module 6 terms - ap computer science a

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Last updated 3:22 PM on 1/10/23
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24 Terms

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**Access Level**
Determines the level of access other files have to the class’s data or methods.
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**Attributes**
Stores an Object’s data.
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**Class**
A blueprint for what an Object  stores and how it behaves.
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**Class Attribute**
The Attribute is created once and it is shared between all instances of the class. Class attributes can be accessed through the class name like Math.PI
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**Class Method**
Can only access class attributes. Class methods can be accessed through the class name like Math.pow()
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**Constructors**
Special methods used for constructing an Object.
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**Default Constructor**
A constructor that receives 0 parameters. When a class has 0 constructors a hidden default constructor is create that will set all objects to null, booleans to false and all other primitives to 0.
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**Encapsulation**
The combining of data (attributes) into a class.
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**equals**
A method used to check equality of two Objects.
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**final**
Used to make a variable constant.
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**Accessor/Getter**
A method that allows public access to a private attribute.
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**Information Hiding**
When classes store their data privately to prevent unwanted modifications.
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**Instance Attribute**
Every instance of an Object gets its own copy of the variable.
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**Instance Methods**
Can access both instance and class variables. Can only be accessed through an instance of class.
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**Modifiers**
Sets method or attribute properties.
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**null**
A keyword used to denote that a variable is not referencing any Object.
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**package**
A group of related classes.
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**private**
Data cannot be accessed outside the file.
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**protected**
Data can be modified by classes that share the same package or any subclass.
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**public**
Data can be fully accessed outside the file.
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**Mutator/Setter**
A method that allow private attributes to be changed publicly
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**static**
Sets an attribute or method to be a class attribute or class method.
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**this**
A keyword used to access the current instance of the class.
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**toString**
A method used to return a text version of an Object.