java list去除对象类的重复值

List<user> list=new ArrayList<user>();

List<user> listtemp=new ArrayList<user>();

list.add(new user("1"));

list.add(new user("1"));

list.add(new user("2"));

System.out.println("去除重复前:");

for(int i=0;i<list.size();i++)

{

System.out.println(list.get(i).getUsername());

}

Set<String> set = new HashSet<String>();

for (user beansList : list) {

if (set.add(beansList.getUsername())) {

listtemp.add(beansList);

}

}

list.clear();

list.addAll(listtemp);

System.out.println("去除重复后:");

for(int i=0;i<list.size();i++)

{

System.out.println(list.get(i).getUsername());

}