[JAVA100 example]005, hash table (Hashtable), and enumerator

public class Roleright


{


private static Hashtable rightlist = new Hashtable ();


/**


*<br> Method Description: Initializing Data


*<br> input Parameters:


*<br> return type:


*/


public void init ()


{


string[] accrolelist = {"Admin", "satrap", "manager", "User", "Guest"};


string[] rightcodelist = {"10001", "10011", "10021", "20011", "24011"};


for (int i=0;i<accrolelist.length;i++)


　　 {


rightlist.put (Accrolelist[i],rightcodelist[i]);


　　 }


}


/**


*<br> Method Description: Get the role permission code


*<br> input parameter: String accrole role name


*<br> return type: String permission code


*/


public String GetRight (string accrole)


{


if (Rightlist.containskey (accrole))


Return (String) rightlist.get (accrole);


Else


return null;


}


/**


*<br> Method Description: Add roles and code information


*<br> input parameter: String accrole role name


*<br> input parameter: String rightcode role Permission Code


*<br> return type: void (none)


*/


public void Insert (String accrole,string rightcode)


{


Rightlist.put (Accrole,rightcode);


}


/**


*<br> Method Description: Remove role Permissions


*<br> input parameter: String accrole role name


*<br> return type: void (none)


*/


public void Delete (String accrole)


{


if (Rightlist.containskey (accrole))


Rightlist.remove (Accrole);


}


/**


*<br> Method Description: Modify the role permission code


*<br> input parameter: String accrole role name


*<br> input parameter: String rightcode role Permission Code


*<br> return type: void (none)


*/


public void Update (String accrole,string rightcode)


{


//this.delete (Accrole);


This.insert (Accrole,rightcode);


}


/**


*<br> Method Description: Print the roles and code corresponding tables in the hash table


*<br> Input parameters: no


*<br> return type: No


*/


public void print ()


{


Enumeration Rlkey = Rightlist.keys ();


while (rlkey.hasmoreelements ())


　 {


String accrole = Rlkey.nextelement (). toString ();


print (accrole+ "=" +this.getright (accrole));


　 }


}


/**


*<br> Method Description: Print information (overload)


*<br> Input parameters: Object Opara printed information content


*<br> return type: No


*/


public void print (Object Opara)


{


System.out.println (Opara);


}


/**


*<br> Method Description: Main method,


*<br> input Parameters:


*<br> return type:


*/


public static void Main (string[] args)


{


roleright RR = new Roleright ();


Rr.init ();


Rr.print ();


rr.print ("___________________________");


Rr.insert ("Presider", "10110");


Rr.print ();


rr.print ("___________________________");


rr.update ("Presider", "10100");


Rr.print ();


rr.print ("___________________________");


rr.delete ("Presider");


Rr.print ();


}


}//end:) ~