You can find the first non-repeated character in a string using Java 8 Streams by counting occurrences and filtering the first unique character. Output: Alternative: Using Traditional Map Approach (Better Performance)

Output: Alternative: Using Traditional Set Approach (Better Performance)

Output: Alternative: Using Set for Better Performance

Output

Output: Explanation: Alternative: Handling Multiple Max Elements If multiple elements have the same highest frequency, return all: Output:

Output:

You can reverse each word in a string using Java 8 Streams by splitting the string into words, reversing each word, and then joining them back. Output:

You can find common elements between two arrays using Java 8 Streams by filtering elements present in both arrays. Below are two approaches: Approach 1: Using filter() and contains() (For Small Arrays) This approach works well when the second array is small since contains() runs in O(n) time. Output: Approach 2: Using Set for Better…

Alternative: Using Comparator.comparing() A more concise way: