How to get all the entries from a LinkedHashMap in Java?

Question

I am using String object as the key to a linkedhashmap.

How can I get all the entries in the LinkedHashMap?

Answer 1

You have three options that depend on whether you need just keys, just values or both

Set<String> keys = yourMap.keySet();
Collection<YourValueClass> values = yourMap.values();
Set<Map.Entry<String,YourValueClass>> pairs = yourMap.entrySet();

then you can easily iterate over them if you need. Actually all of them allow iterating using a simple foreach loop:

for (Map.Entry<String,YourClassValue> e : yourMap.entrySet())
  // do something

Answer 2

您可以使用entrySet方法，该方法返回包含地图中键值对的集合。