Online Firmware: Collections Synchronization trong Java

Tuesday, October 11, 2016

Collections Synchronization trong Java

Collections.synchronizedXXX(collection)
XXX - List, Map, Set, SortedMap and SortedSet

Collections.Synchronization

Java 2016

List<String> safeList = Collections.synchronizedList(new ArrayList<>());
// adds some elements to the list
Iterator<String> iterator = safeList.iterator();
while (iterator.hasNext()) {
 String next = iterator.next();
 System.out.println(next);
}

Synchronized(nameXXX)

Java 2016

synchronized (safeList) {
 while (iterator.hasNext()) {
 String next = iterator.next();
 System.out.println(next);
 }
}

package com.tutorialspoint;

import java.util.*;

public class CollectionsDemo {
 public static void main(String[] args) {
 // create map
 Map<String,String> map = new HashMap<String,String>();
 
 // populate the map
 map.put("1","TP"); 
 map.put("2","IS");
 map.put("3","BEST");
 
 // create a synchronized map
 Map<String,String> synmap = Collections.synchronizedMap(map);
 
 System.out.println("Synchronized map is :"+synmap);
 }
}

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