umut uzumcu

Hi,
Can anybody help me to sort this out please.

class..
{
Object p=pList.getCap(); //either this
String s=pList.getCap(); //or this

//here I need to cast the Object or String (any will do) into double
//to send it as an argument to coldDrinks(int, double) method
sDB.coldDrinks(++coldDrinkNo,softDrinkPrice);
}


other class
{
Object/String getCap()
{
}
}


other class
{
coldDrinks(int, double)
{..}
}


Thanks in advance.

How can I put

unique_number(key) , name(value), surname(value), addres(value)

those information into the TreeMap? TreeMap takes 1 key and 1 value at a time, what is the way to put more value in the map for a key?

hi, here is my code

RecordClass rc has data No,name, color,owner
When i put the data into the TreeMap key is saved ok but the value(rc) not.

but if i just wanna save the No and the name in the TreeMap, thats working fine. eg. vdb.put(rc.getNo(),rc.getName());

Bur i need to save 1 key in the map and that key has to hold 3 values


What can be the problem?

public class DB
{
Map vdb=new TreeMap();
public void store(RecordClass rc)
{

vdb.put(rc.getNo(),rc);

System.out.println(vdb);
}
}

Garrett Rowe,


Yes i have to use validation methods as well, but here is the other problem, my validation methods shouldnt have return value, so how
the method will know was it valid or not if there is nothing turning
back to method? Validation method will be used with methods in the same class as well as from the other clasess.
Is anybody know how can i get the value from a method without returning it?

public static void validateDate(String date) throws InvalidRecord
{
int date=0;

try{
date=Integer.parseInt(input);

}catch(Exception e)
{
throw new InvalidRecord("Date must be numeric");

}
}

public class InvalidRecord extends Exception
{
InvalidRecord(String invalid)
{
super(invalid);
}
}

For example on the code above I have to have the class called InvalidRecord and specify the exact error for all methods and different errors. and my code should continue after throwing the exception, it shouldnt terminate according to my project.

I dont know why, its not working in my code, the printStackTrace();

gives me error "cannot resolve symbol".

Joanne Neal,
yes your code is working continuously but it doesnt give any exception error, so its working like a plain while loop. I need to throw an exception and give user an error message like "date should be numeric" and allow them to try again.

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

String input=JOptionPane.showInputDialog("\n\tEnter the date of the registration..");


int date=0;

try{
date=Integer.parseInt(input);

}catch(NumberFormatException nfe)
{
throw new InvalidRecord("Date must be numeric");
}


VehicleRecord vr=new VehicleRecord("bnh",date,"ford","escord","colour");

}


for example here, the exception is thrown is user enter non numeric data, and then program stops working, how can i continue coding? for exmaple how can i make user to enter the data again?

Hi all,

Is it possible that the program coninues running after the Exception thrown?

I m looking for all different possibilities,
Not less or more than 5 numbers.
no repetition of the same number in the group. (1,2,1,3,5) is not valid
order doesnt make difference (1,2,3,4,5) and (5,4,3,2,1) are same


Pablo Muller
The formula you send
C(n,m)=n!/(m!(n-m)!)
I think this is what i was looking for.


thank you all

Hi,
Does anybody know the formula to claculate the posibility

ex. I have 10 numbers and i wanna choose 5 numbers randomly.
What is the formula to find out how many different group of 5 numbers I can choose.

class array { [fbr - solution removed] }

is that the solution you were looking for? Thats what i could do check it out.
[ January 30, 2007: Message edited by: Fred Rosenberger ]

withdraw=Double.parseDouble(JOptionPane.showInputDialog("Please enter the amount you want to withdraw )"));

here I can get the entered double withdraw amount but the problem is I dont know how can I prevent the user to enter letters or punctuations(anything else than number.)?

So for example
There is two Account types(Student and Platinum) which they both can use the methods Withdraw and Deposit. But the Student account cant Overdraft. And they both Interest paying type of accounts.

In that situation is my code right?

public abstract class Account { public withdraw() { //body } public deposit() { //body } public abstract overdraft(); } public interface Interest { public void setIntereset(double interest); } public StudentAccount extends Account implements Interest { //body } public PlatinumAccount extends Account implements Interest { //body public void overdraft() { //body } }
[ January 19, 2007: Message edited by: umut uzumcu ]

Thank you Adam that was helpful.

So what about interface, its seems very similar to abstract