Iterating over and deleting from Hashtable in Java

Question

I have a Hashtable in Java and want to iterate over all the values in the table and delete a particular key-value pair while iterating.

How may this be done?

Answer 1

You can use a temporary deletion list:

List keyList = new ArrayList;

for(Map.Entry entry : hashTable){
  if(entry.getValue().equals("delete")) // replace with your own check
    keyList.add(entry.getKey());
}

for(String key : keyList){
  hashTable.remove(key);
}

You can find more information about Hashtable methods in the Java API