java.util.SortedMap is a subinterface of the java.util.Map interface in Java. It extends the Map interface to provide a collection that stores map entries in a sorted order. This sorted order is determined by the keys of the map entries, which are sorted based on either their natural ordering or by a custom Comparator provided by the user.
The putAll method is a method in the SortedMap interface that allows you to add all of the key-value pairs from one SortedMap to another. Here are some brief code examples:
In this example, we create a TreeMap called map1 with three key-value pairs. We then create another TreeMap called map2 and use putAll to add all of the key-value pairs from map1 into map2. We then print out map2 to verify that all of the key-value pairs were successfully added.
Example 2: Using putAll with a ConcurrentSkipListMap
In this example, we create a ConcurrentSkipListMap called map1 with three key-value pairs. We then create another ConcurrentSkipListMap called map2 and use putAll to add all of the key-value pairs from map1 into map2. We then print out map2 to verify that all of the key-value pairs were successfully added.
Both of these examples use the java.util package library, which is built into the Java standard library.
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