Midterm Exam 1 Review-Spring 2007: What in the World?

Midterm Exam 1 Review-Spring 2007: What in the World?

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Questions? Answers? Comments?

Public: - When you put "Public", it means that you can call the methods of a class even if you are out of that class.
Private: - You have to be in the class in order to access the methods of that class
Void: - means the method does not return anything.
Null: - means that nothing has been assigned to a variable

Public/private - you can also declare some variables as public and private. Try looking through the SimpleTurtle class. Why would we have variables such as xPos and yPos declared as private?-Brian

What would you use these objects for?
Sound- to declare a sound class that has properties of sound, such as nodes, ect.
Picture- to declare a picture class that has properties of a pic, such as pixels
String-to write words
Turtle-to make drawings and create dances ;)

4.) char is used to store words. is characterized by single quotes (i'm confused on how and when to use this, though)

char is used to store single characters such as a,b,c. A String is an object that contains chars. Dawn Finney.

can someone answer this...public and private is the main thing im confused about right now. dont you always have to be in a class to call a method...like if a picture variable is p, then you can only implement picture methods on p, which is of the class picture

public and private are what we call visibility modifiers. If you were to declare a method in Picture as private (for instance private void privateMethod()), any other method within Picture is still able to use that method. But that same method is not accessible by calling on the instance of Picture (so p.privateMethod() doesn't work.). The easiest way to remember this is to look at the actual meanings of the words, public and private. Public property like a park can be used by anyone just like a public method can be used by any class. Private property can only be used by the owners just like how a private method can only be used within the class it's declared in. Dawn Finney

can someone help me with REMOVED. public static void main(String[]args) ? all i know is that you have to run this specially (not in interactions)

I don't even know what an answer for this would be. It declares the main method? Dawn Finney

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Midterm Exam 1 Review-Spring 2007 last edited on 6 February 2007 at 4:57 pm by unclejesse.cc.gatech.edu