Use Stream to process list of String and get IntSummaryStatistics - Java Lambda Stream

Java examples for Lambda Stream:Stream

  1. HOME
  2. Java
  3. Lambda Stream
  4. Stream

Description

Use Stream to process list of String and get IntSummaryStatistics

Demo Code



import java.util.Arrays;
import java.util.IntSummaryStatistics;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;

public class StreamDemo1 {
  public static void main(String[] args) {
    List<String> lst = Arrays.asList("aman", "", "sonu", "adefasd","A","java2s.com");
    long count = lst.stream().sorted((String s1, String s2) -> {
      return s2.compareTo(s1);
    }).limit(3).filter(s -> !s.isEmpty()).count();
    System.out.println(count);//w  w w .  j  a  v a  2  s  .  c  om
    Random random = new Random();
    random.ints().limit(2).forEach(System.out::println);

    List<String> lstWithoutEmptyRec = lst.stream().filter(s -> !s.isEmpty()).collect(Collectors.toList());
    for (String s : lstWithoutEmptyRec) {
      System.out.println(s);
    }

    String str = lst.stream().filter(s -> !s.isEmpty()).collect(Collectors.joining(","));
    System.out.println(str);

    List<String> lstRecWithCon = lst.stream().map(s -> s + ":" + s.length()).collect(Collectors.toList());
    for (String s : lstRecWithCon) {
      System.out.println(s);
    }

    lst.forEach(System.out::println);

    List<Integer> numbers = Arrays.asList(3, 2, 2, 3, 7, 3, 5);

    IntSummaryStatistics stats = numbers.stream().mapToInt((x) -> x).summaryStatistics();

    System.out.println("Highest number in List : " + stats.getMax());
    System.out.println("Lowest number in List : " + stats.getMin());
    System.out.println("Sum of all numbers : " + stats.getSum());
    System.out.println("Average of all numbers : " + stats.getAverage());
  }
}

Related Tutorials