The concat() method of Chars Class in the Guava library is used to concatenate the values of many arrays into a single array. These char arrays to be concatenated are specified as parameters to this method.
For example: concat(new char[] {a, b}, new char[] {}, new char[] {c}
returns the array {a, b, c}.
Syntax:
public static char[] concat(char[]... arrays)
Parameter: This method accepts arrays as parameter which is the char arrays to be concatenated by this method.
Return Value: This method returns a single char array which contains all the specified char array values in its original order.
Below programs illustrate the use of concat() method:
Example 1:
// Java code to show implementation of// Guava's Chars.concat() method  import com.google.common.primitives.Chars;import java.util.Arrays;  class GFG {      // Driver's code    public static void main(String[] args)    {          // Creating 2 Character arrays        char[] arr1 = { 'H', 'E', 'L', 'L', 'O' };        char[] arr2 = { 'G', 'E', 'E', 'K', 'S' };          // Using Chars.concat() method to combine        // elements from both arrays into a single array        char[] res = Chars.concat(arr1, arr2);          // Displaying the single combined array        System.out.println(Arrays.toString(res));    }} |
Output:
[H, E, L, L, O, G, E, E, K, S]
Example 2:
// Java code to show implementation of// Guava's Chars.concat() method  import com.google.common.primitives.Chars;import java.util.Arrays;  class GFG {      // Driver's code    public static void main(String[] args)    {          // Creating 4 Character arrays        char[] arr1 = { '1', '2', '3' };        char[] arr2 = { '4', '5' };        char[] arr3 = { '6', '7', '8' };        char[] arr4 = { '9', '0' };          // Using Chars.concat() method to combine        // elements from both arrays into a single array        char[] res = Chars.concat(arr1, arr2, arr3, arr4);          // Displaying the single combined array        System.out.println(Arrays.toString(res));    }} |
Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
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