Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind Java HashMap size() Method?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___ java.util.HashMap;3Order
Put the learning moves in the order that makes the concept easiest to apply.
The size() method returns the number of entries in a map.
Definition and Usage
Java HashMap size() Method
❮ HashMap Methods
Example
import java.util.HashMap;
public class Main {
public static void main(String[] args) {
HashMap<String, String> capitalCities = new HashMap<String, String>();
capitalCities.put("England", "London");
capitalCities.put("Germany", "Berlin");
capitalCities.put("Norway", "Oslo");
capitalCities.put("USA", "Washington DC");
System.out.println(capitalCities.size());
}
}Definition and Usage
The size() method returns the number of entries in a map.
Syntax
public int size()Technical Details
| Returns: | The number of entries in the map. |
|---|