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Copy pathstream.java
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47 lines (33 loc) · 1.36 KB
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package Misc;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.*;
public class stream {
public static void main(String args[])
{
// create a list of integers
List<Integer> number = Arrays.asList(2,3,4,5);
// demonstration of map method
List<Integer> square = number.stream().map(x -> x*x).collect(Collectors.toList());
System.out.println(square);
// create a list of String
List<String> names = Arrays.asList("Reflection","Collection","Stream");
// demonstration of filter method
List<String> result = names.stream().filter(s->s.startsWith("S")).collect(Collectors.toList());
System.out.println(result);
// demonstration of sorted method
List<String> show = names.stream().sorted().collect(Collectors.toList());
System.out.println(show);
// create a list of integers
List<Integer> numbers = Arrays.asList(2,3,4,5,2);
// collect method returns a set
Set<Integer> squareSet = numbers.stream().map(x->x*x).collect(Collectors.toSet());
System.out.println(squareSet);
// demonstration of forEach method
number.stream().map(x->x*x).forEach(y->System.out.println(y));
// demonstration of reduce method
int even = number.stream().filter(x->x%2==0).reduce(0,(ans,i)-> ans+i);
System.out.println(even);
}
}