ArrayList and Generics

[redashley]

Hello Everyone.
I have some question to ask you I have read your info and have read a book call Big Java and I still lost.
1. I have a Class called BankStatement and when I'm create a Arraylist.
Arraylist <BankStatemen t> bank = New Arraylist <BankStatemen t>
is <BankStatemen t> the Class BankStatement.
2. How do I inunate BankStatement can can if be null, and how do I do this and where do I do this.
3. How do I add data to bank and where do I add it at.
I think it

BankStatement bank = new BankStatement("A1") //is A1 the Index number/
bank.addBid("123Aw");
bank.addFname("Red");
...
arlist.add(bank);

4. can you have more than I arraylist in a Class. ie project.

thanks
Red

[r035198x]

Hello Everyone.
I have some question to ask you I have read your info and have read a book call Big Java and I still lost.
1. I have a Class called BankStatement and when I'm create a Arraylist.
Arraylist <BankStatemen t> bank = New Arraylist <BankStatemen t>
is <BankStatemen t> the Class BankStatement.
2. How do I inunate BankStatement can can if be null, and how do I do this and where do I do this.
3. How do I add data to bank and where do I add it at.
I think it

BankStatement bank = new BankStatement("A1") //is A1 the Index number/
bank.addBid("123Aw");
bank.addFname("Red");
...
arlist.add(bank);

4. can you have more than I arraylist in a Class. ie project.

thanks
Red

Changed thread title.

Not all that you have asked is very clear. bank is a BankStatement object, so to set any data in it you need to use the methods that you have defined in the BankStatement class.
The arraylist declaration is actually supposed to be

 
ArrayList<BankStatement> list = new ArrayList<BankStatement>();

[redashley]

So if I have a class BankStatement

class BankStatement{
String BankId;
String Fname;
String Lname;
}
	/*
	 * Mutator Methods if any
	 */
	/*
	 * accessors make info available if any.
	 */
//create my arraylist.
public class BankStatement{
ArrayList<BankStatement> list = new ArrayList<BankStatement>();
}

Is that right?

Red.

[r035198x]

So if I have a class BankStatement

class BankStatement{
String BankId;
String Fname;
String Lname;
}
	/*
	 * Mutator Methods if any
	 */
	/*
	 * accessors make info available if any.
	 */
//create my arraylist.
public class BankStatement{
ArrayList<BankStatement> list = new ArrayList<BankStatement>();
}

Is that right?

Red.

You have two BankStatement classes there! Also remember in java, all code must be inside some class. If you get time go through this.

[redashley]

Opps...

class BankInfo{
String BankId;
String Fname;
String Lname;
}
	/*
	 * Mutator Methods if any
	 */
	/*
	 * accessors make info available if any.
	 */
//create my arraylist.
public class BankStatement{
ArrayList<BankInfo> list = new ArrayList<BankInfo>();
}

So to add object into the Arraylist I would do somthing like this.
BankInfo temp = new Bankinfo("B1)//this being the index postion.
temp.addBankId( "BC-123");
temp.addFname(" Red");
temp.addLname(" Ashley");
....
arlist.add(temp ;

is that right.
if so where do I place this info at.
Red

[r035198x]

Opps...

class BankInfo{
String BankId;
String Fname;
String Lname;
}
	/*
	 * Mutator Methods if any
	 */
	/*
	 * accessors make info available if any.
	 */
//create my arraylist.
public class BankStatement{
ArrayList<BankInfo> list = new ArrayList<BankInfo>();
}

So to add object into the Arraylist I would do somthing like this.
BankInfo temp = new Bankinfo("B1)//this being the index postion.
temp.addBankId( "BC-123");
temp.addFname(" Red");
temp.addLname(" Ashley");
....
arlist.add(temp ;

is that right.
if so where do I place this info at.
Red

I don't understand what you mean by

"//this being the index postion"

but to add to the ArrayList you do

 arlist.add(temp);

where arlist is the ArrayList of BankInfo and temp is a BankInfo object.

[redashley]

I don't understand what you mean by

"//this being the index postion"

but to add to the ArrayList you do

 arlist.add(temp);

where arlist is the ArrayList of BankInfo and temp is a BankInfo object.

this being the index postion I mean this is where the object will be stored in the Arraylist.

red

[r035198x]

this being the index postion I mean this is where the object will be stored in the Arraylist.

red

You are mistaken then. The add method is the one that adds to the arraylist. Have a look at the docs for ArrayList.

[redashley]

Thanks r035198x for the help. I know there well be more Question for you.