HashMap的奇怪问题

Question

public static HashMap parse(InputStream in) throws Exception {
HashMap propertyMap = new HashMap();
SAXReader reader = new SAXReader();
Document document = reader.read(in);
Element root = document.getRootElement();
Iterator i = root.elementIterator("windowId");
while(i.hasNext()) {
Element windowElement = (Element) i.next();
Attribute attribute = windowElement.attribute("name");
String windowId = attribute.getStringValue();
List propertyList = new ArrayList();
for (Iterator j = windowElement.elementIterator( "property" );j.hasNext();){
Element propertyElement = (Element) j.next();
propertyList.add(propertyElement.getStringValue());
}
System.out.println(windowId);
for(int k=0;k<propertyList.size();k++){
System.out.println(propertyList.get(k));
}
propertyMap.put(windowId,propertyList);
}
return propertyMap;
}从配置文件中读取每个windowId的property属性值，将windowId作为key，
该windowId的property组成的list为value，存进HashMap中，
从console输出的信息看，读取文件不存在任何问题，且每个windowId均不相同，为何存放了10次，而最后HashMap中只有8个呢？

Answer 1

没有相同值
而且我每次存放之前都是用的List propertyList = new ArrayList();
即使list里面的值完全相同，也不应该覆盖吧。

Answer 2

好像HashMap不允许有相同的key。

Answer 3

============Gen0010XXXXX=============
materialName
averageSize
quantity
packagedForm
expectedDate
============Gen0020XXXXX=============
supplierDeliveryDate
orderNo
materialName
averageSize
orderAmount
unit
unitCost
amount
resultMessage
============Gen0030XXXXX=============
arrivalQuantity
erLotNo
division
loss
orderNo
materialName
averageSize
orderAmount
unit
unitCost
amount
resultMessage
============Gen0040XXXXX=============
checkIsPassed
arrivalDate
makerLotNo
resultMessage
issueQuantity
materialName
averageSize
arrivalQuantity
unit
============Gen0050XXXXX=============
factoryLotNo
============Gen0060XXXXX=============
materialName
averageSize
usedQuantity
============Gen0070XXXXX=============
orderNo
orderDate
quantity
paymentDate
============Gen0080XXXXX=============
stubNo
materialName
averageSize
remainer
============Gen0090XXXXX=============
factoryLotNo
bottleNo
materialName
averageSize
arrivalDate
quantity
resultMessage
============Gen0100XXXXX=============
makerLotNo
materialName
averageSize以上是运行时输出的东西，debug发现在put时会覆盖掉2个，但不管是key还是value都完全不相同，晕死了

Answer 4

存放第10个时会覆盖掉第8个，每次debug都这样

Answer 5

那你用Hashtable测试下
相对于HashMap Hashtable是线程安全的

Answer 6

你打印的值分不清哪个是windowID,每次输出windowID看看，应该是这个有重复，或者都是null值，否则不可能覆盖的。

Answer 7

靠，看清楚楼主的话再回答阿System.out.println(windowId);
for(int k=0;k<propertyList.size();k++){
System.out.println(propertyList.get(k));
}
-------------------------------------------
============Gen0010XXXXX=============
materialName
averageSize
quantity
packagedForm
expectedDate
============Gen0020XXXXX=============
supplierDeliveryDate
orderNo
materialName
averageSize
orderAmount
unit
unitCost
amount
resultMessage
============Gen0030XXXXX=============
arrivalQuantity
erLotNo
division
loss
orderNo
materialName
averageSize
orderAmount
unit
unitCost
amount
resultMessage
============Gen0040XXXXX=============
checkIsPassed
arrivalDate
makerLotNo
resultMessage
issueQuantity
materialName
averageSize
arrivalQuantity
unit
============Gen0050XXXXX=============
factoryLotNo
============Gen0060XXXXX=============
materialName
averageSize
usedQuantity
============Gen0070XXXXX=============
orderNo
orderDate
quantity
paymentDate
============Gen0080XXXXX=============
stubNo
materialName
averageSize
remainer
============Gen0090XXXXX=============
factoryLotNo
bottleNo
materialName
averageSize
arrivalDate
quantity
resultMessage
============Gen0100XXXXX=============
makerLotNo
materialName
averageSize
以上说明这些key阿 value都是没有问题的
但是做propertyMap.put(windowId,propertyList);时丢失了