Java 8 Stream API Interview Questions: Collect Prime Numbers from a List using Java 8 Stream API
Q27. Collect Prime Numbers from a List using Stream API Java 8
Welcome to Learn Code With Saurabh! In this video, you will learn: Java program demonstrates how to use Java 8 Streams to perform conditional filtering on collections.
Explanation of the code:
This Java program collects prime numbers from a list using Java 8's Streams API.
1. Method isPrimeNumber(int num): It checks if a given number is prime. A number is considered prime if:
o It is 2 (since 2 is the smallest prime number).
o It is greater than 1 and not divisible by any number from 2 up to the square root of the number.
2. Main Logic:
o A list of integers is created: [2, 3, 4, 5, 6, 7, 8, 9, 10].
o The stream() method is used to create a stream from the list.
o The filter() method is applied to filter prime numbers using the isPrimeNumber method.
o The filtered prime numbers are collected into a list using collect(Collectors.toList()).
3. Output: The prime numbers from the input list are printed: [2, 3, 5, 7].
This program efficiently uses Java 8's Stream API to process and filter data.
Source Code: https://github.com/learncodewithsaura...
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