Java : FileSystemException with Examples
FileSystemException (Java SE 21 & JDK 21) with Examples.
You will find code examples on most FileSystemException methods.
Summary
Thrown when a file system operation fails on one or two files. This class is the general class for file system exceptions.
final var file = Path.of("R:", "java-work", "aaa.txt");
System.out.println(file); // R:\java-work\aaa.txt
System.out.println(Files.notExists(file)); // true
try {
Files.delete(file);
} catch (FileSystemException e) {
System.out.println(e);
}
// Result
// ↓
//java.nio.file.NoSuchFileException: R:\java-work\aaa.txt
final var file = Path.of("R:", "java-work", "aaa.txt");
System.out.println(file); // R:\java-work\aaa.txt
Files.createFile(file);
System.out.println(Files.exists(file)); // true
try {
Files.createFile(file);
} catch (FileSystemException e) {
System.out.println(e);
}
// Result
// ↓
//java.nio.file.FileAlreadyExistsException: R:\java-work\aaa.txt
Constructors
FileSystemException (String file)
Constructs an instance of this class.
final var e = new FileSystemException("aaa.txt");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt
System.out.println(e.getFile()); // aaa.txt
FileSystemException (String file, String other, String reason)
Constructs an instance of this class.
final var e = new FileSystemException("aaa.txt", "bbb.txt", "Reason!");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt -> bbb.txt: Reason!
System.out.println(e.getFile()); // aaa.txt
System.out.println(e.getOtherFile()); // bbb.txt
System.out.println(e.getReason()); // Reason!
Methods
String getFile ()
Returns the file used to create this exception.
final var e = new FileSystemException("aaa.txt");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt
System.out.println(e.getFile()); // aaa.txt
String getMessage ()
Returns the detail message string.
final var e = new FileSystemException("aaa.txt", "bbb.txt", "Reason!");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt -> bbb.txt: Reason!
System.out.println(e.getMessage()); // aaa.txt -> bbb.txt: Reason!
String getOtherFile ()
Returns the other file used to create this exception.
final var e = new FileSystemException("aaa.txt", "bbb.txt", "Reason!");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt -> bbb.txt: Reason!
System.out.println(e.getOtherFile()); // bbb.txt
String getReason ()
Returns the string explaining why the file system operation failed.
final var e = new FileSystemException("aaa.txt", "bbb.txt", "Reason!");
System.out.println(e); // java.nio.file.FileSystemException: aaa.txt -> bbb.txt: Reason!
System.out.println(e.getReason()); // Reason!
Methods declared in Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
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