How to print list of string inside bracket? [closed]

Answer 1

To group a list of strings using a prefix and suffix you can use Collectors.joining(CharSequence delimiter, CharSequence prefix,CharSequence suffix)), example :

import java.util.List;
import java.util.stream.Collectors;

public class Test {
    public static void main(String[] args) {
        List colors = List.of("Red", "Blue", "Yellow");
        String result = colors.stream().collect(Collectors.joining(" , ", "{", "}"));
        System.out.println(result);
    }
}

this will print {Red , Blue , Yellow} and if list is empty it will print {}

Note that:

• I think you should review your model design ^^ !
• I've used List.of() in my example to demonstrate the "how to", knowing that it requires java 9 or above