java 打印哈希表的内容
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时间：2020-10-31 22:12:32 来源:igfitidea点击:
Printing contents of a hashtable
提问by d199224
I'm having some trouble printing the contents of a hashtable, it seems to just be printing the reference out.
我在打印哈希表的内容时遇到了一些麻烦，它似乎只是将引用打印出来。
add to hashtable code:
添加到哈希表代码：
protected Hashtable items = new Hashtable();
public void addItem(String itemId, String category, String title, String imageurl, double price, int quantity) {
//boolean test = false;
String price1 = String.valueOf(price);
String[] item = {itemId, imageurl, title, category, price1, Integer.toString(quantity)};
if (items.containsKey(itemId)) {
String[] tmpItem = (String[])items.get(itemId);
int tmpQuant = Integer.parseInt(tmpItem[5]);
quantity += tmpQuant;
tmpItem[5] = Integer.toString(quantity);
}
else {
items.put(itemId, item);
}
}
view contents code:
查看内容代码：
public void getContents()
{
Enumeration e = items.elements();
while (e.hasMoreElements())
{
System.out.println(e.nextElement());
}
}
results:
结果：
[Ljava.lang.String;@3736e10e
[Ljava.lang.String;@73f17a73
[Ljava.lang.String;@729e4f7c
Anyone got any ideas?
有人有任何想法吗？
Thanks
谢谢
回答by rgettman
You've printed the array objects themselves, not the contents of the arrays. Try Arrays.toString
您已经打印了数组对象本身，而不是数组的内容。尝试Arrays.toString
System.out.println(Arrays.toString((String[]) e.nextElement()));
