Error??? java> MethodConstant dispenser = new MethodConstant("Yoda");

treehouse:~/workspace$ java-repl
Picked up JAVA_TOOL_OPTIONS: -Xmx128m
Picked up _JAVA_OPTIONS: -Xmx128m
Welcome to JavaREPL version 303 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_65)
Type expression to evaluate, :help for more options or press tab to auto-complete.
java> :load MethodConstant.java
Loaded source file from MethodConstant.java
java> MethodConstant dispenser = new MethodConstant("Yoda");
ERROR: cannot find symbol
symbol: class MethodConstant
location: interface Evaluation
MethodConstant method$3f06zr157gtbhdxmaly9();

why do I get this error whilst using repl? I have checked for syntax errors and found nothing wrong. Also my code runs fine. Here it is below

public class om {

  public static void main(String[] args) {
    System.out.println("We are a making a new Pez Dispencer.");
    MethodConstant dispenser = new MethodConstant("Yoda");
    System.out.printf("The dispencer character is %s\n", dispenser.getCharacterName());

  }
}

& the other file is

public class MethodConstant {

  public static final int MAX_PES = 12;
  private String mCharacterName;   
  private int mPezCount;

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

  public boolean isEmpty() {
    return mPezCount == 0
  }
  public void load()  { 
    mPezCount = MAX_PES;
  }
  public String getCharacterName() {
    return mCharacterName;
  }
}

[MOD: edited code block - srh]