我有这个对象：
public class MatchEvent implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private Instant dateReceived;
public Instant getDateReceived() {
return dateReceived;
}
public void setDateReceived(Instant dateReceived) {
this.dateReceived = dateReceived;
}
}
我想按收到日期订购；
matchService
.findAllByDay(today)
.sorted(Comparator.comparing(MatchEvent::dateReceived))
但这似乎是不可能的，因为我遇到了编译错误：
Multiple markers at this line
- The method comparing(Function<? super T,? extends U>) in the type Comparator is not applicable for the arguments
(MatchEvent::dateReceived)
- The type MatchEvent does not define dateReceived(T) that is applicable here
声明一个名为的公共方法getDateReceived() inside class MatchEvent如下：
public Instant getDateReceived(){
return dateReceived;
}
然后您可以使用该方法作为方法参考，如下所示：
Comparator.comparing(MatchEvent::getDateReceived)
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