Java 8 Stream API Interview Questions: Check if All Elements in a List are Positive in Java 8 Stream

Q20. Check if All Elements in a List are Positive using the Java 8 Stream API | #java8 #streamapi
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 filters out odd numbers from a list and collects them into a set using the Java Stream API.

Key Steps:
This Java program checks if all elements in a list are positive using the Java 8 Streams API. The key method used is allMatch(), which tests whether all elements of the stream satisfy a given predicate.

Here's a summary of how the program works:
1. Input List: A list of integers is created with both positive and negative numbers.

2. Stream Processing: The list is converted into a stream, and allMatch() is used to check if all numbers in the list are greater than 0.

3. Result: The result of the check (true or false) is printed to the console, indicating whether all elements are positive.
• Sample Input: [5, -12, 18, 7, 21

• Output: All positive? false, because -12 is a negative number.

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