Java Collections checkedNavigableSet() Method with Examples

Last Updated : 03 Jan, 2022

The checkedQueue() method of Java Collections is a method that returns a dynamically and typesafe view of the given Set. Any attempt to insert an element of the wrong type will result in an immediate ClassCastException.

Syntax:

public static <E> NavigableSet<E> checkedNavigableSet(NavigableSet<E> set, Class<E> datatype)

Parameters:

set is an input set data
datatype is the type of elements that set can hold

Return Type: This method will return the dynamically and typesafe view of the given Set.

Exceptions:

ClassCastException: ClassCastException is a runtime exception raised in Java when we try to improperly cast a class from one type to another.

Example 1:

Java

// Java program to create a Tree set and // display the elements in a typesafe way import java.util.*; public class GFG {  public static void main(String[] args)  {  // create a set of string type  NavigableSet<String> data = new TreeSet<>();  // Insert the values into the set  data.add("java");  data.add("php/jsp");  data.add("python");  data.add("R");  // type safe view of the set  System.out.println(Collections.checkedNavigableSet(  data, String.class));  } }

Output

[R, java, php/jsp, python]

Example 2:

Java

// Java program to create a Tree set and // display the elements in a typesafe way import java.util.*; public class GFG {  public static void main(String[] args)  {  // create a set of string type  NavigableSet<Integer> data = new TreeSet<>();  // Insert the values into the set  data.add(1);  data.add(2);  data.add(3);  data.add(4);  // type safe view of the set  System.out.println(Collections.checkedNavigableSet(  data, Integer.class));  } }