What is wrong with the create map method given below?
public static HashMap<String, String> createMap() {
       HashMap<String, String> hashMap = new HashMap<String, String>();
       hashMap.put("last","Peter");
       hashMap.put("last","Andy");
       hashMap.put("last","Brody");
       hashMap.put("last","Mike");
       hashMap.put("last","Lance");
       hashMap.put("last","Peter");
       hashMap.put("last","Peter");
       hashMap.put("last","Peter");
       hashMap.put("last","Peter");
       hashMap.put("last","Peter");
       return hashMap;