关于对象与内存的猜想

Map<String, Object> map = null;

List<BaseBean> beanlist = new ArrayList<BaseBean>();

for(int i=0;i<list.size();i++){
map = list.get(i);
basebean = new BaseBean();
basebean.setOrder_seq(map.get("ZBORDERID")+"");
basebean.setSequen((map.get("TEAMORDERID")+""));
basebean.setPassName((map.get("PASSNAME")+""));
basebean.setCardNO((map.get("DOCNUMBER")+""));
beanlist.add(basebean);
}

arraylist.add(basebean) 增加的是basebean对象的内存地址，如果for循环中，每次不重新产生新对象【basebean = new BaseBean();】，那么每次添加的都是同一个basebean对象，arraylist会以最后一次的内存地址为准！结果如下：

BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]
BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]
BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]
BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]
BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]
BaseBean [sequen=325690, order_seq=392240, passName=ODS/Thor, cardNO=G666666]

关于对象与内存的猜想

原文：http://www.cnblogs.com/flord/p/5718903.html