You can use the Gson library to convert a JSON string to a Map in Java.
You can use the toArray() method of the ArrayList class to convert an ArrayList of strings to a string array. Here's an example:
To convert a List to a Set in Java, you can use the new HashSet<>(list) constructor to create a new HashSet and initialize it with the elements of the List.
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.
A Set is a collection of elements in which each element can only occur once. A Set does not have a specific order and does not provide a way to access its elements by their position.
You can use the toArray() method of the List interface to convert a List<Integer> to an int in Java.
To initialize a static Map in Java, you can use the Map interface's of method, which was added in Java 9. The of method creates an immutable Map with a fixed set of key-value pairs.
To sort a List alphabetically in Java, you can use the Collections.sort method and pass in your List as an argument.
You can use the flatMap method from the Stream API to turn a List<List<T>> (a list of lists) into a List<T> in Java 8. Here's an example of how you can do this:
You can use the entrySet() method of the Map interface to get a Set view of the mappings contained in the map, and then create a List from this set using the new