To create a Directory in Java, just use the mkdir or mkdirs methods of the Java File class. you can see in below example, both methods (mkdir and mkdirs) return a boolean value indicating whether the directories were created successfully. You'll want to include your own logic in the if/then tests that are shown after the mkdir and mkdirs method calls.
To create a directory in Java, uses the following code:
Method-1 : Using Standard Java IO package – java.io.File
Method-2 : For JDK 7, try Java NIO package – java.nio.file.Paths and java.nio.file.Files
Let see the complete examples :
If a directory is failing to create, IOException will be thrown, for example
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To create a directory in Java, uses the following code:
Method-1 : Using Standard Java IO package – java.io.File
- If you require to create single folder or directory in java application, refer the below java code :
new File("C:\\file1").mkdir();
- if you require to create multiple folder in nested order. For example here we are creating file2 folder inside that we are creating sub directory Sub1 and Sub2.
new File("C:\\file2\\Sub1\\Sub2").mkdirs()
Method-2 : For JDK 7, try Java NIO package – java.nio.file.Paths and java.nio.file.Files
Path path = Paths.get("C:\\File1");
Files.createDirectories(path);
Let see the complete examples :
Java IO Example
A classic Java IO directory example, check if directory exists, if no, then create it.import java.io.File;
public class CreateDirectoryExample {
public static void main(String[] args) {
File file = new File("C:\\File1");
if (!file.exists()) {
if (file.mkdir()) {
System.out.println("Directory is created!");
} else {
System.out.println("Failed to create directory!");
}
}
File files = new File("C:\\File2\\Sub2\\Sub-Sub2");
if (!files.exists()) {
if (files.mkdirs()) {
System.out.println("Multiple directories are created!");
} else {
System.out.println("Failed to create multiple directories!");
}
}
}
}
Java NIO Example
Java NIO classes are added in JDK 7.import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
public class CreateDirectoryExample {
public static void main(String[] args) {
Path path = Paths.get("C:\\Directory2\\Sub2\\Sub-Sub2");
//if directory exists?
if (!Files.exists(path)) {
try {
Files.createDirectories(path);
} catch (IOException e) {
//fail to create directory
e.printStackTrace();
}
}
}
}
If a directory is failing to create, IOException will be thrown, for example
java.nio.file.AccessDeniedException: /directory-name
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:384)
at java.nio.file.Files.createDirectory(Files.java:674)
at java.nio.file.Files.createAndCheckIsDirectory(Files.java:781)
at java.nio.file.Files.createDirectories(Files.java:767)
Thank you for reading this article, and if you have any problem, have a another better useful solution about this article, please write message in the comment section.