map Create populated in Java 20

In Java 20, we create a hash using the HashMap class. Here is an example of creating a hash in Java:

import java.util.HashMap;
public class ExampleHashMap {

    public static void main(String[] args) {

        HashMap myHashMap = new HashMap<>();

        myHashMap.put("apple", 1);

        myHashMap.put("orange", 2);

        myHashMap.put("banana", 3);

        System.out.println(myHashMap);

    }

}

In this example, we create a new HashMap object called myHashMap. We add three key-value pairs to our hash using the put() method. Finally, we use println() to display the entire HashMap. When we run this program, the output will be:

{orange=2, banana=3, apple=1}

Note that the order of the key-value pairs might be different than the order in which they were added. This is because HashMap does not maintain the order of keys. We can access the value of a key using the get() method, like so:

int value = myHashMap.get("apple");
System.out.println(value);

This will output 1, the value corresponding to the key "apple".