How to create an array of objects

[redmaverick]

Hi Guys,

This is the problem I have


Partier lowie= new Partier(Buff, full, empty, mutex);
Partier duey= new Partier(Buff, full, empty, mutex);
Partier huey = new Partier(Buff, full, empty, mutex);


if I run lowie.start();
duey.start();
huey.start();

then I have no issues....

but I want to create a list of arrays such as lowie[0] lowie[1] lowie[2]

so that I can execute lowie[0].start();
lowie[1].start();
lowie[2].start();

how to declare an array of objects?
I know that I can't by declaring Partier lowie[] = new Partier[2];

thanks in advance.....I am not strong in the fundamentals..

[Fubarable]

Please have a look here: Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics)

It's the best way to get stronger on the fundamentals.

Luck.

[redmaverick]

thanks for the link.....but it doesn't say how to solve my problem of creating an array of objects

[Fubarable]

Well, you create an array just as you said not to:

I know that I can't by declaring Partier lowie[] = new Partier[2];

[redmaverick]

I am getting this error

Exception in thread "main" java.lang.NullPointerException
        at Pledge_Party.main(Pledge_Party.java:153)

when I tried declaring it that way.

[Fubarable]

That's probably not due to declaring it like this but is likely because you haven't initialized the array items before using them.

Let's see your code. That'll probably clear this up.

[redmaverick]

I tried declaring it this way after picking up this code from a website

for(int i=0;i<4;i++)
           {
             rer[i] = new Partier(Buff, full, empty, mutex);
           }

I am able to run the program without any problems....

thanks!

[Fubarable]

Cool. Glad you have it working. Just one little bit of advice: if possible, let the array itself dictate the upper bound of the for loop:

for (int i = 0; i < rer.length; i++) 
{
  rer[i] = new Partier(Buff, full, empty, mutex);
}

This will help prevent array index out of bounds errors.