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Get the value associated with a given key in Java HashMap
Use the get() method to get the value associated with a given key.
Here is our HashMap and its elements −
// Create a hash map
HashMap hm = new HashMap();
// Put elements to the map
hm.put("Bag", new Integer(1100));
hm.put("Sunglasses", new Integer(2000));
hm.put("Frames", new Integer(800));
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));To get the associated value. the key is set as a parameter like this −
hm.get("Frames")Above, the key is Frames and we are fetching the value associated with it.
The following is an example to get the value associated with a given key in Java HashMap −
Example
import java.util.*;
public class Demo {
public static void main(String args[]) {
// Create a hash map
HashMap hm = new HashMap();
// Put elements to the map
hm.put("Bag", new Integer(1100));
hm.put("Sunglasses", new Integer(2000));
hm.put("Frames", new Integer(800));
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
// Get a set of the entries
Set set = hm.entrySet();
System.out.println("Elements in HashMap...");
// Get an iterator
Iterator i = set.iterator();
// Display elements
while(i.hasNext()) {
Map.Entry me = (Map.Entry)i.next();
System.out.print(me.getKey() + ": ");
System.out.println(me.getValue());
}
System.out.println();
System.out.println("The value for key Frames in the HashMap = "+hm.get("Frames"));
}
}Output
Elements in HashMap... Frames: 800 Belt: 600 Wallet: 700 Bag: 1100 Sunglasses: 2000 The value for key Frames in the HashMap = 800
Updated on: 30-Jul-2019
1K+ Views
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