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In this shot, we will learn how to use the NavigableSet.floor()
method in Java. The NavigableSet.floor()
method is used to obtain the greatest element that is equal to or less than a given element in a set. It returns null
if there is no such element in the set.
The
NavigableSet.floor()
method is present in theNavigableSet
interface inside thejava.util
package.
Let’s understand with the help of an example. Suppose that a NavigableSet
contains [1, 5, 3, 9, 10, 11, 16, 19]. Let 1111 be the element for which we need to determine the floor. So, the result of NavigableSet.floor()
is 1010.
The NavigableSet.floor()
accepts one parameter, i.e., the element for which we need to determine the floor value.
It returns the greatest element that is equal to or less than the given element in the set.
Let’s have a look at the code.
import java.util.NavigableSet;
import java.util.TreeSet;
class Main
{
public static void main(String[] args)
{
NavigableSet<Integer> s = new TreeSet<Integer>();
s.add(6);
s.add(8);
s.add(5);
s.add(3);
s.add(9);
s.add(10);
s.add(17);
System.out.println("Greatest element less than or equal to 11 is: " + s.floor(11));
}
}
Main
class.main()
function.TreeSet
of Integer
type. The NavigableSet
is inherited from SortedSet
, which is actually inherited from TreeSet
only. As SortedSet
and NavigableSet
are interfaces, we cannot instantiate an object of them.NavigableSet
by using the add()
method.NavigableSet.floor()
method and display the result with a message.In this way, we can use the NavigableSet.floor()
method in Java.
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