Java Collections synchronizedNavigableSet() Method

The synchronizedNavigableSet() method of Java Collections class is used to get a synchronized (thread-safe) navigable set backed by the specified navigable set.

Syntax

Following is the declaration of synchronizedNavigableSet() method:

Parameter

Parameter	Description	Required/Optional
s	It is the navigable set which will be wrapped in a synchronized navigable set.	Required

Returns

The synchronizedNavigableSet() method returns a synchronized view of the specified Navigable Set.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample1 {
	public static void main(String[] args) {
		NavigableSet<String> set = new TreeSet<>();
		set.add("Instagram");
		set.add("JavaTpoint");
		set.add("Facebook");
		set.add("Google");
		Set<String> synset = Collections.synchronizedNavigableSet(set);
		System.out.println("Synchronized navigable set is :" + synset);	            
	      }
}

Test it Now

Output:

Synchronized navigable set is :[Facebook, Google, Instagram, JavaTpoint]

Example 2

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample2 {
	public static void main(String[] args) {
		NavigableSet<Integer> set = new TreeSet<>();
		set.add(1001);
		set.add(1002);
		set.add(1003);
		set.add(1004);
		set.add(1005);
		System.out.println("Set before Synchronized navigable set: " + set);
		Set<Integer> synset = Collections.synchronizedNavigableSet(set);	
	     set.remove(1004);
	     System.out.println("Synchronized navigable set after remove(1004):" + synset);
	     }
}

Test it Now

Output:

Set before Synchronized navigable set: [1001, 1002, 1003, 1004, 1005]
Synchronized navigable set after remove(1004):[1001, 1002, 1003, 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 CollectionsSynchronizedNavigableSetExample3 {
    private static AtomicInteger atomicInteger = new AtomicInteger(0);
    public static void main(String[] args) throws InterruptedException {
        NavigableSet<Integer> s = new TreeSet<>();
        NavigableSet<Integer> theSet = Collections.synchronizedNavigableSet(s);
        final ExecutorService e = Executors.newFixedThreadPool(1000);
        for (int i = 1; i <= 1000; i++) {
            e.execute(() -> {
                int n = atomicInteger.incrementAndGet();
                try {
                    theSet.add(n);
                } catch (Exception e1) {
                    System.out.println(e1 + " " + n);
                }
            });
        }
        e.shutdown();
        e.awaitTermination(1000, TimeUnit.SECONDS);
        System.out.println(theSet.size());//should be 1000
    }
}

Test it Now

Output:

Example 4

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample4 {
	public static void main(String[] args) {
		NavigableSet<Integer> set = new TreeSet<>();
		set.add(1001);
		set.add(1002);
		set.add(1003);
		set.add(1004);
		set.add(1005);
		System.out.println("Set before Synchronized navigable set: " + set);
		Collections.synchronizedNavigableSet(set);
		Iterator<Integer> itr=set.iterator();
		System.out.println("Set after Synchronized navigable set-");
		while(itr.hasNext()){  
			System.out.println(itr.next());  
		 	}         
	      }
}

Test it Now

Output:

Set before Synchronized navigable set: [1001, 1002, 1003, 1004, 1005]
Set after Synchronized navigable set-
1001
1002
1003
1004
1005

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Java Collections synchronizedNavigableSet() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3