Java ConcurrentHashMap class Example: computeIfAbsent() //import statement import java.util.concurrent.*; import java.util.*; public class ConcurrentHashMapcomputeIfAbsentExample1_1 { public static void main(String[] args) { // crete a HashMap and add some values HashMap<String, Integer> ma...
ConcurrentHashMap<Integer , Integer> mymap2 =newConcurrentHashMap<Integer , Integer>(); mymap2.put(1,101); mymap2.put(2,102); mymap2.put(3,103); System.out.println(" mymap2 :"+mymap2.toString()); mymap.put("AA","Java"); mymap.put("BB","angular"); mymap.put("CC","...
getOrDefault(id , "JavaTpoint")); } private static ConcurrentHashMap<Integer, String> initialize() { ConcurrentHashMap<Integer, String> Objmap = new ConcurrentHashMap<>(); Objmap.put(85, "Java"); Objmap.put(80, "php"); return Objmap; } } 输出: Id is:8888 JavaTpoint ...
getOrDefault(id , "JavaTpoint")); } private static ConcurrentHashMap<Integer, String> initialize() { ConcurrentHashMap<Integer, String> Objmap = new ConcurrentHashMap<>(); Objmap.put(85, "Java"); Objmap.put(80, "php"); return Objmap; } } 输出: Id is:8888 JavaTpoint ...
importjava.util.*; publicclassConcurrentHashMapclearExample1 { publicstaticvoidmain(String[] args) { Map<String, String> chm =newConcurrentHashMap<String, String>(); //put is used to add value to map chm.put("1","1"); chm.put("2","10"); ...
publicclassConcurrentHashMapcontainsKeyExample1 { publicstaticvoidmain(String[] args) { ConcurrentHashMap<String, Integer> map =newConcurrentHashMap<String, Integer>(); map.put("java",10); map.put(".net",15); map.put("python",20); ...
publicclassConcurrentHashMapmergeExample1 { publicstaticvoidmain(String[] args) { ConcurrentHashMap<Integer, String> conmap =newConcurrentHashMap<Integer, String>(); conmap.put(1,"Java"); conmap.put(2,"php"); conmap.put(3,".net"); ...
importjava.util.concurrent.*; classConcurrentHashMapnewKeySetExample1 { publicstaticvoidmain(String[] args) { Set<String> hashmap = ConcurrentHashMap.newKeySet(); hashmap.add("AA"); hashmap.add("BBB"); hashmap.add("CCC"); hashmap.add("DDD"); ...
Java ConcurrentHashMap putIfAbsent() Method with Examples on java, concurrenthashmap class, methods, clear() method, compute() method, merge(), contains(), elements(), entryset(), equals(), foreach(), get(), hashcode(), isempty(), keys(), put(), replace(
+ conmap.getOrDefault(id ,"JavaTpoint")); } privatestaticConcurrentHashMap<Integer, String> initialize() { ConcurrentHashMap<Integer, String> Objmap =newConcurrentHashMap<>(); Objmap.put(85,"Java"); Objmap.put(80,"php"); returnObjmap; ...