Java Collections synchronizedNavigableMap() Method

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Description

The Java Collections synchronizedNavigableMap() method is used to return a synchronized navigable (thread-safe) map backed by the specified navigable map.

Declaration

Following is the declaration for java.util.Collections.synchronizedNavigableMap() method.

public static <K,V> NavigableMap<K,V> synchronizedNavigableMap(NavigableMap<K,V> m)

Parameters

m − This is the navigable map to be "wrapped" in a synchronized navigable map.

Return Value

• The method call returns a synchronized navigable view of the specified map.

Exception

NA

Getting Synchronized NavigableMap From a Unsynchronized NavigableMap of String, Integer Pair Example

The following example shows the usage of Java Collection synchronizedNavigableMap(NavigableMap) method. We've created a Map object of String and Integer pairs. Few entries are added and then using synchronizedNavigableMap(NavigableMap) method, we've retrieved the synchronized navigable version of navigable map and printed the map.

package com.tutorialspoint;

import java.util.Collections;
import java.util.TreeMap;
import java.util.NavigableMap;

public class CollectionsDemo {
   public static void main(String[] args) {
      
      // create map
      NavigableMap<String,Integer> map = new TreeMap<String,Integer>();

      // populate the map
      map.put("1",1); 
      map.put("2",2);
      map.put("3",3);

      // create a synchronized navigable map
      NavigableMap<String,Integer> synmap = Collections.synchronizedNavigableMap(map);

      System.out.println("Synchronized Navigable map is :"+synmap);
   }
}

Output

Let us compile and run the above program, this will produce the following result.

Synchronized Navigable map is :{1=1, 2=2, 3=3}

Getting Synchronized NavigableMap From a Unsynchronized NavigableMap of String, String Pair Example

The following example shows the usage of Java Collection synchronizedNavigableMap(NavigableMap) method. We've created a Map object of String and String pairs. Few entries are added and then using synchronizedNavigableMap(NavigableMap) method, we've retrieved the synchronized navigable version of navigable map and printed the map.

package com.tutorialspoint;

import java.util.Collections;
import java.util.TreeMap;
import java.util.NavigableMap;

public class CollectionsDemo {
   public static void main(String[] args) {
      
      // create map
      NavigableMap<String,String> map = new TreeMap<String,String>();

      // populate the map
      map.put("1","TP"); 
      map.put("2","IS");
      map.put("3","BEST");

      // create a synchronized navigable map
      NavigableMap<String,String> synmap = Collections.synchronizedNavigableMap(map);

      System.out.println("Synchronized Navigable map is :"+synmap);
   }
}

Output

Let us compile and run the above program, this will produce the following result.

Synchronized Navigable map is :{1=TP, 2=IS, 3=BEST}

Getting Synchronized NavigableMap From a Unsynchronized NavigableMap of String, Object Pair Example

The following example shows the usage of Java Collection synchronizedNavigableMap(Map) method. We've created a Map object of String and Student pairs. Few entries are added and then using synchronizedNavigableMap(Map) method, we've retrieved the synchronized navigable version of map and printed the map.

package com.tutorialspoint;

import java.util.Collections;
import java.util.TreeMap;
import java.util.NavigableMap;

public class CollectionsDemo {
   public static void main(String[] args) {
      
      // create map
      NavigableMap<String,Student> map = new TreeMap<String,Student>();

      // populate the map
      map.put("1",new Student(1, "Julie")); 
      map.put("2",new Student(2, "Robert"));
      map.put("3",new Student(3, "Adam"));

      // create a synchronized navigable map
      NavigableMap<String,Student> synmap = Collections.synchronizedNavigableMap(map);

      System.out.println("Synchronized Navigable map is :"+synmap);
   }
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

Let us compile and run the above program, this will produce the following result.

Synchronized Navigable map is :{1=[ 1, Julie ], 2=[ 2, Robert ], 3=[ 3, Adam ]}