JAVA HashMap get keys by values

    Map<String, String> map = new HashMap<String, String>();
    
    map.put("abc", "123");
    map.put("xyz", "456");
    
    for(Entry<String, String> entry : map.entrySet()) {
        if(entry.getValue().equalsIgnoreCase("456")) {
            System.out.println(entry.getKey());
        }
    }

Source: stackoverflow.com

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