Modifying variable value from method

Question

was wondering where im going wrong, any ideas?

Implement a method empty() in the TicketMachine class that simulates the effect of removing all money from the machine It should have a void return type and the body should simply set the total variable/field to zero.

Does this method need any parameters? No

Is this method a mutator or accessor? mutator

Paste the whole method into the space below

public void empty(int return) 
{ 
balance = 0; 
}

Mark: 0 out of 3

Comments:

* Test 1 (0.0 out of 3)



TicketMachine.java:26: <identifier> expected
  public void empty(int return)
                        ^
  TicketMachine.java:60: ')' expected
  }
  ^
  2 errors

The output should have been:

      No it doesn't need parameters 
       and it is a mutator
      TicketMachine emptied successfully

This is what was actually produced:

      Exception in thread "main" java.lang.NoClassDefFoundError: TicketMachine

Jonathan Holloway · Accepted Answer · 2009-10-28 20:24:42Z

1

You called your method parameter return:

public void empty(int return)

which is a reserved keyword in Java hence the error above. Rename the parameter...

answered Oct 28, 2009 at 20:24

Jonathan Holloway

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2 Comments

Drew Over a year ago

OP mentions that the method shouldn't have parameters. They are putting things between the () and apparently doesn't understand that those are parameters in Java.

Jonathan Holloway Over a year ago

Sorry, not sure what you mean. What or who is OP?

Antz · Accepted Answer · 2009-10-28 20:49:14Z

1

The question seems to indicate that there should be no parameters.

public void empty() {
balance = 0;
}

answered Oct 28, 2009 at 20:49

Antz

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6 Comments

Kumar Over a year ago

ive try'd that before, in return i got TicketMachine.java:28: cannot find symbol symbol : variable balance location: class TicketMachine balance = 0; ^

Antz Over a year ago

Is there anymore code? The sample that you have supplied does not have enough detail to be able to fully answer your question. I assumes that there was a variable in the TicketMachine class because it was referred to in your sample code.

Kumar Over a year ago

ive added the full programs code, hopefully it could make it easier

Antz Over a year ago

The variable definitions have been commented out. You need to move add a / afer the final * in the top comment . As it exists this code will not even compile.

Kumar Over a year ago

i did that because iwas playing around with the code, but evene without it being hidden this error still pops up and im still confused

|

James Cronen · Accepted Answer · 2009-10-28 20:25:06Z

0

I have no idea what you're actually asking. But one of the problems might be that return in Java is a reserved word. I can't imagine this ever compiled as you have it. Change it to something else (return0 maybe?) and see if that fixes your problem.

answered Oct 28, 2009 at 20:25

James Cronen

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1 Comment

Kumar Over a year ago

TicketMachine.java.28: cannot find symbol\ symbol : variable balance location: class TicketMachine balance = 0; ^ i get that error

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