For example, if you wanted to create a virtual coffee cup, and then fill it with virtual coffee, your code would look like this:

// In Source Packet in ex2/CoffeeCup.java

// Approach 1

class CoffeeCup {

private int innerCoffee = 355;

// no constructors defined in this version of CoffeeCup

//...

Or an acceptable alternative version of the code to initialize your object could look like this:

// In Source Packet in ex5/CoffeeCup.java

// Approach 3

class CoffeeCup {

private int innerCoffee;

// Only two constructors defined in this

// version of CoffeeCup

public CoffeeCup() {

}

public CoffeeCup(int startingAmount) {

if (startingAmount < 0) {

String s = "Can't have negative coffee.";

throw new IllegalArgumentException(s);

}

innerCoffee = startingAmount;

}

//...

}

}