/**
 * A mug with a maximum capacity, a current amount of liquid, and a kind of
 * liquid.
 */
public class SimpleMug {

    // Instance Data Members (instance fields) 
    private final int MAX_CAPACITY; // the maximum capacity of the mug
    private int currAmount;         // the current amount of liquid in the mug
    private String liquidKind;      // the kind of liquid in the mug

    // Class (static) data members
    private static int mugCounter = 0;  // # of mugs created

    // Class constants
    public static final int SMALL_SIZE = 8;
    public static final int MEDIUM_SIZE = 12;
    public static final int LARGE_SIZE = 16;

    // Constructors 
    
    /**
     * Constructs a mug with the given maximum capacity to be filled with a 
     * given kind of liquid.  The mug starts out empty.
     * @param mugCapacity the maximum capacity of the mug
     * @param kindLiquid the kind of liquid the mug will hold
     */
    public SimpleMug(int maxCapacity, String liquidKind) {
        this.MAX_CAPACITY = maxCapacity;
	  this.currAmount = 0;
	  this.liquidKind = liquidKind;
	  SimpleMug.mugCounter++;
    }

    // Methods 
    
    /**
     * Returns the maximum capacity of the mug.
     * @return the maximum capacity of the mug
     */
    public int getMaxCapacity() {
        return MAX_CAPACITY;
    }
    
    /**
     * Returns the current amount of liquid in the mug.
     * @return the current amount of liquid in the mug
     */
    public int getCurrentAmount() {
        return currAmount;
    }
    
    /**
     * Returns the kind of liquid in the mug.
     * @return the kind of liquid in the mug
     */
    public String getLiquidKind() {
        return liquidKind;
    }
    
    /**
     * Changes the kind of liquid to be the new one given.
     * @param newKind the new kind of liquid 
     */
    public void changeLiquidKind(String newKind) {
        liquidKind = newKind;
    }
    
    /**
     * Fills the mug with the given amount of liquid.
     * @param amount the amount of liquid to add to the mug
     */
    public void fill(int amount) {
        int newAmount = currAmount + amount;
	  currAmount = newAmount;
    }
    
    /**
     * Pours the given amount of liquid out of the mug.
     * @param amount the amount of liquid to remove from the mug.
     */
    public void pour(int amount) {
        int newAmount = currAmount - amount;
	  currAmount = newAmount;
    }

    /**
     * Class (static) method to return the number of mugs created (i.e.,
     * the number of times the SimpleMug constructor has been called).
     * @return number of mugs created
     */
    public static int getMugCounter() {
        return mugCounter;
    }
}