CSA Unit 2
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Last updated 2:04 PM on 10/4/22
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20 Terms
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Class
defines a new abstract data type, blueprint of the attributes and behaviors of an object
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Object
specific creation from the class, called an instance of the class
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Instance
an object of a class
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Method
behaviors that an object can do
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Parameter
a characteristic or constant factor, limit
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Attribute
the data elements associated with an entity
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primitve data types
int, double, boolean
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constructor
same as class name
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non-static method
methods that needs an object to refer to when called
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static method
method that can be used by just referring to the name of the class
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void
method does not return anything
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substring(0,4)
returns string from index 0-3
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word = long
word.indexOf("o")
word.indexOf("o")
returns 1
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word = long
word.indexOf("k")
word.indexOf("k")
returns -1
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autoboxing
the automatic conversion between a primitive value and a corresponding wrapper object, ex: int to Integer
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unboxing
the automatic conversion of wrapper class to the primitive type, ex: Integer to int
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math.random()
returns a value 0-1, but not 1
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(int) (math.random())
returns 0 or 1
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(int) (math.random() * 5) + 7
returns a number 7-12, but not 12
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math.pow (10, 2)
10^2