SetValuedMap<String,String> setValuedMap = new HashSetValuedHashMap();
setValuedMap.put("United States", "Washington");
setValuedMap.put("Canada", "Ottawa");
setValuedMap.put("Canada", "Ottawa");
setValuedMap.put("South Africa", "Pretoria");
setValuedMap.put("South Africa", "Cape Town");
setValuedMap.put("South Africa", "Bloemfontein");
System.out.println(setValuedMap); // Values being added to the Set and hence doesn't allow duplicates
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