Example usage for java.util Arrays stream

Introduction

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

Prototype

public static DoubleStream stream(double[] array)

Source Link

Document

Returns a sequential DoubleStream with the specified array as its source.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    Arrays.stream(new int[] { 1, 2, 3 }).map(n -> 2 * n + 1).average().ifPresent(System.out::println);
}

From source file:Main.java

public static void main(String[] args) {
    Integer[] numbers = { 1, 2, 3, 4 };
    Stream<Integer> arrayStreams2 = Arrays.stream(numbers);

    System.out.println(Arrays.toString(arrayStreams2.toArray()));
}

From source file:Main.java

public static void main(String[] args) {

    int[] numbers = { 2, 3, 5, 7, 11, 13 };
    IntStream intStream = Arrays.stream(numbers);
    intStream = intStream.limit(3);//from w  w w .j av a 2  s .  com
    System.out.println(intStream.sum());
}

From source file:Main.java

public static void main(String[] args) {
    Integer[] numbers = { 1, 2, 3, 4 };
    Stream<Integer> arrayStreams2 = Arrays.stream(numbers);

    System.out.println(arrayStreams2.collect(Collectors.toList()));

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    // map/*w ww. ja  v  a 2 s  .c o m*/
    List<String> words = Arrays.asList("Hello", "World");

    words.stream().flatMap((String line) -> Arrays.stream(line.split(""))).distinct()
            .forEach(System.out::println);

}

From source file:Main.java

public static void main(String[] argv) {
    Stream.of("This", "is", "Java8", "Stream").forEach(System.out::println);

    String[] stringArray = new String[] { "Streams", "can", "be", "created", "from", "arrays" };
    Arrays.stream(stringArray).forEach(System.out::println);
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    long uniqueWords = Files.lines(Paths.get("Main.java"), Charset.defaultCharset())
            .flatMap(line -> Arrays.stream(line.split(" "))).distinct().count();

    System.out.println("There are " + uniqueWords + " unique words in data.txt");

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    List<Dish> menu = Arrays.asList(new Dish("pork", false, 800, Dish.Type.MEAT),
            new Dish("beef", false, 700, Dish.Type.MEAT), new Dish("chicken", false, 400, Dish.Type.MEAT),
            new Dish("rice", true, 350, Dish.Type.OTHER), new Dish("pizza", true, 550, Dish.Type.OTHER),
            new Dish("prawns", false, 400, Dish.Type.FISH), new Dish("salmon", false, 450, Dish.Type.FISH));
    List<Integer> numbers = Arrays.asList(3, 4, 5, 1, 2);

    Arrays.stream(numbers.toArray()).forEach(System.out::println);
    int calories = menu.stream().mapToInt(Dish::getCalories).sum();
    System.out.println("Number of calories:" + calories);

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    List<Dish> menu = Arrays.asList(new Dish("pork", false, 800, Dish.Type.MEAT),
            new Dish("beef", false, 700, Dish.Type.MEAT), new Dish("chicken", false, 400, Dish.Type.MEAT),
            new Dish("rice", true, 350, Dish.Type.OTHER), new Dish("pizza", true, 550, Dish.Type.OTHER),
            new Dish("prawns", false, 400, Dish.Type.FISH), new Dish("salmon", false, 450, Dish.Type.FISH));
    List<Integer> numbers = Arrays.asList(3, 4, 5, 1, 2);

    Arrays.stream(numbers.toArray()).forEach(System.out::println);
    // max and OptionalInt
    OptionalInt maxCalories = menu.stream().mapToInt(Dish::getCalories).max();
    System.out.println("Number of calories:" + maxCalories);

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    List<Dish> menu = Arrays.asList(new Dish("pork", false, 800, Dish.Type.MEAT),
            new Dish("beef", false, 700, Dish.Type.MEAT), new Dish("chicken", false, 400, Dish.Type.MEAT),
            new Dish("rice", true, 350, Dish.Type.OTHER), new Dish("pizza", true, 550, Dish.Type.OTHER),
            new Dish("prawns", false, 400, Dish.Type.FISH), new Dish("salmon", false, 450, Dish.Type.FISH));
    List<Integer> numbers = Arrays.asList(3, 4, 5, 1, 2);

    Arrays.stream(numbers.toArray()).forEach(System.out::println);
    // max and OptionalInt
    OptionalInt maxCalories = menu.stream().mapToInt(Dish::getCalories).max();
    System.out.println("Number of calories:" + maxCalories);

    int max;/*from   www .  j  a  v  a  2  s  . c om*/
    if (maxCalories.isPresent()) {
        max = maxCalories.getAsInt();
    } else {
        // we can choose a default value
        max = 1;
    }
    System.out.println(max);
}