我正在开发这个时间容器,它基本上包含一个名为 week 的类的实例,它由 2 个日历实例(开始和结束)和许多其他管理信息(现在不相关)组成
问题是我在while循环中创建了这些Week实例,并且我看到在创建week实例期间(在while循环中打印日历毫秒),millis很好,但是如果我检查列表的内容几个星期,他们不是!Calendar 的所有实例(开始和结束)在所有周中都包含相同的值。
我写了一些代码让你们清楚地理解问题,有类(Container和BiggerContainer):
public class Container
{
private static final long serialVersionUID = 1L;
private Calendar start;
private Calendar end;
public Container(Calendar start, Calendar end)
{
this.start = start;
this.end = end;
}
public Calendar getStart()
{
return start;
}
public Calendar getEnd()
{
return end;
}
}
Bigger container:
public class BiggerContainer
{
private static final long serialVersionUID = 1L;
private ArrayList<Container> containerList = new ArrayList<Container>();
public void init()
{
int i = 0;
long max = 604800000;
long nu = Calendar.getInstance().getTimeInMillis();
Calendar startC = Calendar.getInstance();
Calendar endC = Calendar.getInstance();
while (i <= 5)
{
startC.setTimeInMillis(nu);
endC.setTimeInMillis(nu + max);
System.out.println("At creation time: " + startC.getTimeInMillis() + " / " + endC.getTimeInMillis());
containerList.add(new Container(startC, endC));
nu += max;
i++;
}
}
public void show()
{
for (Container c : containerList)
{
System.out.println("Start millis: " + c.getStart().getTimeInMillis() + " end millis "
+ c.getEnd().getTimeInMillis());
}
}
/**
* TEST
*
* @param args
*/
public static void main(String[] args)
{
BiggerContainer bc = new BiggerContainer();
bc.init();
bc.show();
}
}
输出:
At creation time: 1336480993036 / 1337085793036
At creation time: 1337085793036 / 1337690593036
At creation time: 1337690593036 / 1338295393036
At creation time: 1338295393036 / 1338900193036
At creation time: 1338900193036 / 1339504993036
At creation time: 1339504993036 / 1340109793036
Start millis: 1339504993036 end millis 1340109793036
Start millis: 1339504993036 end millis 1340109793036
Start millis: 1339504993036 end millis 1340109793036
Start millis: 1339504993036 end millis 1340109793036
Start millis: 1339504993036 end millis 1340109793036
Start millis: 1339504993036 end millis 1340109793036
正如您在 init() 方法中创建 Container 实例期间看到的那样,Calendar 实例提供了正确数量的毫秒,而在 show 方法中,它们打印所有相同的毫秒...
你有什么主意吗?我的印象是这是一个非常新的错误,但我无法弄清楚我做错了什么