Many java developers might have came across the code where the developer need to use file separator for the file path or directory path. Many of them are using “/” or “\” depending upon the operating system. Using the forward or backward slash is not a good practice while coding in the java, because your code may…
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Below Java Code shows how to read UTF-8 data from file or read UTF-8 encoded data from a text file-

Below Java Code shows how to write UTF-8 data into a file using Java –

Below java code shows how to get the size of a file in bytes –

Below java code show how to get the list of file system root –  

You can get current working directory using System.getProperty(“user.dir”) function. Here current working directory means the root folder of your current Java project. Below java code shows how to get current working directory of user –   References: Oracle Java Docs for System Properties

Below Java code shows how to check if a file exists –

Below java code shows how to create directories recursively –

Below java code shows how to list files and sub-directories in a directory –  

Below java code shows how to load a file into Byte Array and print the Byte Array –  

Usually when you generate an exception in a Java program, you just print the exception to standard output using below code statement System.out.println(“Got an Exception: ” + e.getMessage()); But this is not what you want. Sometime you want to write Exception’s PrintStackTrace to a file and below Java program shows you how to write Exception’s…
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Below java code shows how to remove line from file

Below java code shows how to rename a file or change a file name

Below java code shows how to read data from InputStream to a String –

Below java code shows how to get list of files using FileFilter class. FileFilter is an abstract class used by JFileChooser for filtering the set of files shown to the user. A FileFilter can be set on a JFileChooser to keep unwanted files from appearing in the directory listing.   Reference: Java Docs