Java Streams task: sort a Map<String, Integer> by value using streams.

To sort a Map<String, Integer> by value using Java Streams, you can do the following:

import java.util.*;
import java.util.stream.*;

public class SortMapByValue {
    public static void main(String[] args) {
        Map<String, Integer> map = new HashMap<>();
        map.put("apple", 3);
        map.put("banana", 1);
        map.put("orange", 2);

        // Sort by value and collect into a LinkedHashMap to preserve order
        Map<String, Integer> sorted = map.entrySet()
            .stream()
            .sorted(Map.Entry.comparingByValue())
            .collect(Collectors.toMap(
                Map.Entry::getKey,
                Map.Entry::getValue,
                (e1, e2) -> e1,
                LinkedHashMap::new
            ));

        System.out.println(sorted); // {banana=1, orange=2, apple=3}
    }
}

Here, we create a stream from the entrySet, sort by value using Map.Entry.comparingByValue(), and then collect the result into a LinkedHashMap to preserve the order of elements.