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Java Guava | Chars.join() method with Examples

  • Last Updated : 31 Jan, 2019

The join() method of Chars Class in the Guava library is used to combine or join all the given char values separated by a separator. These char values are passed a parameter to this method. This method also takes the separator as the parameter. This method returns a String which is the result of join operation on the specified char values.

For example: join(“-“, 1L, 2L, 3L) returns the string “1-2-3”.

Syntax:

public static String join(String separator, char… array)

Parameters: This method accepts two mandatory parameters:



  • separator: which is the character that occurs in between the joined char values.
  • array: which is an array of char values that are to be joined.

Return Value: This method returns a string containing all the given char values separated by separator.

Below programs illustrate the use of this method:

Example 1:




// Java code to show implementation of
// Guava's Chars.join() method
  
import com.google.common.primitives.Chars;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a char array
        char[] arr = { 'a', 'b', 'c', 'd', 'e' };
  
        // Using Chars.join() method to get a
        // string containing the elements of array
        // separated by a separator
        System.out.println(Chars.join("#", arr));
    }
}
Output:
a#b#c#d#e

Example 2:




// Java code to show implementation of
// Guava's Chars.join() method
  
import com.google.common.primitives.Chars;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a char array
        char[] arr = { 'G', 'E', 'E', 'K', 'S' };
  
        // Using Chars.join() method to get a
        // string containing the elements of array
        // separated by a separator
        System.out.println(Chars.join("*", arr));
    }
}
Output:
G*E*E*K*S

Reference: https://google.github.io/guava/releases/18.0/api/docs/com/google/common/primitives/Chars.html#join(java.lang.String, %20char…)

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