The concat() method of Booleans Class in the Guava library is used to concatenate the values of many arrays into a single array. These boolean arrays to be concatenated are specified as parameters to this method.
For example: concat(new boolean[] {a, b}, new boolean[] {}, new boolean[] {c} returns the array {a, b, c}.
Syntax :
public static boolean[] concat(boolean[]... arrays)
Parameter: This method accepts arrays as parameter which is the boolean arrays to be concatenated by this method.
Return Value: This method returns a single boolean array which contains all the specified boolean array values in its original order.
Below programs illustrate the use of concat() method:
Example-1 :
// Java code to show implementation of// Guava's Booleans.concat() method  import com.google.common.primitives.Booleans;import java.util.Arrays;  class GFG {      // Driver's code    public static void main(String[] args)    {          // Creating 2 Boolean arrays        boolean[] arr1 = { true, false, true };        boolean[] arr2 = { false, false, false, true };          // Using Booleans.concat() method to combine        // elements from both arrays into a single array        boolean[] res = Booleans.concat(arr1, arr2);          // Displaying the single combined array        System.out.println(Arrays.toString(res));    }} |
Output:
[true, false, true, false, false, false, true]
Example-2 :
// Java code to show implementation of// Guava's Booleans.concat() method  import com.google.common.primitives.Booleans;import java.util.Arrays;  class GFG {      // Driver's code    public static void main(String[] args)    {        // Creating 4 boolean arrays        boolean[] arr1 = { true, false, false };        boolean[] arr2 = { true, true };        boolean[] arr3 = { false, false, false };        boolean[] arr4 = { false, true };          // Using Booleans.concat() method to combine        // elements from both arrays into a single array        boolean[] res            = Booleans.concat(arr1, arr2, arr3, arr4);          // Displaying the single combined array        System.out.println(Arrays.toString(res));    }} |
Output:
[true, false, false, true, true, false, false, false, false, true]
