Interfaces vs Abstract Classes

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18 Terms

1
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interface
only public static final variables
2
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interface
variables must datatype and value
3
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interface
final variables are not given default values inherently
4
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interface
words public static and final are optional
5
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interface
methods are all public and abstract; words are optional
6
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interface
method header must end with a semicolon ;
7
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interface
no constructors allowed
8
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interface
only extend interfaces
9
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interface
implemented by classes
10
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interface
all methods must be overridden when implemented
11
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abstract class
can have any type of variable
12
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abstract class
can have abstract or concrete methods
13
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abstract class
must write 'abstract'
14
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abstract method
can not have {} braces; must end with a semicolon ;
15
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non abstract method
must have {} braces
16
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abstract class
public or private constructor needed
17
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abstract class
extends other classes
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abstract class
abstract methods must be overridden when extended