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  1. import java.util.concurrent.ConcurrentHashMap;
  2. import java.util.Iterator;
  3.  
  4.  
  5. public class ConcurrentHashMapExample
  6. {
  7.  
  8.  
  9.     public static void main(String[] args)
  10.     {
  11.         ConcurrentHashMap<String,String> premiumPhone = new ConcurrentHashMap<String,String>();
  12.         premiumPhone.put("Apple", "iPhone6");
  13.         premiumPhone.put("HTC", "HTC one");
  14.         premiumPhone.put("Samsung","S6");
  15.  
  16.         Iterator iterator = premiumPhone.keySet().iterator();
  17.  
  18.         while (iterator.hasNext())
  19.         {
  20.             System.out.println(premiumPhone.get(iterator.next()));
  21.             premiumPhone.put("Sony", "Xperia Z");
  22.         }
  23.  
  24.     }
  25.  
  26. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:5: error: class ConcurrentHashMapExample is public, should be declared in a file named ConcurrentHashMapExample.java
public class ConcurrentHashMapExample
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/4rkbuG
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

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