public static void main (String [] args){		ArrayList 
     
       list = new ArrayList
      
       ();//创建集合,并加入对象		list.add(new Apple("001",22,30));		list.add(new Apple("002",22,40));		list.add(new Apple("003",2,3));		list.add(new Apple("004",10,10));		Collections.sort(list,new Comparator
       
        (){ //重写sort里的方法			@Override			public int compare(Apple o1, Apple o2) {				if(o1.zhong-o2.zhong>0){					return 1;				}else if (o1.zhong-o2.zhong==0){					if(o1.tiji-o2.tiji>=0){						return 1;					}else{						return -1;					}				}else{					return -1;				}			}		});	 	for(Apple app:list){	 		System.out.println(app);	 	}	    Collections.sort(list,new Comparator
        
         (){
        
       
      
     

//重写sort里的方法

@Override public int compare(Apple o1, Apple o2) { if(o2.zhong-o1.zhong>0){ return 1; }else if (o2.zhong-o1.zhong==0){ if(o2.tiji-o1.tiji>=0){ return 1; }else{ return -1; } }else{ return -1; } } }); System.out.println("----------------------------------------------------"); for(Apple app:list){ System.out.println(app); } } }