java中的List排序

qbq

//java list 排序
//关键词： java    list    排序                                          
//主要用到: Collections.sort方法:
package com.tom.compare;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class CompareClient {
/**
  * @param args
  */
public static void main(String[] args) {
  // TODO Auto-generated method stub
  List list = new ArrayList();
  list.add(new Content(15000,"1asdfasd5000"));
  list.add(new Content(10000,"10000"));
  list.add(new Content(20000,"20000"));
  list.add(new Content(30000,"30000"));
  list.add(new Content(25000,"25000"));
  list.add(new Content(13000,"13000"));
  list.add(new Content(15000,"15000"));  
  list.add(new Content(89000,"89000"));
  
  ContentComparator comp = new ContentComparator();  
  Collections.sort(list,comp);
  
  Content content;
  for(int i = 0; i  c2.getKey()) {
   return 1;
  } else {
   if (c1.getKey() == c2.getKey()) {
    return 0;
   } else {
    return -1;
   }
  }
}
}
package com.tom.compare;
public class Content {
private long key;
private String name;
public Content(long key, String name) {
  this.key = key;
  this.name = name;
}
public long getKey() {
  return key;
}
public void setKey(long key) {
  this.key = key;
}
public String getName() {
  return name;
}
public void setName(String name) {
  this.name = name;
}
}
结果是:
content.getName() 10000
content.getName() 13000
content.getName() 1asdfasd5000
content.getName() 15000
content.getName() 20000
content.getName() 25000
content.getName() 30000
content.getName() 89000


另例：
ListSort.java
package test.map;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
public class ListSort {
     @SuppressWarnings("unchecked")
public static void main(String[] args){
         ArrayList list = new ArrayList();
         list.add(new Person("lcl",28));
         list.add(new Person("fx",23));
         list.add(new Person("wqx",29));
         Comparator comp = new Comparator(){
        public int compare(Object o1,Object o2) {
              Person p1=(Person)o1;
              Person p2=(Person)o2;
             if(p1.age


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u1/55983/showart_1096593.html