Introduction

In this tutorial, we'll be reading a file into a String in Java. There are a few ways we can read textual contents of a file.

Here's a list of all the classes and methods we'll go over:

• Files.lines()
• Files.readString()
• Files.readAllBytes()
• FileReader
• BufferedReader
• Scanner

Files.lines(

Introduction

Saving a String into files can be done in a few ways using Java. In this article, we'll show some common methods for writing a String into a file.

Here's a list of all the classes and methods we'll go over:

• Files.writeString()
• Files.write()
• FileWriter
• BufferedWriter
• PrintWriter

Files.

Introduction

The forEach() method is part of the Stream interface and is used to execute a specified operation, defined by a Consumer.

The Consumer interface represents any operation that takes an argument as input, and has no output. This sort of behavior is acceptable because the forEach() method is used

Introduction

Reading user input is the first step towards writing useful Java software. User input can come in many forms - mouse and keyboard interactions, a network request, command-line arguments, files that are updated with data relevant for a program's execution, etc.

We're going to focus on keyboard input via

Introduction

In this tutorial, we'll be converting an array into a more versatile ArrayList in Java.

• Arrays.asList()
• new ArrayList<>(Arrays.asList()) (Most popular and used approach)
• new ArrayList<>(List.of())
• Collections.addAll()
• Collectors.toList()
• Collectors.toCollection()
• Lists.newArrayList()

Arrays are simple and provide the basic