Check if an array contains any elements in another array in java. contains () Using a for-loop Collections .
Check if an array contains any elements in another array in java. In this article, we'll take a look at how to check if an array contains a value or element in Java. The array argument is treated as one value you want to wrap (you get a list of arrays of ints), not as vararg. boolean match = Arrays. stream(arr). The . We can check if an element or value is present or not in two types of arrays, For String Array For Primitive Array 1. Example: Here, we will use the contains () method to check if the ArrayList of Strings contains a specific element. Similarly May 17, 2021 · In this quick beginner-friendly tutorial, we will see how to check if an array contains a value or an element using the Java Programming Language. This is one of the things that most beginners tend to learn, and it is a useful thing to know in general. Array 2 is sub array of Array 1 if all elements are the same Part 3: compare each element of 2 array when array 2 size is smaller than array 1 size. Several techniques can accomplish this, each with its own performance characteristics and readability. Sep 22, 2013 · Closed 10 years ago. Dec 7, 2014 · When reading your solution, i see there are 3 parts. See full list on baeldung. asList() and use contains() on the list, etc. Nov 23, 2024 · Learn effective techniques to verify if an array includes any elements from another array using JavaScript. asList (), and binarySearch (). Jun 24, 2024 · 5. Choose the right approach today! Feb 3, 2023 · To check if an element is in an array, we can use Arrays class to convert the array to ArrayList and use the contains() method to check the item’s presence. While contains() is directly available in the Java Collection framework, containsAny() can be efficiently implemented using Java 8 Streams to check for the presence of any elements from one collection in another. contains method. contains(any element of list2) Is looping through all the elements of list2 and checking the elements one by one the only way? Are you tired of manually searching through arrays to check if they contain any elements from another array? Look no further! In this blog post, we'll explore a simple and efficient solution to solve this problem using JavaScript. Quick solution: Description The includes() method returns true if an array contains a specified value. But, fear not, there are several ways to achieve this using other Java constructs and methods like loops, Lists, and Arrays class methods. Jul 22, 2025 · Explore various efficient methods in Java to determine if an array holds a specific value, from basic loops to modern stream operations. Your best bet is to write a little utility to do a simple linear search. asList()) and call indexOf() or contains(). isEqual, it uses the static method equals from the Objects class and it will do the null check for you before calling equals on the first argument. We can use the indexOf() method to find the index of item in the array. The function returns Feb 2, 2012 · Unfortunately, Java does not have an Arrays. So possible workarounds are: Using Predicate. May 2, 2024 · Learn to create a Java Stream utility class with contains(), containsAll() or containsAny() methods and learn to use them with examples. For String Array, we can check if an array contains a particular string value using the contains() method. Nov 19, 2020 · Introduction Whether in Java, or any other programming language, it is a common occurrence to check if an array contains a value. Our task is to check whether the key element is present in the array. Nov 27, 2014 · It comes quite complicated if there are only or any null values in the array (resulting in a NullPointerException). Arrays. If the array is large and speed is a concern, you could sort the array, and then use Arrays. The size of the first array is guaranteed to be less than or equal to the size of the second array. For String Array. Prevent NullPointerException and improve your Java programming skills. Part 1: if array 2 is smaller than array 1, then array 2 can not be a sub array of array 1 Part 2: compare each element of 2 array when they have the same size. Sep 15, 2025 · Learn 4 proven methods to check if Java array contains value: for-loops, Streams, Arrays. Is there any way to determine whether an ArrayList contains any element of a different ArrayList? Like this: list1. com Jul 24, 2025 · This blog post will comprehensively cover the concepts, usage methods, common practices, and best practices related to checking if a Java array contains a particular element. This guide will walk you through multiple techniques to check for array elements, compare their performance characteristics, and help you choose the right method for your specific use case. asList (). binarySearch(). Sep 7, 2024 · Take a look at different ways to search an array for a value. In this article, we would like to show you how to check if array contains any element of another array in JavaScript. asList(array) returns List<int[]>. The includes() method is case sensitive. May 30, 2011 · Write a boolean function that takes two unordered char arrays as parameters. isEqual(arr[0])); boolean match Jul 23, 2025 · There are many ways for checking whether the array contains any specific value or not, one of them is: Examples: Input: arr [] = {10, 30, 15, 17, 39, 13}, key = 17 Output: True Input: arr [] = {3, 2, 1, 7, 10, 13}, key = 20 Output: False Approach: Using in-built functions: In C language there is no in-built function for searching Aug 18, 2012 · It's because Arrays. If the element (key) is present in the array, return true; otherwise, return false. Aug 30, 2020 · You can iterate through both arrays and do a comparison, you can use Arrays. Jan 25, 2013 · How do I check if an ArrayList contains all of the objects in another ArrayList? I am looking (if it exists) for something along the lines of: //INCORRECT EXAMPLE: if Nov 16, 2022 · Java program for linear search algorithm. Example: Input: arr [] = [3, 5, 7, 2, 6, 10], key = 7 Output: Is 7 present in the array: true Input: arr [] = [-1, 1, 5, 8], key = -2 Output: Is -2 present in the array: false Approaches There are May 1, 2013 · Since sets cannot have duplicate elements while arrays can, combining both input arrays, converting it to a set, and comparing the set size and array length would tell you if they share any elements. Learn how to check for null elements in a Java array using loops, Stream API, and counting methods. binarySearch(), you can convert the array to a List with Arrays. allMatch(Predicate. You would have to manually write your own contains method that you can pass the array and the value to. If you use Java 8 or above, you can rely on the Stream API to do such thing: public static boolean containsItemFromArray(String inputString, String[] items) { // Convert the array of String items as a Stream // For each element of the Stream call inputString. indexOf() method. However, arrays are not equipped with a built-in method to check if an array contains a certain value. anyMatch(inputString::contains Jul 11, 2025 · Given an array of Integers and a key element. Alternatively you could use an array wrapper class such as ArrayList which does have a . Or you could convert to an ArrayList (see Arrays. stream(items). Conclusion Understanding and utilizing methods like contains(), containsAny(), and containsAll() is essential for effective collection manipulation and querying in Java. contains () Using a for-loop Collections Jan 31, 2023 · Output Original array is [8, 28, 41, 3, 29, 10] The sub array is [28, 10] The array 1 contains 28 The array 1 contains 10 Hence array 2 is a sub array of array 1 In this article, we explored how to check whether one array is a subset of another array by using Java programming language. The includes() method returns false if the value is not found. Jul 22, 2025 · “How to Check if an Array Contains a Value in Java” When working with arrays in Java, a common task is to ascertain whether a specific element exists within the array. Nov 17, 2023 · In Java, arrays are objects that store multiple variables of the same type. This is the simplest and complete solution for your if you want to check if ArrayList contains specific value such as String, Integer, Long or Double. contains(element) // If you have any match returns true, false otherwise return Arrays. There is an issue in part 2 and Dec 10, 2024 · In Java, the ArrayList contains () method is used to check if the specified element exists in an ArrayList or not. dt749lyoz0v1ertzkwlflczzrls1abrfy5t02ud