帮我注释一下这段java代码，我菜鸟一个，谢谢了

// Lec13: MakeDirectories.java
import java.io.*;
import java.util.*;//这个是JAVA中这段程序要用到的包文件。

public class MakeDirectories {
private static void usage() {
System.out.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."); //这个是输出信息。
System.exit(1); //退出程序。
}

private static void fileData(File f) {
System.out.println("Absolute Path: " + f.getAbsolutePath() //获得路径。
+ "\n Can Read: " + f.canRead() + "\n Can write: " //文件的可读写性
+ f.canWrite() + "\n getName: " + f.getName()
+ "\n getParent: " + f.getParent() + "\n getPath: "
+ f.getPath() + "\n length: &qu