How to iterate Hashmap with containing arraylist [duplicate]

问题

This question already has answers here:

Closed 7 years ago.

Possible Duplicate:
How do I iterate over each Entry in a Map?

i have map like

HashMap<Integer, ArrayList<String>> map = = new HashMap<Integer, ArrayList<String>>();

i want iterate this type of map please give me example how to iterate this map

回答1:

for (Map.Entry<String, ArrayList<String>> entry : map.entrySet()) {
    String key = entry.getKey();
    ArrayList<String> value = entry.getValue();
    for(String aString : value){
        System.out.println("key : " + key + " value : " + aString);
    }
}

回答2:

You can do like this:

for (Integer i : map.keySet())
   for (String s : map.get(i))
      System.out.println("key :" + i + " value: " + s);

来源：https://stackoverflow.com/questions/10562834/how-to-iterate-hashmap-with-containing-arraylist