ConcurrentSkipListMap - put, get, containsKey , containsValue, remove, size methods.
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Map hierarchy in java - Detailed - HashMap, Hashtable, ConcurrentHashMap, LinkedHashMap, TreeMap, ConcurrentSkipListMap, IdentityHashMap, WeakHashMap, EnumMap classes
import java.util.Map;
import java.util.concurrent.ConcurrentSkipListMap;
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class ConcurrentSkipListMapExample {
public static void main(String args[]){
System.out.println("-----1. create Map---");
Map<Integer,String> concurrentSkipListMap=new ConcurrentSkipListMap<Integer,String>();
System.out.println("\n-----2. put key-value pair in Map ---");
concurrentSkipListMap.put(11, "ankit");
concurrentSkipListMap.put(21, "mittal");
concurrentSkipListMap.put(31, "javaMadeSoEasy");
System.out.println("\n-----3. get method returns value corresponding to key ---");
System.out.println("concurrentSkipListMap.get(11) : "+concurrentSkipListMap.get(11));
System.out.println("\n-----4. containsKey method returns true if map "
+ "contains a mapping for the specified key ---");
System.out.println("concurrentSkipListMap.containsKey(11) : "+concurrentSkipListMap.containsKey(11));
System.out.println("\n-----5. containsValue method returns true if map maps one "
+ "or more keys to the specified value. ---");
System.out.println("concurrentSkipListMap.containsValue(\"ankit\") : "+concurrentSkipListMap.containsValue("ankit"));
System.out.println("concurrentSkipListMap.remove(11) : "+concurrentSkipListMap.remove(11));
System.out.println("\n-----6. size ---");
System.out.println("concurrentSkipListMap.size() : "+concurrentSkipListMap.size());
}
}
/*OUTPUT
-----1. create Map---
-----2. put key-value pair in Map ---
-----3. get method returns value corresponding to key ---
concurrentSkipListMap.get(11) : ankit
-----4. containsKey method returns true if map contains a mapping for the specified key ---
concurrentSkipListMap.containsKey(11) : true
-----5. containsValue method returns true if map maps one or more keys to the specified value. ---
concurrentSkipListMap.containsValue("ankit") : true
concurrentSkipListMap.remove(11) : ankit
-----6. size ---
concurrentSkipListMap.size() : 2
*/
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Core Java