一个联系人下多个号码去重复

public class Test {

  public static void main(String[] args) {
    Map<String ,List<String>> map = new HashMap<String ,List<String>>();
    Set<String> nameSet = new HashSet<String>();
    List<Contract> list = getContracts();
    for(Contract c : list){
      nameSet.add(c.getName());
    }
    for(String name : nameSet){
      List<String> phones = new ArrayList<String>();
      for(Contract c : list){
        if(name.equals(c.getName())){
          phones.add(c.getPhone());
        }
      }
      map.put(name, phones);
    }
    System.out.println(map);
  }

  public static List<Contract> getContracts(){
    String[] name = {"Tom","Jack","Mike","Tony"};
    List<Contract> list = new ArrayList<Contract>();
    list.add(new Contract(101,name[0],"11111111"));
    list.add(new Contract(102,name[0],"22222222"));
    list.add(new Contract(103,name[1],"33333333"));
    list.add(new Contract(104,name[1],"44444444"));
    list.add(new Contract(105,name[2],"55555555"));
    list.add(new Contract(106,name[2],"66666666"));
    list.add(new Contract(107,name[3],"77777777"));
    list.add(new Contract(108,name[3],"88888888"));
    return list;
  }
}