StarField Health Bar

package net.risenphoenix.jnk.StarField.HUD;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

import net.risenphoenix.jnk.StarField.Engine;
import net.risenphoenix.jnk.StarField.INIT;

public class HealthBar implements SFHudElement {

    double currentHealth;
    double healthLimit;
    double percentage;

    BufferedImage heart1;
    BufferedImage heart2;
    BufferedImage heart3;

    public HealthBar() {
        this.heart1 = Engine.RE.getResource("heart_full");
        this.heart2 = Engine.RE.getResource("heart_half");
        this.heart3 = Engine.RE.getResource("heart_none");
    }

    @Override
    public void drawElement(Graphics g) {
        this.currentHealth = Engine.game.getPlayer().getHealth();
        this.healthLimit = Engine.game.getPlayer().getHealthLimit();
        int numFull;
        int numEmpty;
        int halfPos;

        numEmpty = (int) Math.ceil((100 - this.currentHealth) / 10);
        numFull = (int)this.currentHealth / 10;
        halfPos = numFull;

        boolean shouldDrawHalf = false;
        boolean shouldDrawFull = false;

        // Half Heart Logic
        if (((int)this.currentHealth % 10) < 5 && ((int)this.currentHealth % 10) > 0) {
            shouldDrawHalf = true;
        } else if (((int)this.currentHealth % 10) > 5) {
            shouldDrawFull = true;
        }

        // Dead Hearts
        for(int i = (INIT.getFrameSize().width - 40) - (9*23); i < INIT.getFrameSize().width && numEmpty > 0; i += 23) {
            g.drawImage(this.heart3, i, 5, null);
            numEmpty--;
        }

        // Full Hearts
        for(int i = INIT.getFrameSize().width - 40; i > 0 && numFull > 0; i -= 23) {
            g.drawImage(this.heart1, i, 5, null);
            numFull--;
        }

        // For Dynamic Half Heart
        if (shouldDrawHalf) {
            g.drawImage(this.heart2, (INIT.getFrameSize().width - 40) - (halfPos*23), 5, null);
        } else if (shouldDrawFull) {
            g.drawImage(this.heart1, (INIT.getFrameSize().width - 40) - (halfPos*23), 5, null);
        }

        g.setColor(Color.WHITE);

        int xPos;

        // Determine xPosition of Readout
        if (this.currentHealth == 100) {
            xPos = ((INIT.getFrameSize().width - 40) - (10*23) - 5);
        } else {
            xPos = ((INIT.getFrameSize().width - 40) - (10*23));
        }

        // Numeric Readout
        g.drawString("" + (int)this.currentHealth, xPos, 20);
    }

}