Demonstrates the use of the File class to create directories and manipulate files
// : c12:MakeDirectories.java
// Demonstrates the use of the File class to
// create directories and manipulate files.
// {Args: MakeDirectoriesTest}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.io.File;
public class MakeDirectories {
private static void usage() {
System.err.println("Usage:MakeDirectories path1 ...\n"
+ "Creates each path\n"
+ "Usage:MakeDirectories -d path1 ...\n"
+ "Deletes each path\n"
+ "Usage:MakeDirectories -r path1 path2\n"
+ "Renames from path1 to path2");
System.exit(1);
}
private static void fileData(File f) {
System.out.println("Absolute path: " + f.getAbsolutePath()
+ "\n Can read: " + f.canRead() + "\n Can write: "
+ f.canWrite() + "\n getName: " + f.getName()
+ "\n getParent: " + f.getParent() + "\n getPath: "
+ f.getPath() + "\n length: " + f.length()
+ "\n lastModified: " + f.lastModified());
if (f.isFile())
System.out.println("It's a file");
else if (f.isDirectory())
System.out.println("It's a directory");
}
public static void main(String[] args) {
if (args.length < 1)
usage();
if (args[0].equals("-r")) {
if (args.length != 3)
usage();
File old = new File(args[1]), rname = new File(args[2]);
old.renameTo(rname);
fileData(old);
fileData(rname);
return; // Exit main
}
int count = 0;
boolean del = false;
if (args[0].equals("-d")) {
count++;
del = true;
}
count--;
while (++count < args.length) {
File f = new File(args[count]);
if (f.exists()) {
System.out.println(f + " exists");
if (del) {
System.out.println("deleting..." + f);
f.delete();
}
} else { // Doesn't exist
if (!del) {
f.mkdirs();
System.out.println("created " + f);
}
}
fileData(f);
}
}
} ///:~
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