Collect distinct value from List - Java Algorithm

Java examples for Algorithm:List

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Description

Collect distinct value from List

Demo Code



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

public class Main {
  public static void main(String[] args) {
    Random random = new Random();
    // 50 no's min-0 max-100
    random.ints(50, 0, 100).limit(10).forEach(System.out::println);
    // Filter With Collector
    List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd", "", "jkl");
    long countNonEmpty = strings.stream().filter(str -> {
      return !str.isEmpty();
    }).count();//from w w  w. j a  v  a  2s  . c o  m
    System.out.println("Non Empty values:" + countNonEmpty);
    String stringValue = strings.stream().filter(str -> {
      return !str.isEmpty();
    }).collect(Collectors.joining(","));
    System.out.println(stringValue);
    //
    List<Integer> numbers = Arrays.asList(1, 2, 13, 4, 15, 6, 17, 8, 19);
    List<Integer> squaresList = numbers.stream().map(i -> i * i).distinct().collect(Collectors.toList());
    System.out.println(squaresList);
  }
}

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