Check If a File or Directory Exists in Java
1. Overview In this quick tutorial, we’re going to get familiar with different ways to check the existence of a file or directory. First, we’ll […]
Java
How to Read a Large File Efficiently with Java
1. Overview This tutorial will show how to read all the lines from a large file in Java in an efficient manner. This article is part of the […]
Getting a File’s Mime Type in Java
1. Overview In this tutorial, we’ll take a look at various strategies for getting MIME types of a file. We’ll look at ways to extend […]
Java – Delete a File
1. With Java – JDK 6 Let’s start with the standard Java 6 solution: As you can see – the file must exist before the delete […]
Java – Rename or Move a File
1. Overview In this quick tutorial, we’re going to look at renaming / moving a File in Java. We’ll first look into using the Files and Path classes from NIO, […]
Java – Write to File
1. Overview In this tutorial, we’ll explore different ways to write to a file using Java. We’ll make use of BufferedWriter, PrintWriter, FileOutputStream, DataOutputStream, RandomAccessFile, FileChannel, and the Java 7 Files utility class. We’ll also look […]
How to Read a File in Java
1. Overview In this tutorial, we’ll explore different ways to read from a File in Java. First, we’ll learn how to load a file from the […]
Java – Create a File
1. Overview In this quick tutorial, we’re going to learn how to create a new File in Java – first using the Files and Path classes from NIO, then […]
Java 8 Stream API Analogies in Kotlin
1. Introduction Java 8 introduced the concept of Streams to the collection hierarchy. These allow for some very powerful processing of data in a very readable way, […]
Spring Data Java 8 Support
1. Overview Spring Data now supports core Java 8 features – such as Optional, Stream API and CompletableFuture. In this quick article, we’ll go through some examples of how […]
Java 8 Streams peek() API
1. Introduction The Java Stream API introduces us to a powerful alternative for processing data. In this short tutorial, we’ll focus on peek(), an often misunderstood method. 2. […]
Summing Numbers with Java Streams
1. Introduction In this quick tutorial, we’ll examine various ways of calculating the sum of integers using the Stream API. For the sake of simplicity, we’ll use integers […]
Java 8 Predicate Chain
1. Overview In this quick tutorial, we’ll discuss different ways to chain Predicates in Java 8. 2. Basic Example First, let’s see how to use a simple Predicate to filter a List of […]
How to Use if/else Logic in Java 8 Streams
1. Overview In this tutorial, we’re going to demonstrate how to implement if/else logic with Java 8 Streams. As part of the tutorial, we’ll create a simple […]
Introduction to Spliterator in Java
1. Overview The Spliterator interface, introduced in Java 8, can be used for traversing and partitioning sequences. It’s a base utility for Streams, especially parallel ones. In this article, […]
Java 9 Stream API Improvements
1. Overview In this quick write-up, we are going to focus on the new interesting Stream API improvements coming in Java 9. 2. Stream Takewhile/Dropwhile […]
DistinctBy in the Java Stream API
1. Overview Searching for different elements in a list is one of the common tasks that we as programmers usually face. From Java 8 on […]
Primitive Type Streams in Java 8
1. Introduction The Stream API was one of the key features added in Java 8. Briefly, the API allows us to process collections and other […]
Java 8 and Infinite Streams
1. Overview In this article, we will be looking at a java.util.Stream API and we’ll see how we can use that construct to operate on an infinite […]
“Stream has already been operated upon or closed” Exception in Java
1. Overview In this brief article, we’re going to discuss a common Exception that we may encounter when working with the Stream class in Java 8: We’ll discover the […]
