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:
// Java code to show implementation of// Guava's Booleans.toArray() method import com.google.common.primitives.Booleans;import java.util.Arrays;import java.util.List; class GFG { // Driver's code public static void main(String[] args) { // Creating a List of Boolean List<Boolean> myList = Arrays.asList(false, true, false, false); // Using Booleans.toArray() method to convert // a List or Set of Boolean to an array // of Boolean boolean[] arr = Booleans.toArray(myList); // Displaying an array containing each // value of collection, // converted to a boolean value System.out.println(Arrays.toString(arr)); }} |
[false, true, false, false]
Example 2:
// Java code to show implementation of// Guava's Booleans.toArray() method import com.google.common.primitives.Booleans;import java.util.Arrays;import java.util.List; class GFG { // Driver's code public static void main(String[] args) { // Creating a List of Boolean List<Boolean> myList = Arrays.asList(true, true, false); // Using Booleans.toArray() method to convert // a List or Set of Boolean to an array // of Boolean boolean[] arr = Booleans.toArray(myList); // Displaying an array containing each // value of collection, // converted to a boolean value System.out.println(Arrays.toString(arr)); }} |
[true, true, false]
