G4G0-1/Semester 1/Programming 1/Week 3/Week 3 Programming 1 - Understanding Class Definitions.md

Lecture 1 (11:00)

Lecture 2 (14:00)

Modifiers

private
public

• These are two examples of modifiers in java. Will cover more in chapter 3

Mutator Vs Accessor Methods

public void changeColour( int newColour ) 
{
	colour = newColour;
	draw();
}

• An example of a mutator method. Since the method mutates an integer, and does not return a value.

public int getPrice()
{
	return price;
}

• This would be an example of an accessor method. Since this accesses a value and outputs to a location.

Formal Vs Actual Parameter

public void changeSize( int newDiameter )

• newDiameter is the formal parameter
• The value of newDiameter is the actual parameter

Good Practices

• Vertically align braces, since it allows for better error checking

Extra Stuff

• Homework Wednesday
• Name everything exactly, marking is automated