你有两种方法可以使用Arrays实用程序类
实现一个Comparator并将数组与比较器一起传递给sort方法，该方法将其作为第二个参数。
在对象所属的类中实现Comparable接口，并将数组传递给仅采用一个参数的sort方法。
例
class Book implements Comparable<Book> { public String name, id, author, publisher; public Book(String name, String id, String author, String publisher) { this.name = name; this.id = id; this.author = author; this.publisher = publisher; } public String toString() { return ("(" + name + ", " + id + ", " + author + ", " + publisher + ")"); } @Override public int compareTo(Book o) { // usually toString should not be used, // instead one of the attributes or more in a comparator chain return toString().compareTo(o.toString()); }}@Testpublic void sortBooks() { Book[] books = { new Book("foo", "1", "author1", "pub1"), new Book("bar", "2", "author2", "pub2") }; // 1. sort using Comparable Arrays.sort(books); System.out.println(Arrays.asList(books)); // 2. sort using comparator: sort by id Arrays.sort(books, new Comparator<Book>() { @Override public int compare(Book o1, Book o2) { return o1.id.compareTo(o2.id); } }); System.out.println(Arrays.asList(books));}输出量
[(bar, 2, author2, pub2), (foo, 1, author1, pub1)][(foo, 1, author1, pub1), (bar, 2, author2, pub2)]
