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Extract values from HashMap in Java
To extract values from HashMap, let us first create a HashMap with keys and values −
HashMap<Integer, Integer>m = new HashMap<Integer, Integer>();
Now, add some elements to the HashMap −
m.put(10, 20); m.put(30, 40); m.put(50, 60); m.put(70, 80); m.put(90, 100); m.put(110, 120); m.put(130, 140); m.put(150, 160);
Now, extract the values from the HashMap −
for (Integer i: m.keySet()) { System.out.println(m.get(i)); }
Example
import java.util.HashMap; public class Demo { public static void main(String args[]) { HashMap<Integer, Integer>m = new HashMap<Integer, Integer>(); m.put(10, 20); m.put(30, 40); m.put(50, 60); m.put(70, 80); m.put(90, 100); m.put(110, 120); m.put(130, 140); m.put(150, 160); System.out.println("Displaying values from HashMap..."); for (Integer i: m.keySet()) { System.out.println(m.get(i)); } } }
Output
Displaying values from HashMap... 60 140 80 160 20 100 40 120
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