[SOLVED] Please help with java

[SKYLINEGTR]

shasduybhkvk yuvk yu

[Fubarable]

You need to look up and use enums. Check the Sun tutorials for info on this.

[SKYLINEGTR]

enums?? never even heard of these but ok ill take a look

thx

[Eranga]

There is a nice tutorial on Suns tutorial about enum in Java.

Java enum

[SKYLINEGTR]

ok iv been reading some of them tutorials but im still stuck
I need to create an integer field to hold the directions and with enums where can i state its an int? And where do i stick the constants 1,2,3,4?? Well apparently i 'can' use these...but i guess i dont need to if i dont?

It cant just be this can it

private enum Direction { UP, DOWN, LEFT, RIGHT }

[Fubarable]

Enums can hold and return ints or Strings or anything else just like a regular class. Look at the tutorial and it will show you how to do this.

[Eranga]

Yes enums can holds and return any primitive data type. Seems to me you don't have clearly read about enums.

[SKYLINEGTR]

indeed actually its only my 2nd month leanring java and iv never heard or read about enums before

If I write a possible solution can someone atleast say if its right or wrong please..im going to work on it now..

[Eranga]

Now you have create an enum Direction, and it's hold all directions you want.

Define an object of Direction and in simple way, in a switch-case block refer the direction you want.

public class DirectionUse {
     Direction direction;

     public DirectionUse(Direction direction) {
         this.direction = direction;
     }

     public void EnumUsingHere() {
         switch(direction) {
              case UP:
                    System.out.println("Up");
                    break;
              // all other cases as you need
         }
     }

     public static void main(String[] args) {
         DirectionUse use = new DirectionUse(Direction.UP);
         use.EnumUsingHere()
     }
}

[laxminarayana]

hello hai i want help to develop java coding

[SKYLINEGTR]

Thx for your help guys, i managed to complete that class now but i just need a question answering on the next part now

OK, say. I had a class called Cars and now another called Person.
Im going to create a field which contains an array of car objects, but initially it wont contain any cars

So for this do i just have something like the following field and declare later in the constructor about the CAR Objects?:

private double[] cars;


Thanks

[SKYLINEGTR]

actually forget that...that isnt the problem tbh
iv declared the following field (array)

private double[] cars;

now in the constructor im trying to initialise the array so it can hold 6 objects from the 'Cars' class itself....im not sure what else to enter in the code..this is what i have...

Cars = new double[6];

but this doesnt refer to the cars class so how do i do that?? :S

[Eranga]

An array is a collection of same data type.

private double[] cars;

This is an array of double values, data type is double. If you want to hold an object, array must holds relevant object types. You have to do something like this.

Cars[] car_array = new Cars[6];

Until you added any object, null objects are contain.

[SKYLINEGTR]

ah so thats how you link it...thx!

[Eranga]

Did you solve the question? What you mean by link?

[SKYLINEGTR]

dont worry that part is solved

[Eranga]

So it' better if you can mark the thread solved.

[SKYLINEGTR]

ok calm down

[Eranga]

ok calm down

I'm always. Want to make our community is the best place.

[SKYLINEGTR]

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