AbstractSet isEmpty() method in Java with Example
The isEmpty() method of AbstractSet in Java is used to check whether this AbstractSet is empty or not. It returns an boolean value stating the same.
Syntax:
public boolean isEmpty()
Parameters: This function has no parameters.
Returns: The method returns an boolean value which states that this instance of the AbstractSet is empty or not.
Below examples illustrates the AbstractSet.isEmpty() method:
Example 1:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
AbstractSet<Integer> arr
= new TreeSet<Integer>();
arr.add( 1 );
arr.add( 2 );
arr.add( 3 );
arr.add( 4 );
System.out.println( "AbstractSet: "
+ arr);
System.out.println( "Is AbstractSet empty? "
+ arr.isEmpty());
}
}
|
Output:
AbstractSet: [1, 2, 3, 4]
Is AbstractSet empty? false
Example 2:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
AbstractSet<String> arr
= new TreeSet<String>();
System.out.println( "AbstractSet: "
+ arr);
System.out.println( "Is AbstractSet empty? "
+ arr.isEmpty());
}
}
|
Output:
AbstractSet: []
Is AbstractSet empty? true
Last Updated :
24 Dec, 2018
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