Java Files in W3Schools

Overview

• File Handling is crucial for application development.
• Java provides methods to create, read, update, and delete files.

Java File Handling

• File class is part of java.io package, enabling file operations.
• To use the File class:
  • Create a File object specifying the filename or directory.

Example

Key Methods of File Class

• canRead(): Checks if file is readable (returns Boolean)
• canWrite(): Checks if file is writable (returns Boolean)
• createNewFile(): Creates an empty file (returns Boolean)
• delete(): Deletes a file (returns Boolean)
• exists(): Checks if the file exists (returns Boolean)
• getName(): Returns file name (returns String)
• getAbsolutePath(): Returns file's absolute path (returns String)
• length(): Returns file size in bytes (returns Long)
• list(): Returns files in directory as an array (returns String[])
• mkdir(): Creates a directory (returns Boolean)

Learn More

• Next chapters cover how to create, write, read, and delete files.
  • Create/Write Files
  • Read Files
  • Delete Files