Comparator 使用实例

public class CssComparator  implements Comparator<Object>{
    public int compare(Object o1, Object o2) {
        MapPdData p1=(MapPdData)o1;
        MapPdData p2=(MapPdData)o2; 
       /* if(p1.getChid()<p2.getChid()) //降序
         return 1;
        else
         return 0;*/
       
        if(p1.getChid()<p2.getChid())//升序
            return 0;
           else
            return 1;
    }

 }

等价于

public class CssComparator<T extends MapPdData> implements Comparator<T>{
    

         public int compare(T o1, T o2) {
        if(o1.getChid()< o2.getChid())//升序
            return 0;
           else
            return 1;
    }
}

代码调用
List<MapPdData> rList = new ArrayList<MapPdData>();
rList.add(……);
CssComparator comp = new CssComparator();
        Collections.sort(rList,comp);

for(MapPdData mpData:rList){

…… //完成

}