Snippets
hashmap

How-to articles, tricks, and solutions about HASHMAP

C# Java HashMap equivalent

In Java, the HashMap class is the equivalent of the Dictionary class in C#. It is a map data structure that stores (key, value) pairs and provides fast lookup and insertion of elements.

java hashmap c#

get string value from HashMap depending on key name

To get the string value from a HashMap depending on the key name in Java, you can use the get() method of the Map interface.

java collections hashmap

HashMap - getting First Key value

To get the first key-value pair from a HashMap in Java, you can use the entrySet() method to get a set of the map's entries and then use the iterator() method to get an iterator for the set.

java hashmap

How can I sort Map values by key in Java?

To sort the values of a Map by key in Java, you can use the TreeMap class, which is a Map implementation that maintains its entries in ascending key order.

java dictionary hashmap

How to convert List to Map?

To convert a List to a Map in Java, you can use the stream() method and the collect() method along with a Collectors.toMap() call. Here's an example of how to do this:

java list hashmap data-conversion data-structures

How to get values and keys from HashMap?

To get the values and keys from a HashMap in Java, you can use the values and keySet methods.

java hashmap

How to sort a HashMap in Java

To sort a HashMap in Java, you can use the TreeMap class, which is a Map implementation that maintains its entries in ascending order, sorted according to the keys.

java hashmap sorting

How to update a value, given a key in a hashmap?

To update the value associated with a key in a HashMap in Java, you can use the put() method.

java key hashmap

Is there Java HashMap equivalent in PHP?

In PHP, the equivalent to a Java HashMap would be an associative array.

php hashmap

Iterate through a HashMap

There are several ways to iterate through a HashMap in Java: Using the for-each loop

java iteration loops hashmap

1 2 > >>