dirfile.java

java课件 java课件 java课件 java课件

import java.io.*;
import java.util.*;
public class DirFile{
  public static void prt(String str){
     System.out.println(str);
  }
public static void main(String args[]){
    if(args.length==0){
       prt("Usage:java DirFile filename.");
       System.exit(1);
    }
    
   File f=new File(args[0]);
    if(f.exists()){
      prt("File Name:"+f.getName());
      prt("Directory:"+f.getAbsolutePath());
      prt("Can Read:"+f.canRead());
      prt("Can Write:"+f.canWrite());
      prt("Last Modified:"+new Date(f.lastModified()));
      prt("Length:"+f.length()+" Byte(s).");
    }else{ 
      prt("The file "+args[0]+" does not exists.");
    }
  }
}