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What is StringJoiner class in Java 8?
The StringJoiner class in Java 8 constructs a sequence of characters. This sequence is separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix.
The following are the constructors of the StringJoiner class:
StringJoiner(CharSequence delimiter): This constructor constructs a StringJoiner with no characters in it and with no prefix or suffix. It used the copy of the supplied delimiter.
StringJoiner(CharSequence delimiter, CharSequence prefix, CharSequence suffix) This constructor constructs a StringJoiner with no characters in it. It uses the copies of the supplied prefix, delimiter and suffix.
The syntax is as follows:
public final class StringJoiner extends Object
Here, class Object is the root of the class hierarchy.
To work with the StringJoiner in Java 8, import the following package:
import java.util.StringJoiner;
The following is an example to implement StringJoiner method in Java. We have used comma as the delimiter here:
Example
import java.util.StringJoiner;
public class Demo {
public static void main(String[] args) {
StringJoiner strJoin = new StringJoiner(",");
strJoin.add("One");
strJoin.add("Two");
strJoin.add("Three");
strJoin.add("Four");
strJoin.add("Five");
strJoin.add("Six");
strJoin.add("Seven");
System.out.println(strJoin.toString());
}
}output
One,Two,Three,Four,Five,Six,Seven
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