对list里面的对象进行排序

一个通用的类..

public class Compare implements Comparator {

?public int compare(Object o1, Object o2) {
??Person p1=(Person) o1;
??Person p2=(Person) o2;
??if(p1.getAge()>p2.getAge()){
???return 1;
??}else{
??if(p1.getAge()==p2.getAge()){
???return 0;
??}else{
???return -1;
??}
??}
?}

}