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  1. import java.util.*;
  2.  
  3. public class HashMapDemo {
  4.  
  5.    public static void main(String args[]) {
  6.       // Create a hash map
  7.       HashMap hm = new HashMap();
  8.       // Put elements to the map
  9.       hm.put("Zara", new Double(3434.34));
  10.       hm.put("Mahnaz", new Double(123.22));
  11.       hm.put("Ayan", new Double(1378.00));
  12.       hm.put("Daisy", new Double(99.22));
  13.       hm.put("Qadir", new Double(-19.08));
  14.  
  15.       // Get a set of the entries
  16.       Set set = hm.entrySet();
  17.       // Get an iterator
  18.       Iterator i = set.iterator();
  19.       // Display elements
  20.       while(i.hasNext()) {
  21.          Map.Entry me = (Map.Entry)i.next();
  22.          System.out.print(me.getKey() + ": ");
  23.          System.out.println(me.getValue());
  24.       }
  25.       System.out.println();
  26.       // Deposit 1000 into Zara's account
  27.       double balance = ((Double)hm.get("Zara")).doubleValue();
  28.       hm.put("Zara", new Double(balance + 1000));
  29.       System.out.println("Zara's new balance: " +
  30.       hm.get("Zara"));
  31.    }
  32. }
Compilation error #stdin compilation error #stdout 0s 0KB
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Standard input is empty
compilation info 
Main.java:3: error: class HashMapDemo is public, should be declared in a file named HashMapDemo.java
public class HashMapDemo {
       ^
Note: Main.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
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Standard output is empty
https://ideone.com/tgfMdv
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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