value I want to add key / value pairs to these sub maps

map1.get(subCategoryMap).put(newKey,newValue);

My idea is:

map1.get(subCategoryMap);

Return to another map I can divide this line into two lines and have:

map2 = map1.get(subCategoryMap);
map2.put(newKey,newValue);

But I prefer one step That's why I tried

map1.get(subCategoryMap).put(newKey,newValue);

This doesn't work (I don't like. Put() on objects) Can I access the sub map and add it to the same line of code above me, or do I need to split it into 2 lines?

Solution

Using generics, you can:

Map<String,Map<String,String>> map1 = ...
map1.get(category).put(subcategory,value);

If the map is not universal:

Map map1 = ...
((Map)map1.get(category)).put(subcategory,value);