Thread: Writing a getColor() method

I am having trouble with a simple game. I have a game made with Blocks. The blocks are made as
Block(double x1Lc, double y1Lc, double w, double h, Color c)

They are then added to an ArrayList. The 0 block in the ArrayList is the player block. The other blocks are enemies or food. The enemies are blue and the food is red. If the character block touches an enemy then you lose the game. If the character block touches food then the food block is removed from the game.

With my code now. If you touch any block then you lose the game. What do I need to do to check if the blocks color is blue or red and then respond accordingly.

Here is my code for the for and if that works now but, ends if you touch any block.

// player loses if any two Blocks touch:
      for( int k=1; k<list.size(); k++ )
      {// see if Block 0 touches any other Block:
          {// if Block 0 hits Block k, player loses:
          if( list.get(0).hits( list.get(k) ) )
            state = "lose";
          }
      }

Originally Posted by KristopherP

What do I need to do....?

How about:

Originally Posted by KristopherP

check if the blocks color is blue or red and then respond accordingly

Seems (with the limited code provided.....) there should be a getColor and setColor method in your block class.
Then in your (posted) for loop something like:

for.........
if (food) { eat }
else if (enemy) {die}
else { touched unknown entity }

My main question is do I need to create a getColor method or can I use the getColor that is already available as part of Color.
If I can use the getColor already available that is getColor(String nm, int v)
If I use this would I attach my code as

if( list.get(0).hits( list.get(k).getColor(red) ) )

or am I working in the wrong direction?

I need a way to check the color of objects in an arrayList.

Provide your Block class with a getColor() method to return the lock's colour. Then inside a for loop call this method for each block in the list.

Originally Posted by KristopherP

I believe my previous post was in the wrong section.

We can move threads if they need moved. I merged your threads for the same question.

Thanks but, the problem is I do not know how to do a getColor() method. I do not know what the return type should be or what code I would use to get the color from one of my objects

Originally Posted by KristopherP

I do not know what the return type should be...

What type do you need to be able to compare to a color?

Originally Posted by KristopherP

...what code I would use to get the color from one of my objects

Is the color stored in a variable in your block object? Write a method that returns that value. You can search for samples with keywords "getters and setters".

Originally Posted by jps

What type do you need to be able to compare to a color?

I am not sure I do not know if it is an object or string

Originally Posted by jps

Is the color stored in a variable in your block object? Write a method that returns that value. You can search for samples with keywords "getters and setters".

It is , I need to return the variable from Color c Im just not sure how since Im confused on the method header and code. The text book has simple sample based examples for adding things or printing something to the screen.

Originally Posted by KristopherP

I am not sure I do not know if it is an object or string

In Java, a String is an object...
You ask the block to give it's color so you can determine if it is food or enemy. You are not sure what type to return from the method. You need to think about what you will compare the block's color to. If you will compare to a String, then your getColor method needs to return a String. If you will compare to a color object then your method should return a color object.

The thing is, this is not a right or wrong answer. This is a how you choose to do it... Some ways may be more beneficial in one program than a different program. It is up to you to determine what suits your needs.

Thanks for the input and links but, I am not getting it. I got my program to perform by using the locations in the arrayList since I know where each object is. I would still like to create a method to check the color though.

// player loses if any two Blocks touch:
      for( int k=1; k<list.size(); k++ )
      {// see if Block 0 touches any other Block:
          {// if Block 0 hits Block k, player loses:
          if( list.get(0).hits( list.get(k) ) && k <=10)  //losing objects are 1-10 so <=10
 
             state = "lose";
          }
            if( list.get(0).hits( list.get(k) ) && k <= list.size()) // food 11-15 so <= list
              list.remove(k);