Print all key/value pairs in a Java ConcurrentHashMap

Question

I am trying to simply print all key/value pair(s) in a ConcurrentHashMap.

I found this code online that I thought would do it, but it seems to be getting information ab

Answer 1

I tested your code and works properly. I've added a small demo with another way to print all the data in the map:

ConcurrentHashMap map = new ConcurrentHashMap();
map.put("A", 1);
map.put("B", 2);
map.put("C", 3);

for (String key : map.keySet()) {
    System.out.println(key + " " + map.get(key));
}

for (Map.Entry entry : map.entrySet()) {
    String key = entry.getKey().toString();
    Integer value = entry.getValue();
    System.out.println("key, " + key + " value " + value);
}