key:3-keykey:/v1.02-keyException in thread "main" java.util.ConcurrentModificationException	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)	at java.util.HashMap$EntryIterator.next(HashMap.java:1463)	at java.util.HashMap$EntryIterator.next(HashMap.java:1461)

 

public static void main(String[] args) {        final String StartFlag = "/v1.0";        Map
     
       source = new HashMap<>();        source.put("1-key", "1-value");        source.put(StartFlag + "2-key", "2-value");        source.put("3-key", "3-value");        Iterator
      
       
        > iterator = source.entrySet().iterator();        while (iterator.hasNext()) {            Map.Entry
        
          next = iterator.next();            String key = next.getKey();            System.out.println("key:" + key);            String value = next.getValue();            if (key.startsWith(StartFlag)) {                key = key.substring(StartFlag.length());                iterator.remove();                source.put(key, value);            }        }        System.out.println(source);    }
        
       
      
     

 

URL resource = getClass().getResource("/swagger/project.json");        System.out.println("URL:" + resource.toString());        URI uri = resource.toURI();        System.out.println("uri:" + uri);        Path path = Paths.get(uri);        File file = path.toFile();        System.out.println("exists:" + file.exists());