Filter Strings Using Stream API in Java

In this article we will learn how to use Java 8 Stream Filter with Example,  I have used String list to filter the names. Stream, A sequence of elements supporting sequential and parallel aggregate operations. Below example will show you how to filter the list with predicate.

StringFilterUsingStream.java

package com.techbyteslearn.tutorial;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class StringFilterUsingStream {

    public static void main(String[] str) {

        List<String> nameList = new ArrayList<String>();

        nameList.add("Roshna");
        nameList.add("Amit Kumar");
        nameList.add("Manoj");
        nameList.add("Neha");
        nameList.add("Rina");
        nameList.add("Ashna");
        nameList.add("Peter");
        nameList.add("Deb Kumar");

        System.out.println("All Names ::");
        nameList.stream().forEach(name -> System.out.println(name));

        // Filter all names ending with "Kumar"
        List<String> filteredList = nameList.stream()
                .filter(name -> name.endsWith("Kumar"))
                .collect(Collectors.toList());

        System.out.println("\nFiltered Names ::");
        filteredList.stream().forEach(name -> System.out.println(name));
    }
}

Output:

All Names ::
Roshna
Amit Kumar
Manoj
Neha
Rina
Ashna
Peter
Deb Kumar

Filtered Names ::
Amit Kumar
Deb Kumar

I changed the comment from “ends with” to “ending with” and formatted the stream expression for readability. The program logic remains the same.

Hope this will help you. Happy Learning.