Maps

gistfile1.java

    Map<String, String> map = new TreeMap<String, String>();

        map.put("WI", "Wisconsin");
        map.put("MN", "Wisconsin");
        map.put("MI", "Wisconsin");
        map.put("IA", "Wisconsin");

        for (Map.Entry<String, String> entry : map.entrySet()) {

            System.out.println("Key: " + entry.getKey()
                    + ", value: " + entry.getValue());

    }