map Size in Java 20

To get the size of a hash in Java 20, you can use the size() method. This method returns an integer value representing the number of key-value pairs in the hash.

Here is an example code snippet:

// Create a new HashMap
HashMap hashMap = new HashMap<>();
// Add some key-value pairs to the hash

hashMap.put("John", 25);

hashMap.put("Jane", 30);

hashMap.put("Bob", 20);
// Get the size of the hash using the size() method

int size = hashMap.size();
// Print out the size of the hash

System.out.println("The size of the hash is: " + size);

In this example, we created a HashMap and added some key-value pairs to it. Then, we used the size() method to get the size of the hash and stored the result in the size variable. Finally, we printed out the size of the hash using the System.out.println() method. The output should be:

The size of the hash is: 3

Overall, using the size() method is a simple and efficient way to get the size of a hash in Java 20.