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import java.io.File;
class DirectoryTree {
public static void main(String args[]) {
File file = new File(args[0]);
if (!file.exists()) {
System.out.println(args[0] + " does not exist.");
return;
}
tree(args[0]);
}
public static void tree(String filename) {
File file = new File(filename);
if (!file.isDirectory()) {
System.out.println(filename);
return;
}
String files[] = file.list();
for (int i = 0; i < files.length; i++) {
tree(filename + File.separator + files[i]);
}
}
}
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