拉勾大厂直通私教班
public Book build() {
Book book = new Book();
book.head = this.head;
book.preface = this.preface;
book.thanks = this.thanks;
book.content = this.content;
return book;
}
}
public static void main(String[] args) {
Book book = BookBuilder.aBook().withPreface("preface")
.withHead("Head")
.withContent("content")
.build();
}
