Showing Revision 3 created 05/25/2016 by Udacity Robot.

1. Title:
   13b s What are Java Objects
2. Description:

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   Let's do the first one,
   it says TextView = new TextView, and
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   then we pass context in as an input
   parameter to the constructor.
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   The problem with this line of code is
   that we're creating a new object but
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   we're not storing it
   properly in a variable.
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   We're saying that the variable
   should have data type TextView but
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   we forget to give it a variable name.
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   So the correct code would
   look something like this.
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    TextView followed by a variable name and
    then equals new TextView.
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    You can call the variable
    name something else but
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    we just chose to use textView
    with a lower case t.
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    So in this case,
    the error was missing variable name.
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    Let's do the next one.
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    It says, image view img = new ImageView.
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    The problem here is that this
    is not a valid object data type.
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    Android defines a class called ImageView
    with a capital I and a capital V and
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    it's squished together into one word.
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    A valid class name can't
    have any spaces in it.
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    The variable name looks okay, and
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    then creating the new image
    view looks okay as well.
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    So the only error was that it
    had an incorrect class name.
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    In the third statement, we're trying
    to create a new toggle button.
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    It says ToggleButton button
    = create ToggleButton.
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    We're calling the ToggleButton
    class here, so
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    we need to use the Java keyword new,
    not create.
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    And this is the correct code.
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    It says ToggleButton
    button = new ToggleButton.
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    The problem here was not
    using the Java keyword new.
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    New is the keyword that indicates that
    we're trying to create a new object.
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    In the fourth statement,
    we're trying to create a new toast.
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    You could've Google searched for
    how to create a new toast and
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    then compared it with this code here.
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    The problem here is that toast needs
    to be spelled with a capital T,
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    because this is a class name for Toast.
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    This is using a factory method
    like we talked about earlier.
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    This creates a new toast object and
    then it gets stored in this variable.
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    So the error here was just
    an incorrect class name.
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    So now that we know how to create
    objects, how do we use these objects?