Stream API Coding Questions - Level II

Practice 22 Stream API Coding Questions - Level II interview questions with detailed answers. Part of the Core Java track on Java Interview Hub.

• Given a list of integers, find out all the even numbers that exist in the list using Stream functions?
• Given a list of integers, find out all the numbers starting with 1 using Stream functions?
• How to find duplicate elements in a given integers list in java using Stream functions?
• Given the list of integers, find the first element of the list using Stream functions?
• Given a list of integers, find the total number of elements present in the list using Stream functions?
• Given a list of integers, find the maximum value element present in it using Stream functions?
• Given a String, find the first non-repeated character in it using Stream functions?
• Given a String, find the first repeated character in it using Stream functions?
• Given a list of integers, sort all the values present in it using Stream functions?
• Given a list of integers, sort all the values present in it in descending order using Stream functions?
• Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.
• How will you get the current date and time using Java 8 Date and Time API?
• Write a Java 8 program to concatenate two Streams?
• Java 8 program to perform cube on list elements and filter numbers greater than 50.
• Write a Java 8 program to sort an array and then convert the sorted array into Stream?
• How to use map to convert object into Uppercase in Java 8?
• How to convert a List of objects into a Map by considering duplicated keys and store them in sorted order?
• How to count each element/word from the String ArrayList in Java8?
• How to find only duplicate elements with its count from the String ArrayList in Java8?
• How to check if list is empty in Java 8 using Optional, if not null iterate through the list and print the object?
• Write a Program to find the Maximum element in an array?
• Write a program to print the count of each character in a String?