我使用Spring和Hibernate以及所有Java 8的东西导入了一个Intellij中的程序,并且我遇到了Java 8没有看到的问题。 JDK已设置并且导入正常;我真的不明白为什么我的IDE强调这个代码是红色的。该代码是:无法识别java 8 lambda,但配置正常
@Entity
@Table(name = "author")
public class Author extends BaseEntity<Long> {
@Column(name = "name")
private String name;
@OneToMany(mappedBy = "author", fetch = FetchType.EAGER)
private List<Book> bookList;
public Author() {
}
public Author(String name, List<Book> bookList) {
this.name = name;
this.bookList = bookList;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Book> getBookList() {
return bookList;
}
public void setBookList(List<Book> bookList) {
this.bookList = bookList;
}
public Set<Book> getBooks() { // !!!!! here lines 1
return Collections.unmodifiableSet(// 2
this.bookList.stream(). // 3
collect(Collectors.toSet()));//4 are red
}
而且还import
声明:
import java.util.stream.Collectors;
是红色的为好。当我点击错误它说:
Incompatible types.Required set <packet.model.book>
Found set <java.lang.Object>
什么可能是在第一方的问题?