Drawing/Changing health not working.

Newbie & Debugging Questions
#1

Hi evryone!

I have a problem 1 week now and I don’t know what I am doing wrong. I’m making a small pixel game with some help. I was making a health-system, but I made the code and it just didnt worked. You can see why on the picture:


http://img819.imageshack.us/img819/5408/9kb2.png

QWE has 15 HP and the healthbar is empty,
ZA has 16 HP and the healthbar is full.

the code I used:

if (HUDSHOWN >= 2){
			for(int i = 0; i <= modifier*2; i++){
				int manaColour = -1;
				int healthColour = -1;
				int mMax = 0;
				int hMax = 0;
				
				if(mana != 0 && maxMana != 0) mMax = mana/maxMana*16;
				if(health != 0 && maxHealth != 0) hMax = health/maxHealth*16;
				
				if(i > 0 && i < modifier*2){
					if(i - 1 < hMax){
						healthColour = 500;
					} 
					if(i - 1 < mMax){
						manaColour = 115;
					} 
				} else if(i == 0 || i == modifier*2){
					healthColour = 0;
					manaColour = 0;
				}
				
				int healthBarColour= Colours.get(-1, healthColour, manaColour, 000);
				screen.render(xOffset-2 + i, yOffset - 6, 1 + 27 * 32, healthBarColour, 0x00, scale);
			}
		}

Explain of the code:
The images are on a spritesheet and I can change the colours of the images. So I made a single healthbar piece that looks like 4 pixels above each other:

Pixel 1: [Always black (000)]
Pixel 2: [manaColour]
Pixel 3: [healthColour]
Pixel 4: [Always black (000)]

So at the borders I set mana and healthColour to 000. But in the middle I set the to how much health there is. Only hMax and mMax aren’t working. It’s probably because I made a little mistake or something. But I hope someone can explain it without saiying the code (Because I need to learn Java, not copying it).

[EDIT]:
Sorry placed the wrong code, it’s this one:

if (HUDSHOWN >= 2){
			for(int i = 0; i <= modifier*2; i++){
				int manaColour = -1;
				int healthColour = -1;
				int mMax = 0;
				int hMax = 0;
				
				if(mana != 0 && maxMana != 0) mMax = mana/maxMana*16;
				if(health != 0 && maxHealth != 0) hMax = health/maxHealth*16;
				
				if(i > 0 && i < modifier*2){
					for(int ih = i - 1; ih < hMax; ih++){
						healthColour = 500;
					} 
					for(int im = i - 1; im < mMax; im++){
						manaColour = 115;
					} 
				} else if(i == 0 || i == modifier*2){
					healthColour = 0;
					manaColour = 0;
				}
				
				int healthBarColour= Colours.get(-1, healthColour, manaColour, 000);
				screen.render(xOffset-2 + i, yOffset - 6, 1 + 27 * 32, healthBarColour, 0x00, scale);
			}
		}

Thanks!
-RoseSlayer