Java Guava | Longs.join() method with Examples
Last Updated :
31 Jan, 2019
The join() method of Longs Class in the Guava library is used to combine or join all the given long values separated by a separator. These long 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 long values.
For example: join(“-“, 1L, 2L, 3L) returns the string “1-2-3”.
Syntax:
public static String join(String separator, long… array)
Parameters: This method accepts two mandatory parameters:
- separator: which is the character that occurs in between the joined long values.
- array: which is an array of long values that are to be joined.
Return Value: This method returns a string containing all the given long values separated by separator.
Below programs illustrate the use of this method:
Example 1:
import com.google.common.primitives.Longs;
import java.util.Arrays;
class GFG {
public static void main(String[] args)
{
long [] arr = { 2 , 4 , 6 , 8 , 10 };
System.out.println(Longs.join( "#" , arr));
}
}
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Example 2:
import com.google.common.primitives.Longs;
import java.util.Arrays;
class GFG {
public static void main(String[] args)
{
long [] arr = { 3 , 5 , 7 , 9 , 11 };
System.out.println(Longs.join( "*" , arr));
}
}
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Reference: https://google.github.io/guava/releases/21.0/api/docs/com/google/common/primitives/Longs.html#join-java.lang.String-long…-
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