java dictionary initialization

A dictionary, also known as a map or associative array, is a collection of key-value pairs. In Java, you can use the java.util.HashMap class to implement a dictionary.

Here's an example of how to initialize a dictionary in Java:

import java.util.HashMap;

// Initialize an empty dictionary
HashMap<String, Integer> dictionary = new HashMap<>();

// Add key-value pairs to the dictionary
dictionary.put("apple", 1);
dictionary.put("banana", 2);
dictionary.put("orange", 3);

This creates a dictionary with three key-value pairs: "apple" -> 1, "banana" -> 2, and "orange" -> 3.

You can also initialize a dictionary with a set of key-value pairs using the putAll() method:

import java.util.HashMap;

// Initialize a dictionary with a set of key-value pairs
HashMap<String, Integer> dictionary = new HashMap<>();
dictionary.putAll(Map.ofEntries(
    Map.entry("apple", 1),
    Map.entry("banana", 2),
    Map.entry("orange", 3)
));

This creates a dictionary with the same key-value pairs as in the previous example.

You can also use the java.util.Map interface and the java.util.AbstractMap class to create a dictionary in Java.