Lecture 27

Announcements

Talking Points

Show and Tell

In pairs,

1. Write a UML diagram describing one thing you brought to class.
2. Write the basic code for that diagram.
3. Find another pair.
4. Write a method in your class that uses their class as a parameter.

static means not part of any particular object. A Human class's getSpecies method would be static because it is shared by all Humans. A Human class's getName method would not be static because each human has their own name.

Designing a Class

Questions to ask yourself when designing classes

• What makes one of these different from another? (these are fields)

• What can change about one of these? (these are fields)

• What can one of these do? (these are methods)

• What things can I do to one of these? (methods, but only part of this class if they are more associated with this type of thing than with me)

• What fields would I need to write the methods?

From Class

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       MedicineBox
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double pinkness
double length, width, height
Pill[] contents
String brand
boolean isOpen
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Pill removeAPill()
void addAPill(Pill)
void open()
void close()
int countPills()
double getWidth()
double getHeight()
double getLength()
double getVolume()
boolean willFitInside(Pocket)
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       Bag
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Color color
double size
Fabric material
double weight
boolean openness
ArrayList<Object> contents
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open(): void 
close(): void
store(Object): void
empty(): Object[]
addWearAndTear(double): void
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