Java 8 Stream API Interview Questions: Filter Strings Containing a Specific Character from List

Q25 Filter Strings Containing a Specific Character using Stream API in Java 8
Welcome to Learn Code With Saurabh! In this video, you will learn: the Java program demonstrates how to use Java 8 Streams to perform conditional filtering on collections.

Explanation of the code:
This Java program demonstrates how to use the Java 8 Streams API to filter a list of strings to include only those containing a specific character ('a').
1. Imports: The program imports necessary classes from java.util, including Arrays, List, and Collectors.

2. Main Class: The class is named FilterStringsByCharacter_25.

3. Main Method:
o A list of strings called words is created, containing the values: "apple", "banana", "grape", "kiwi", and "orange".
o The program utilizes the Stream API to filter the list:
 It converts the list to a stream with words.stream().
 The filter method is applied, where a lambda expression checks if each string contains the character "a".
 The filtered results are collected back into a list using collect(Collectors.toList()).

4. Output: The program prints the filtered list, which contains only the strings that include the character 'a', resulting in: [apple, banana, grape, orange].

Key Features
• Stream API: This program utilizes the functional programming capabilities introduced in Java 8, enabling more concise and readable code for processing collections.

• Lambda Expression: The use of a lambda expression (word - word.contains("a")) provides a clean way to define the filtering logic directly within the stream processing pipeline.

This program effectively showcases how to filter a collection of strings based on a specific character condition using modern Java features.

Source Code: https://github.com/learncodewithsaurabh/Java8Programs/blob/main/src/Java8Programs/FilterStringsByCharacter_25.java

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