Java Guava | Booleans.toArray() method with Examples
The toArray() method of Booleans Class in the Guava library is used to convert the boolean values, passed as the parameter to this method, into a Boolean Array. These boolean values are passed as a Collection to this method. This method returns a Boolean array.
Syntax:
public static boolean[] toArray(Collection<Boolean> collection)
Parameters: This method accepts a mandatory parameter collection which is the collection of boolean values to be converted in to a Boolean array.
Return Value: This method returns a boolean array containing the same values as a collection, in the same order.
Exceptions: This method throws NullPointerException if the passed collection or any of its elements is null.
Below programs illustrate the use of toArray() method:
Example 1:
import com.google.common.primitives.Booleans;
import java.util.Arrays;
import java.util.List;
class GFG {
public static void main(String[] args)
{
List<Boolean> myList
= Arrays.asList( false , true ,
false , false );
boolean [] arr = Booleans.toArray(myList);
System.out.println(Arrays.toString(arr));
}
}
|
Output:
[false, true, false, false]
Example 2:
import com.google.common.primitives.Booleans;
import java.util.Arrays;
import java.util.List;
class GFG {
public static void main(String[] args)
{
List<Boolean> myList
= Arrays.asList( true , true , false );
boolean [] arr = Booleans.toArray(myList);
System.out.println(Arrays.toString(arr));
}
}
|
Output:
[true, true, false]
Reference: https://google.github.io/guava/releases/20.0/api/docs/com/google/common/primitives/Booleans.html#toArray-java.util.Collection-
Last Updated :
30 Jan, 2019
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