java8 Archives - onlinetutorialspoint

Java8 Optional class, usage and advantages ?

chandrashekhar — Tue, 14 Feb 2023 04:41:53 +0000

The Optional class was introduced in Java 8 as a way to handle the null values in a cleaner and more elegant way. The Optional class is a container object that can either contain a non-null value or be empty. Java8 Optional Class: The Optional class in Java is a container class that is designed

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How to handle Null Values in Java8 Streams?

chandrashekhar — Mon, 13 Feb 2023 12:38:31 +0000

Java Streams is a powerful API for processing data and performing complex operations in an efficient and elegant manner. However, one of the challenges when working with streams is how to handle null values. In this article, we will explore different ways to handle null values when working with Java streams. Handling Null values in

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Java8 map() vs reduce() ?

chandrashekhar — Mon, 13 Feb 2023 05:17:00 +0000

The Java Stream API provides several aggregate operations to process data in a functional way. Two of these operations, map() and reduce(), are often used in combination to perform complex transformations on collections of data. While they are similar in some ways, they are also different and serve different purposes, so it's important to understand

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Java8 map() vs flatMap() ?

chandrashekhar — Sun, 12 Feb 2023 12:06:08 +0000

Java 8 introduced streams as a way to process data in a functional and efficient manner. One of the key concepts of streams is the ability to perform aggregate operations, such as filtering, mapping, and reducing. In this article, we will focus on two of these operations: map() and flatMap(). Java8 map() vs flatMap(): The

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How to Convert Iterable to Stream Java 8

chandrashekhar — Tue, 05 May 2020 09:47:45 +0000

Now there is a frequent scenario to convert Iterable to Stream as we are dealing with JPA repositories. Most of the JPA findByXXX methods return Iterable type. Convert Iterable to Stream Java 8: Stream API provides a lot of flexibility to access the Java collections, for example, filter based on specific conditions, grouping of items,

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How to Sort an Array in Parallel in Java 8

chandrashekhar — Tue, 08 Oct 2019 08:11:28 +0000

The current sorting implementations provided by the Java Collection Framework, i.e. Collections.sort and Arrays.sort sequentially performs the sorting. In this tutorial, we will see how to sort an array in parallel. How to Sort an Array in Parallel in Java 8: Java 7 has been introduced fork/join parallelism framework for lightweight data processing. By taking

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Java 8 How to get common elements from two lists

chandrashekhar — Sat, 28 Sep 2019 15:35:25 +0000

Here we will see how to get common elements from two lists we can even say the intersection of two lists using different ways. Example: Input: a = {"1","2","3","4","5"} b = {"1","2","3"} Result: 1,2,3 Get Common Elements from two Lists: retainAll() method from the Collection interface is used to remove the common elements from two

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Java – How to Convert InputStream to String

chandrashekhar — Fri, 13 Sep 2019 04:02:07 +0000

In this tutorial, we will see different ways to convert InputStream to String in java. How to Convert InputStream to String: Converting InputStream to String is a very common use case while reading data from files. In Java, there are different ways to convert InputStream to String using different libraries. Let's look into the possibilities.

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How Java 8 Stream generate random String and Numbers

chandrashekhar — Fri, 13 Sep 2019 01:17:31 +0000

In this tutorial, we will see how Java 8 Stream Generate Random String and Numbers. Stream generate random String: Stream provides generate method - It returns an infinite sequential unordered stream where each element is generated by the given supplier. Syntax: static Stream generate(Supplier s) The random method takes Supplier as a parameter, generates

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Java 8 Getting Min and Max values from a Stream

chandrashekhar — Thu, 12 Sep 2019 16:00:18 +0000

Getting Min and Max values from a Stream in Java 8 is not a big deal, here we will see how it can be done. Getting Min and Max values from a Stream: Here are our use cases to get min and max values from the stream. Usecases: Usecase // Numbers Collection elements = Arrays.asList(1,2,3,4,5);

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