import java.util.*;
public class testSet {
public static void main(String[] args) {
List<Message> received = List.of(new Message(1, "Hello!"), new Message(2, "发工资了吗?"), new Message(2, "发工资了吗?"),
new Message(3, "去哪吃饭?"), new Message(3, "去哪吃饭?"), new Message(4, "Bye"));
List<Message> displayMessages = process(received);
for (Message message : displayMessages) {
System.out.println(message.text);
}
}
static List<Message> process(List<Message> received) {
// TODO: 按sequence去除重复消息
Set<Message> set = new TreeSet<>();
for (Message rec : received) {
set.add(rec);
}
List<Message> list = new ArrayList<>();
for (Message message : set) {
list.add(message);
}
return list;
}
}
class Message implements Comparable<Message> {
public final int sequence;
public final String text;
public Message(int sequence, String text) {
this.sequence = sequence;
this.text = text;
}
@Override
public int compareTo(Message message) {
// TODO Auto-generated method stub
return Integer.compare(this.sequence, message.sequence);
}
}
大黑与small白