Shallow copy of a Map in Java

Question

As I understand it, there are a couple of ways (maybe others as well) to create a shallow copy of a Map in Java:

Map data          


        

Answer 1

Copy a map without knowing its implementation:

static final Map shallowCopy(final Map source) throws Exception {
    final Map newMap = source.getClass().newInstance();
    newMap.putAll(source);
    return newMap;
}