标签：style blog color os io java ar for div
第一种方法，就是list中对象实现Comparable接口，代码如下：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | public class Person implements Comparable<Person> { private String name; private Integer order; /** * @return the name */ public String getName() { return name; } /** * @param name * the name to set */ public void setName(String name) { this.name = name; } /** * @return the order */ public Integer getOrder() { return order; } /** * @param order * the order to set */ public void setOrder(Integer order) { this.order = order; } @Override public int compareTo(Person arg0) { return this.getOrder().compareTo(arg0.getOrder()); }} |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | public static void main(String[] args) { List<Person> listA = new ArrayList<Person>(); Person p1 = new Person(); Person p2 = new Person(); Person p3 = new Person(); p1.setName("name1"); p1.setOrder(1); p2.setName("name2"); p2.setOrder(2); p3.setName("name3"); p3.setOrder(3); listA.add(p2); listA.add(p1); listA.add(p3); Collections.sort(listA); for (Person p : listA) { System.out.println(p.getName()); }} |
第二种方法，就是在重载Collections.sort方法，代码如下：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | public class Person { private String name; private Integer order; /** * @return the name */ public String getName() { return name; } /** * @param name * the name to set */ public void setName(String name) { this.name = name; } /** * @return the order */ public Integer getOrder() { return order; } /** * @param order * the order to set */ public void setOrder(Integer order) { this.order = order; }} |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | public static void main(String[] args) { List<Person> listA = new ArrayList<Person>(); Person p1 = new Person(); Person p2 = new Person(); Person p3 = new Person(); p1.setName("name1"); p1.setOrder(1); p2.setName("name2"); p2.setOrder(2); p3.setName("name3"); p3.setOrder(3); listA.add(p2); listA.add(p1); listA.add(p3); Collections.sort(listA, new Comparator<Person>() { public int compare(Person arg0, Person arg1) { return arg0.getOrder().compareTo(arg1.getOrder()); } }); for (Person p : listA) { System.out.println(p.getName()); } } |
两次执行的结果都是：
name1
name2
name3
标签：style blog color os io java ar for div
原文地址：http://www.cnblogs.com/wych/p/3946485.html
