Problem Description

Write a Java program to demonstrate the usage of Stream API for filtering and collecting data.

Code

StreamExample.java

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

public class StreamExample {
    public static void main(String[] args) {
        List<String> names = new ArrayList<>();
        names.add("John");
        names.add("Jane");
        names.add("Jack");
        names.add("Doe");

        // Filter names starting with 'J'
        List<String> jNames = names.stream()
                .filter(name -> name.startsWith("J"))
                .collect(Collectors.toList());

        System.out.println("Names starting with J: " + jNames);
    }
}

Output

Names starting with J: [John, Jane, Jack]

Explanation

Stream API: Used to process collections of objects.
filter(): Filters elements based on a condition.
collect(): Collects the results into a collection (e.g., List).

Java Program to Demonstrate Stream API

Problem Description

Code

Output

Explanation

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