java list 对象 值 排序

/**
* 排序算法
*/
public static List<RfidBean> getNewsList(List<RfidBean> oldRfidbean){
Collections.sort(oldRfidbean, new Comparator<RfidBean>() {
public int compare(RfidBean arg0, RfidBean arg1) {
long hits0 = arg0.getSortbyGateway();
long hits1 = arg1.getSortbyGateway();
if (hits1 > hits0) {
return 1;
}else {
return -1;
}
}
});
return oldRfidbean;
}

public static void main(String[] args) {
List<RfidBean> l=new ArrayList<RfidBean>();
RfidBean r1=new RfidBean();
RfidBean r2=new RfidBean();
RfidBean r3=new RfidBean();
RfidBean r4=new RfidBean();

r1.setSortbyGateway(-1l);
r2.setSortbyGateway(9l);
r3.setSortbyGateway(2l);
r4.setSortbyGateway(5l);

l.add(r1);
l.add(r2);
l.add(r3);
l.add(r4);

for (RfidBean rfidBean : l) {
System.out.println(rfidBean.getSortbyGateway());
}

InoutProcessoryhgj.getNewsList(l);
for (RfidBean rfidBean : l) {
System.out.println(rfidBean.getSortbyGateway());
}

}