Program to convert a Map to a Stream in Java

At first, create a Map and set values −

Map<Integer, String> map = new HashMap<>(); map.put(1, "Kevin"); map.put(2, "Ryan"); map.put(3, "Nathan"); map.put(4, "Ricky"); map.put(5, "Shane"); map.put(6, "Adam");

Now, convert the Map to Stream −

Stream<Map.Entry<Integer, String> > stream = map.entrySet().stream(); System.out.println("Stream (Map to Stream) = "+ Arrays.toString(stream.toArray()));

Example

Following is the program to convert a Map to a Stream in Java −

import java.util.*; import java.util.stream.*; public class Demo {    public static void main(String args[]) {       Map<Integer, String> map = new HashMap<>();       map.put(1, "Kevin");       map.put(2, "Ryan");       map.put(3, "Nathan");       map.put(4, "Ricky");       map.put(5, "Shane");       map.put(6, "Adam");       System.out.println("Map = " + map);       Stream<Map.Entry<Integer, String> > stream = map.entrySet().stream();       System.out.println("Stream (Map to Stream) = "+ Arrays.toString(stream.toArray()));    } }

Output

Map = {1=Kevin, 2=Ryan, 3=Nathan, 4=Ricky, 5=Shane, 6=Adam} Stream (Map to Stream) = [1=Kevin, 2=Ryan, 3=Nathan, 4=Ricky, 5=Shane, 6=Adam]