hashmap

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Data Structure to use instead of hash_map

I want to make an array containing three 开发者_Go百科wide character arrays such that one of them is the key.[详细]

2023-03-19 14:29 分类：问答
Performance for HashMap when Key is Guaranteed Unique

If the keys I wish to use are guaranteed to be unique (or at least the assumption can be made that the keys are unique), does using a \'vanilla\' ConcurrentHashMap provide the best performance, or doe[详细]

2023-03-19 11:31 分类：问答
An Hashmap with a finite set of keys that each accept only one type of value?

Ok, this might be a little hard to explain. I\'m looking for a way to build a Hashmap of some sort, which will be populated with keys that I already know (because they are properties of the object I a[详细]

2023-03-19 10:47 分类：问答
Only iterate over a part of a Map

I have data stored in a HashMap, which I want to access via multiple threads simultaneously, to split the work done on the items.[详细]

2023-03-19 10:30 分类：问答
how to cast object to double type array in java?

OK 开发者_StackOverflow中文版so what if i have a method like: Object[] myTest(int[] a, double[] b){[详细]

2023-03-19 06:55 分类：问答
Java HashMap with ArrayList wildcards

I have a HashMap where the values are ArrayLists, and I\'m trying to write a function to accept generic instances of these HashMaps[详细]

2023-03-18 07:36 分类：问答
Unable to get values from a hashmap which uses a arraylist as value is cleared

I am working on a piece of code which has a Hashmap. This hashmap has a string as key and an arraylist as value. I populate the arraylist and then put the value into the hashmap. After putting the val[详细]

2023-03-18 07:05 分类：问答
HashMap is broken/ performance issues

Currently I have Has开发者_如何转开发hMap implemented which private static Map<String, Item> cached = new HashMap<String, Item>();[详细]

2023-03-18 05:32 分类：问答
Sorting a HashMap with 2 fields

I have a hashmap with 8 fields. Among those 2 are id and idseq. Both are integer. There can be more than one similar idseq, but no开发者_如何转开发t for one id. Can this hasp map be sorted on the basi[详细]

2023-03-18 04:14 分类：问答
Getting data from JSON

I\'m trying to get the values out of this JSON string but I\'m having a hard time achieving this. {\"DebugLogId\":\"1750550\",\"RequestId\":\"17505503\",\"Result\":[详细]

2023-03-18 04:10 分类：问答