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Java Java Objects (Retired) Harnessing the Power of Objects Incrementing and Decrementing

Andrew Brotherton
Andrew Brotherton
7,515 Points
Posted by Andrew Brotherton
Andrew Brotherton
7,515 Points

Getting an error?

symbol: method dispense()
location: variable dispenser of type PezDispenser
3 errors

This is my code 

  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.getCharacterName());
      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");
      }
     while (dispenser.dispense()) {
      System.out.println("Chomp!"); 
     }
      if (dispenser.isEmpty()) {
        System.out.println("Ate all the PEZ");
      }
    }
}
Kristen Law
Kristen Law
16,244 Points

Hi Andrew! What errors are you getting? Can you post your code from your PezDispenser.java file?

Andrew Brotherton
Andrew Brotherton
7,515 Points
Andrew Brotherton
Andrew Brotherton
7,515 Points

--java

public class GoKart { public static final int MAX_ENERGY_BARS = 8; private String mColor; private int mBarsCount;

public GoKart(String color) { mColor = color; mBarsCount = 0; }

public String getColor() { return mColor; }

public void charge() { mBarsCount = MAX_ENERGY_BARS; }

public boolean isBatteryEmpty() { return mBarsCount == 0; }

public boolean isFullyCharged() { while (!isFullyCharged()) { mBarsCount++; } }

}

--

Kristen Law
Kristen Law
16,244 Points

I believe you posted the wrong code. That seems to be a GoKart class.

4 Answers

Kristen Law
Kristen Law
16,244 Points

Looks like you defined your dispense() method inside your isEmpty() method. It should look like this:

  public boolean isEmpty () {
    return mPezCount == 0;
  }

  public boolean dispense () {
  boolean wasDispensed = false;
    if (!isEmpty()) {
      mPezCount--;
      wasDispensed = true;
    }
    return wasDispensed;
  }
Kristen Law
Kristen Law
16,244 Points

Also, for future reference, you can format your code by adding three backticks before and after your block of code:

```
//Your code here
```

There's also a video to the right side under "Tips for asking questions" and a Markdown Cheatsheet under the textbox that may help with formatting.

Andrew Brotherton
Andrew Brotherton
7,515 Points
Andrew Brotherton
Andrew Brotherton
7,515 Points

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.getCharacterName());
  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");
  }
 while (dispenser.dispense()) {
  System.out.println("Chomp!"); 
 }
  if (dispenser.isEmpty()) {
    System.out.println("Ate all the PEZ");
  }
}

}

--java

Kristen Law
Kristen Law
16,244 Points

Do you have another file in your workspace called PezDispenser.java?

Andrew Brotherton
Andrew Brotherton
7,515 Points
Andrew Brotherton
Andrew Brotherton
7,515 Points 
public class PezDispenser {
  public static final int MAX_PEZ = 12;
  private String mCharacterName;
  private int mPezCount;

  public PezDispenser(String characterName) {
    mCharacterName = characterName;
    mPezCount = 0;
  }

  public boolean isEmpty () {
    return mPezCount == 0;

    public boolean dispense () {
    boolean wasDispensed = false;
      if (!isEmpty()) {
        mPezCount--;
        wasDispensed = true;
      }
      return wasDispensed;
    }

  }

  public void load() {
   mPezCount = MAX_PEZ; 
  }

  public String getCharacterName() {
   return mCharacterName; 
  }
}
Andrew Brotherton
Andrew Brotherton
7,515 Points
Andrew Brotherton
Andrew Brotherton
7,515 Points

yep, I just realized I didn't close that curly brace to close the method. Thanks