Java Collection, HashMap Exercises: Create a set view of the mappings contained in a map
Java Collection, HashMap Exercises: Exercise-9 with Solution
Write a Java program to create a set view of the mappings contained in a map.
Sample Solution:-
Java Code:
import java.util.*;
public class Example9 {
public static void main(String args[]) {
HashMap < Integer, String > hash_map = new HashMap < Integer, String > ();
hash_map.put(1, "Red");
hash_map.put(2, "Green");
hash_map.put(3, "Black");
hash_map.put(4, "White");
hash_map.put(5, "Blue");
// create set view for the map
Set set = hash_map.entrySet();
// check set values
System.out.println("Set values: " + set);
}
}
Sample Output:
Set values: [1=Red, 2=Green, 3=Black, 4=White, 5=Blue]
Java Code Editor:
Contribute your code and comments through Disqus.
Previous: Test if a map contains a mapping for the specified value.
Next: Get the value of a specified key in a map.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework