How do I check if a file exists in Java?
Using java.io.File:
File f = new File(filePathString);if(f.exists() && !f.isDirectory()) { // do something}
I would recommend using isFile() instead of exists(). Most of the time you are looking to check if the path points to a file not only that it exists. Remember that exists() will return true if your path points to a directory.
new File("path/to/file.txt").isFile();new File("C:/").exists() will return true but will not allow you to open and read from it as a file.
By using nio in Java SE 7,
import java.nio.file.*;Path path = Paths.get(filePathString);if (Files.exists(path)) { // file exist}if (Files.notExists(path)) { // file is not exist}If both exists and notExists return false, the existence of the file cannot be verified. (maybe no access right to this path)
You can check if path is a directory or regular file.
if (Files.isDirectory(path)) { // path is directory}if (Files.isRegularFile(path)) { // path is regular file}Please check this Java SE 7 tutorial.