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18 Cards in this Set
- Front
- Back
Variable
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Represents objects (words, letters, numbers, and so on)
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Primitive
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Variables that reserve memory
Examples: int (numbers), double (decimals), boolean (true/false) |
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Method
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Actions/instructions. End in parentheses.
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Object
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Set of data combined with methods/actions, statuses, and behavior. Example: JButton fire = new JButton
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Variable declaration
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double pi = 3.14;
private JBUtton = flyButton; myPetRock (declaration) = new (instantiation) |
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Constructor method
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Like a method, but shares same name as class and cannot return a value
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Method paremeters
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Methods return data (unless it's void). Parameters are stuff in the method's parentheses.
Example: public drawNow(String s) |
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Assignment
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Values assigned to variables
Example: int a = 5 ^ |
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Void
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A method that does not have a return type
*Never used in constructors |
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Applets versus Applications
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(All programs are either applications or applets.)
-Applets usually smaller -Applets contain contain init() method -Applets basically internet applications -Applications contain main() method -Have access to entire computer |
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Public
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Visible to al
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Private
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Visible only to the class to which they belong
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Scope
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The accessibility of a variable.
-If variable declared at top of class, is accessible to all other methods. If declared in method, can only be used in that method (local method). |
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Literal
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Values for variables that are written directly into a program. Represents the values of all primitives.
Example: boolean = true; int = 7 |
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Object instantiation
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myPetRock (declaration) = new (instatiation)
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Return
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Used to finish the execution of a method. Transfers back to the caller of the method.
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Algorithm
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Step-by-step procedures for calculations
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Local variables
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Declared in method and only visible/usable within said method.
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