Java Programming Tutorials

Java programming tutorials with many code examples!

Java 7 Walk File Tree

Java Files.walkFileTree() exmaple

In this post we’re going to show how use FileVisitor and Files from Java 7 NIO to walk directory tree and calculate sizes of its directories.

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Java 8 directory tree as stream

Problem:

How to get directory tree as stream in Java 8? Each release brings many JVM improvements, not only on language level. This post shows new Java NIO feature.

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Java File Metadata/Attributes

Problem:

How to read file metadata in Java? In this post we’ll show three ways to do that – using modern java.nio.file.Files API and legacy version using java.io.File.

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Java File Permissions

Problem:

How to read file permissions in Java? In this post we’ll show three ways to that, one for using java.io.File and two ways using fantastic Files from Java NIO.

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Java read binary file

Problem:

How to read binary file in Java? The simplest solution is to use FileInputStream with try-with-resources as this in this example.

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Java write binary file

Problem:

How to write binary file in Java? The simplest solution is to use FileOutputStream with try-with-resources and improved performance as show in the example.

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Java read text file

Problem:

How to read text file in Java? In this post we’re going to show the most straightforward way of reading text files using java.io.FileReader, thing that every Java developer needs to know!

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Java write text file

Problem:

How to write text file in Java? java.io have a number of useful classes for working with files, one of them is FileWriter that we’re going to show in this post. Read on!

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Java File list files

Problem:

How to list files in Java? In this post we’re going to show how to use File class to list files and do name filtering using FilenameFilter.

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