Help me to Choose Collections

Hi
I need to store a single key multiple values,how i want a collection is

key1,value1,value2,value3....
key2,value1,value2....

please suggest me a suitable collection for the above scenario and help me how to retrieve those values
for eg
for the first iteration my output should be

key1
value1,value2,value3

for the second iteration my output should be
key1
value1,value2
Please help me.. thanks in advance

A Map that contains a List as the value. Something like:

Code :

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Map<String, List<String>> map = new HashMap<String, List<String>>();
List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
map.put("First", list);

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