Two Errors after compiling, why?

public class Example {

public static void main(String[] args) {
    // Your amazing code goes here...

  System.out.println("We are making a new Pez Dispenser.");
  PezDispenser dispenser = new PezDispenser("Yoda");
  System.out.printf("The dispenser character is %s\n", 
                      dispenser.mCharacterName);

  if (dispenser.isEmpty()){
      System.out.println("It is currently empty");
    }      
    System.out.println("Loading.....");      
    dispenser.load();

    if (!dispenser.isEmpty()){
      System.out.println("It is no longer empty");
    }        
}

}

This is the Error i get. Example.java:11: error: cannot find symbol
if (dispenser.isEmpty()){
^
symbol: method isEmpty()
location: variable dispenser of type PezDispenser
Example.java:17: error: cannot find symbol
if (!dispenser.isEmpty()){
^
symbol: method isEmpty()
location: variable dispenser of type PezDispenser
2 errors

public class PezDispenser{ public String mCharacterName;

public static final int MAX_PEZ = 12;

private int mPezCount;

//This is Constructer it has the same name as class //mCharacter is member character public PezDispenser(String characterName){ mCharacterName = characterName; mPezCount = 0; } public String getCharacterName(){ return mCharacterName; } public boolean isEmtpy(){ return mPezCount == 0; } public void load(){ mPezCount = MAX_PEZ; } public boolean dispense(){ boolean wasDispensed = false; if(!isEmpty()){ mPezCount--; wasDispensed = true; }
return wasDispensed; }

}