Example usage for java.util.stream Collectors joining

Introduction

In this page you can find the example usage for java.util.stream Collectors joining.

Prototype

public static Collector<CharSequence, ?, String> joining(CharSequence delimiter)

Source Link

Document

Returns a Collector that concatenates the input elements, separated by the specified delimiter, in encounter order.

Usage

From source file:Main.java

public static void main(String[] args) {
    Stream<String> s = Stream.of("a", "b", "c");

    String names = s.collect(Collectors.joining(", "));

    System.out.println(names);/* w  ww  .  j  a v a  2 s  . c  o  m*/
}

From source file:Main.java

public static void main(String... args) {
    String n = Food.menu.stream().map(Food::getName).collect(Collectors.joining(", "));
    System.out.println(n);//from w ww.  j a va2s .co  m

}

From source file:Main.java

public static void main(String[] args) {
    // collect as typed array
    Stream<String> words = Stream.of("All", "men", "are", "created", "equal");
    final String joinedWords = words.collect(Collectors.joining(" "));
    System.out.println(joinedWords);

}

From source file:Main.java

public static void main(String[] argv) {
    List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7);

    System.out//  w ww . ja v  a  2s  .  c  om
            .println(numbers.stream().map(number -> String.valueOf(number)).collect(Collectors.joining(", ")));
}

From source file:Main.java

public static void main(String[] args) {
    String names = Employee.persons().stream().filter(Employee::isMale).map(Employee::getName)
            .collect(Collectors.joining(", "));
    System.out.println(names);/* w ww .  j  av  a  2 s.c o m*/

    names = Employee.persons().parallelStream().filter(Employee::isMale).map(Employee::getName)
            .collect(Collectors.joining(", "));
    System.out.println(names);

}

From source file:Main.java

public static void main(String[] args) {

    List<String> names = Arrays.asList("CSS", "CSS3", "HTML", "Java", "Javascript", "Oracle", "MySQL");

    String name5 = names.stream().map(Main::toUpperCase).filter(Main::greaterThanFive).limit(2)
            .collect(Collectors.joining(" + ")).toString() + " = WSM!!!";

    System.out.println(name5);//w ww.j ava2  s  .c o m
}

From source file:Main.java

public static void main(String[] args) {
    Map<Employee.Gender, String> namesByGender = Employee.persons().stream().collect(Collectors
            .groupingBy(Employee::getGender, Collectors.mapping(Employee::getName, Collectors.joining(", "))));
    System.out.println(namesByGender);
}

From source file:Main.java

public static void main(String[] args) {
    Map<Boolean, String> partionedByMaleGender = Employee.persons().stream().collect(Collectors
            .partitioningBy(Employee::isMale, Collectors.mapping(Employee::getName, Collectors.joining(", "))));
    System.out.println(partionedByMaleGender);
}

From source file:Main.java

public static void main(String[] args) {
    Map<Employee.Gender, String> namesByGender = Employee.persons().stream()
            .collect(Collectors.groupingByConcurrent(Employee::getGender,
                    Collectors.mapping(Employee::getName, Collectors.joining(", "))));
    System.out.println(namesByGender);
}

From source file:Main.java

public static void main(String[] args) {
    Map personsByGenderAndDobMonth = Employee.persons().stream().collect(
            Collectors.groupingBy(Employee::getGender, Collectors.groupingBy(p -> p.getDob().getMonth(),
                    Collectors.mapping(Employee::getName, Collectors.joining(", ")))));

    System.out.println(personsByGenderAndDobMonth);
}