someone explain to me why this doesnt work

//example file//
public class Example {
   String Container; 
    public static void main(String[] args) {
        // Your amazing code goes here...
        System.out.println("We are making new containers");
        Container container = new Container("Yoda");
        System.out.printf("The container character is %s\n", container.getCharacterName());
        if (container.isEmpty()) {
          System.out.println("It is currently empty");
        }
      System.out.println("Loading...");
      container.load();
      if (!container.isEmpty()) {
        System.out.println("It is no longer empty");
      }
    }
}

//container file//
public class Container {
  public static final int MAX_BLOCKS = 12;
  private String mCharacterName;
  private int mBlockCount;

  public Container (String characterName) {
    mCharacterName = characterName;
    mBlockCount = 0;
  }

  public void load() {
    mBlockCount = MAX_BLOCKS;
  }

  public String getCharacterName() {
    return mCharacterName;
  }
}