hashmap

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Generic HashMap

I have one method, check which has two hashmaps as parameters. Keys of these maps is a String and value is String or Arraylist.[详细]

2023-04-04 16:21 分类：问答
Implementation of containsKey HashMap<> - Java

The whole purpose of using containsKey() is to check whether any given key is already in HashMap or not? If it doesn\'t contain that key than just add key into that HasMap.[详细]

2023-04-04 15:51 分类：问答
java Get hashmap keys as integer array

I have a hashmap like this public HashMap <String,People> valueHashMap= new Hashmap(); Here the key to my HashMap i开发者_运维知识库s time in seconds as string, ie I am adding value to hashma[详细]

2023-04-04 13:42 分类：问答
Constraint Specific Key - convention for HashMap - Java

Simple question, yet I couldn\'t figure out the answer, Is it possible to constraint key convention for my application\'s HashMap? As I don\'t want future developer who works on it and try to use dif[详细]

2023-04-04 12:31 分类：问答
Java:HashMap<String,String> storing same value as key and value.?

I am getting this strange output in HashMap. I have two ArrayList<String> one containing the key and another containing value.[详细]

2023-04-04 01:24 分类：问答
Does Java return by reference or by value

I have a HashMap: private HashMap<Str开发者_C百科ing, Integer> cardNumberAndCode_ = new HashMap<String, Integer>();[详细]

2023-04-02 12:34 分类：问答
How to avoid inserting duplicate values in a HashMap?

Let say we have : Map hm = new HashMap(); 开发者_如何学C How to avoid putting duplicate values(Emplyees) in this HashMap?I assume you are coding in Java, so:[详细]

2023-04-02 05:58 分类：问答
hashmap custom class key && object saving/loading

Been working on a project for a while now and I\'ve come across a few different complications and solutions that don\'t seem to pan out together.[详细]

2023-04-02 03:49 分类：问答
Sort Hashmap keys by numerical value descending order

How can I sort HashMap keys by their numerical value? Currently, in the natural ordering it l开发者_运维技巧ooks like this:[详细]

2023-04-01 13:26 分类：问答
Using a concurrent hashmap to reduce memory usage with threadpool?

I\'m working with a program that runs lengthy SQL queries and stores the processed results in a HashMap. Currently, to get around the slow execution time of each of the 20-200 queries, I am using a fi[详细]

2023-04-01 11:03 分类：问答