Java Collections emptyNavigableMap() Method with Examples

by Online Tutorials Library July 22, 2022

Java Collections emptyNavigableMap() Method

The emptyNavigableMap() method of Java Collections class returns an empty navigable map which is immutable.

Syntax

Following is the declaration of emptyNavigableMap() method:

Parameter

This method does not accept any parameter.

Returns

The emptyNavigableMap() method returns an empty immutable Navigable Map.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

  import java.util.*;  public class CollectionsEmptyNavigableMapExample1 {  public static void main(String[] args) {       //Create an empty Map          NavigableMap EmptyNavMap = Collections.emptyNavigableMap();       System.out.println(“Created Empty Navigable Map: “+EmptyNavMap);       }    }  ,string>

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Output:

Created Empty Navigable Map: {}

Example 2

  import java.util.*;  public class CollectionsEmptyNavigableMapExample2 {  public static void main(String[] args) {       //Create an empty Map           NavigableMap EmptyNavMap = Collections.emptyNavigableMap();       System.out.println(“Created Empty Navigable Map: “+EmptyNavMap);       // try to add elements       EmptyNavMap.put(“1″,”from tutoraspire.com”);       }    }  ,string>

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Output:

Created Empty Navigable Map: {}  Exception in thread "main" java.lang.UnsupportedOperationException  at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)  at myPackage.CollectionsEmptyNavigableMapExample2.main(CollectionsEmptyNavigableMapExample2.java:9)

Example 3

  import java.util.*;  public class CollectionsEmptyNavigableMapExample3 {  public static void main(String[] args) {  //Create an empty Map           NavigableMap empNavMap = Collections.emptyNavigableMap();        empNavMap.put(1, 23424);        empNavMap.put(2, 65776);            System.out.println(“Created empty immutable Navigable Map: “+empNavMap);             }    }  ,>

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Output:

Exception in thread "main" java.lang.UnsupportedOperationException  at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)  at myPackage.CollectionsEmptyNavigableMapExample3.main(CollectionsEmptyNavigableMapExample3.java:7)

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Java Collections emptyNavigableMap() Method with Examples

Java Collections emptyNavigableMap() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3

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