Create Objects and Call Instance Methods

Grab a Piece of Paper!

Calculator Class Methods

The following is a diagram of a Calculator class.

Class Name: Calculator Class

Constructor: Calculator(double oper1, double oper2)

Data/Attributes: double operand1; double operand2;

Methods/Behaviors: double sum() double sum(double oper1, double oper2) double product() double product(double oper1, double oper2) double posDifference(double oper1, double oper2) double quotient(double oper1, double oper2)

Use the Java Playground

• Predict the output from running the body of main for testing.
• Run the code to determine if your prediction was correct.
• Call each of the other methods in the table above and print their values to the screen.

Dice Class Code

The following is a diagram of a Dice class.

Class Name: Dice Class

Constructors: Dice() Dice(int numSides)

Data/Attributes: int numSides;

Methods/Behaviors: int getNumSides() void setNumSides(int sides) int roll()

Use the Java Playground

• Predict the output from running the body of main for testing.
• Run the code to determine if your prediction was correct.
• Add the following statements:
  • add statements to call the accessor method and print the number of sides.
  • add a statement to change the number of sides to 10.
  • add statements to roll the dice and print the value.
  • add a statement to use the toString method.
• Run the code to test the additions you have mad to main

LocalDate Instance Methods

Practice calling methods with the LocalDate class.