How to assign file content into a variable in Java
Most people will read the file content and assign to StringBuffer or String line by line. Here’s another trick that may interest you – how to assign whole file content…
How to check if a file is hidden in Java
A Java program to demonstrate the use of java.io.File isHidden() to check if a file is hidden. The isHidden() method is system dependent, on UNIX platform, a file is considered…
How to check if a file exists in Java
In Java, we can use Files.exists(path) to test whether a file exists. The path can be a file or a directory. It is better to combine with !Files.isDirectory(path) to ensure…
Java – Count number of lines in a file
This article shows few Java examples to get the total number of lines in a file. The steps are similar: (1) Open the file, (2) Read line by line, and…
How to get file size in Java
In Java, we can use Files.size(path) to get the size of a file in bytes. This example uses NIO Files.size(path) to print the size of an image file (140 kb).…
How to make a file read only in Java
A Java program to demonstrate the use of java.io.File setReadOnly() method to make a file read only. Since JDK 1.6, a new setWritable() method is provided to make a file…
How to get file creation date in Java
In Java (@since 1.7), we can use the NIO Files.readAttributes to get all the file metadata, including the file creation date. We also can use the same code to get…
File Transfer using SFTP in Java (JSch)
This article shows how to do file transfer from a remote server to the local system and vice versa, using SSH File Transfer Protocol (SFTP) in Java. This Java example…
How to move file to another directory in Java
This article shows, in Java, how to move a file to another directory in the same file drive or remote server: (1) Files.move – Move file in local system, (2)…
How to rename or move a file in Java
In Java, we can use the NIO Files.move(source, target) to rename or move a file. The Apache FileUtils.moveFile uses a "copy and delete" mechanism to rename or move a file.…