Stream with filter and collection - Java 8

We can use stream with filters and collections:-

a) Stream provide link with a collection.

b) Filter can filter the data from linked filter

c) Collector can collect the data based on used filter.

Here is the simple demonstration:-

package com.shadab.collections.stream;

import java.util.Arrays;

import java.util.List;

import java.util.Set;

import java.util.stream.Collectors;

public class StreamDemo {

public static void main(String[] args) {

List<Integer> listIntegers = Arrays.asList(8, 9, 10, 7, 4,3,2,1,5,6,7,9);

System.out.println("All numbers are:- "+listIntegers);

Set<Integer> uniqueOddNumbers = listIntegers.stream().filter(number -> number % 2 != 0).collect(Collectors.toSet());

 

System.out.println("Unique odd numbers are:- "+uniqueOddNumbers);

}

}

If you get surprised by seeing number -> number  in java code please click here.

Output:-

All numbers are:- [8, 9, 10, 7, 4, 3, 2, 1, 5, 6, 7, 9]

Unique odd numbers are:- [1, 3, 5, 7, 9]