1. Instance Method – CSC142 Computer Science II
Zhen Jiang
CS Dept.
West Chester University
4/11/2019

2. Table of Contents Introduction Declaration and call Access and scope
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3. Introduction Why? Why loop Why array Why method
Why object (the host of instance method)?
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4. ArrayOperation. java vs. ArrayOperations. java http://www. cs. wcupa
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5. Every thing under the control inside of object (which must be declared in the class)
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6. state: String name, breed int age
Dog class
state: String name, breed
int age
behavior: writeOutput ( ) getAgeInHumanYears ( )‏
Point object
balto
state: “Balto” (name)
8 (age)
“Siberian Husky” (breed)
behavior: getAgeInHumanYears ( )
writeOutput ( )
Point object
scooby
state: “Balto” (name)
8 (age)
“Siberian Husky” (breed)
behavior: getAgeInHumanYears ( )
writeOutput ( )

7. Declaration (signature part) and call
Constructor
When it is called?
Name
No return
Not static
Related to the use of new
Overloading
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8. Mutator Accessor toString Argument and parameter
Order and type (compatible & overloading)
Primitive type and reference type (array & object)
Accessor
Return
toString
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9. Access and Scope Attribute (property, data field, etc)
Local variable & parameter
What is “this”
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