Java Collections synchronizedSortedMap() Method with Examples

by Online Tutorials Library July 22, 2022

Java Collections synchronizedSortedMap() Method

The synchronizedSortedMap() method of Java Collections class is used to get a synchronized (thread-safe) sorted map backed by the specified sorted map.

Syntax

Following is the declaration of synchronizedSortedMap() method:

Parameter

Parameter	Description	Required/Optional
m	It is the sorted map which will be wrapped in a synchronized sorted map.	Required

Returns

The synchronizedSortedMap() method returns a synchronized view of the specified sorted Map.

Exceptions

Example 1

  import java.util.*;  public class CollectionsSynchronizedSortedMapExample1 {  public static void main(String[] args) {  SortedMap map = new TreeMap();  map.put(“1”, “Whatsapp”);  map.put(“4”, “Instagram”);  map.put(“3”, “Facebook”);  map.put(“2”, “Twitter”);  SortedMap sortmap = Collections.synchronizedSortedMap(map);  System.out.println(“Synchronized sorted map is :” + sortmap);                    }  }  ,>,>,>

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Output:

Synchronized sorted map is :{1=Whatsapp, 2=Twitter, 3=Facebook, 4=Instagram}

Example 2

  import java.util.*;  public class CollectionsSynchronizedSortedMapExample2 {  public static void main(String[] args) {  SortedMap<Integer, Integer> map = new TreeMap<>();  map.put(1, 1001);  map.put(2, 1002);  map.put(5, 1005);  map.put(4, 1004);  map.put(3, 1003);  //System.out.println(“Map before Synchronized map: ” + map);  SortedMap<Integer, Integer> synmap = Collections.synchronizedSortedMap(map);      System.out.println(“Synchronized sorted map:” + synmap);       }  }  

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Output:

Synchronized sorted map:{1=1001, 2=1002, 3=1003, 4=1004, 5=1005}

Example 3

  import java.util.*;  import java.util.concurrent.ExecutorService;  import java.util.concurrent.Executors;  import java.util.concurrent.TimeUnit;  import java.util.concurrent.atomic.AtomicInteger;  public class CollectionsSynchronizedSortedMapExample3 {      private static AtomicInteger counter = new AtomicInteger();      public static void main(String… args) throws InterruptedException {          SortedMap<Integer, Integer> m = new TreeMap<>();          SortedMap<Integer, Integer> map = Collections.synchronizedSortedMap(m);          final ExecutorService e = Executors.newFixedThreadPool(10);          for (int i = 0; i < 10; i++) {              e.execute(() -> map.put(counter.incrementAndGet(),                      (int) (Math.random() * 100)));          }          e.shutdown();          e.awaitTermination(1000, TimeUnit.SECONDS);          System.out.println(map.size());//should be 10      }  }  

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Output:

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Java Collections synchronizedSortedMap() Method with Examples

Java Collections synchronizedSortedMap() Method

Syntax

Parameter

Returns

Exceptions

Example 1

Example 2

Example 3

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