Dec 9, 2024 · In Java, subarrays are the contiguous portion of an array. Extracting subarrays in Java is common when working with data that needs slicing or partitioning. Java does not have a direct method to create subarrays, we can extract subarrays using simple techniques like built-in methods or manual loops.

There is also a nice way with Java 8 Streams: int[] subArr = IntStream.range(startInclusive, endExclusive) .map(i -> src[i]) .toArray(); The benefit about this is, it can be useful for many different types of "src" array and helps to improve writing pipeline operations on the stream.

Jan 8, 2024 · The ArrayUtils class has the subarray() method, which allows us to get a subarray quickly: String[] result = ArrayUtils.subarray(LANGUAGES, 1, 4); assertArrayEquals(JVM_LANGUAGES, result); As we can see, it’s pretty straightforward to solve the problem using the subarray() method.

Feb 7, 2025 · Given an array arr [], the task is to generate all the possible subarrays of the given array. Examples: To generate a subarray, we need a starting index from the original array. For choosing the starting index, we can run a loop from [0 to n-1] and consider each i …

Constructs a new String by decoding the specified subarray of bytes using the specified charset.

Jan 15, 2024 · What is a Subarray? A subarray is a contiguous part of array, i.e., Subarray is an array that is inside another array. In general, for an array of size n, there are n* (n+1)/2 non-empty subarrays. For example, Consider the array [1, 2, 3, 4], …

Dec 8, 2021 · We can use the Java Stream, introduced in Java SE 8, to get a subarray from an array. The idea is to get a stream of elements between the specified range and then call the toArray() method to accumulate the stream elements into a new array.

Aug 3, 2010 · There is no way to declare a subarray in Java if you use built in arrays like byte[]. The reason is: The length of the array is stored with the data, not with the declaration of the reference to it. Hence a subarray which does not copy the data has no place where it …

Examples of this pattern abound in the Java library. For example, this pattern is used by the fill() methods and the copyOfRange() method in the Arrays class, and the arraycopy() method in the System class.

Mar 4, 2025 · This tutorial will demonstrate how to create a subarray from another array in Java. Learn various methods including Arrays.copyOfRange, using loops, and the Stream API. Gain practical insights and code examples to enhance your programming skills.