SortedMap接口源码解析

TreeMap的父接口

package java.util;

public interface SortedMap<K,V> extends Map<K,V> {

    Comparator<? super K> comparator();

    SortedMap<K,V> subMap(K fromKey, K toKey);

    SortedMap<K,V> headMap(K toKey);

    SortedMap<K,V> tailMap(K fromKey);

    K firstKey();

    K lastKey();

    Set<K> keySet();

    Collection<V> values();

    Set<Map.Entry<K, V>> entrySet();
}