Java.io.FilePermission.implies() 方法

package com.codingdict;



import java.io.FilePermission;

import java.io.IOException;



public class FilePermissionDemo {



   public static void main(String[] args) throws IOException {

      FilePermission fp = null;

      FilePermission fp1 = null;

      FilePermission fp2 = null;

      FilePermission fp3 = null;

      boolean bool = false;



      try {



         // create new file permissions

         fp = new FilePermission("C://test.txt", "read");

         fp1 = new FilePermission("C://test.txt", "write");

         fp2 = new FilePermission("C://test1.txt", "read");

         fp3 = new FilePermission("C://test.txt", "read");



         // tests if implied by this object

         bool = fp.implies(fp1);



         // print

         System.out.println(bool);



         bool = fp.implies(fp2);

         System.out.println(bool);



         bool = fp.implies(fp3);

         System.out.print(bool);



      } catch(Exception ex) {



         // if an error occurs

         ex.printStackTrace();

      }

   }

}