Created
July 21, 2010 05:30
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Windows nul drive test
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import java.io.File; | |
import java.io.FileOutputStream; | |
import java.io.IOException; | |
/* | |
* Author: Ashwin Jayaprakash / Date: Jul 20, 2010 / Time: 10:00:22 PM / Contact: http://www.ashwinjayaprakash.com | |
*/ | |
public class DevNullTest { | |
public static void main(String[] args) throws IOException { | |
File f = new File("nul:"); | |
System.out.println(f + " write: " + f.canWrite() + ", read: " + f.canRead() | |
+ ", exec: " + f.canExecute() + ", length: " + f.length() | |
+ ", dirs: " + f.list() + ", mkdirs: " + f.mkdirs() | |
+ ", path: " + f.getAbsolutePath()); | |
System.out.println("----------"); | |
File f2 = new File("nul:test.log"); | |
FileOutputStream fos = new FileOutputStream(f2); | |
for (int i = 0; i < 1024; i++) { | |
fos.write(1); | |
} | |
fos.close(); | |
System.out.println( | |
"Wrote to: " + f2 + " write: " + f2.canWrite() + ", read: " + f2.canRead() | |
+ ", exec: " + f2.canExecute() + ", length: " + f2.length() | |
+ ", dirs: " + f2.list() + ", mkdirs: " + f2.mkdirs() | |
+ ", path: " + f2.getAbsolutePath()); | |
System.out.println("----------"); | |
File f3 = new File(f, "another.log"); | |
try { | |
boolean b = f3.createNewFile(); | |
System.out.println(f3); | |
} | |
catch (IOException e) { | |
System.err.println("createNewFile() failed on: " + f3); | |
e.printStackTrace(); | |
} | |
System.out.println("----------"); | |
File f4 = new File(f, "again.log"); | |
System.out.println(f4 + " write: " + f4.canWrite() + ", read: " + f4.canRead() | |
+ ", exec: " + f4.canExecute() + ", length: " + f4.length() | |
+ ", dirs: " + f4.list() + ", mkdirs: " + f4.mkdirs() | |
+ ", path: " + f4.getAbsolutePath()); | |
} | |
} |
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nul: write: true, read: true, exec: true, length: 0, dirs: null, mkdirs: true, path: D:\Dump\nul: | |
---------- | |
Wrote to: nul:test.log write: true, read: true, exec: true, length: 0, dirs: null, mkdirs: true, path: D:\Dump\nul:test.log | |
---------- | |
createNewFile() failed on: nul:\another.log | |
java.io.IOException: The filename, directory name, or volume label syntax is incorrect | |
at java.io.WinNTFileSystem.createFileExclusively(Native Method) | |
at java.io.File.createNewFile(File.java:883) | |
at com.athi.bala.test.DevNullTest.main(DevNullTest.java:36) | |
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | |
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | |
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | |
at java.lang.reflect.Method.invoke(Method.java:597) | |
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:110) | |
---------- | |
nul:\again.log write: false, read: false, exec: false, length: 0, dirs: null, mkdirs: false, path: D:\Dump\nul:\again.log |
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