*Note, the majority of this lesson is located within the Unit 4 Guide*

How might you tell the story behind the data you worked with in the previous unit as a visualization?

Through the creation of visualizations, like graphs, diagrams, and animations, I can create representations of data. These representations can transform data into a format that is more easily understood and more relatable, allowing me to tell a story.

What do you notice/wonder about the code in this program?

I noticed that this program uses a static method when printing the number of members (number of objects created in a class). I wonder why the logic the counting of the members is not also included in this class.

Summary

In this lesson, I learned how to create static variables and methods. Static variables and methods are not specific to one instance of a class, and can be instead called from the class itself, applying to all instances that may have been created. In this case, static variables can be altered through instances of a class or directly form a separate class altogether. Additionally, static variables and methods can be called without the creation of any instances at all.

*Note, the majority of this lesson is located within the Unit 4 Guide*

How could the owner change the prices of all the desserts they sell so that the prices are all whole numbers?

The owner could round the prices to the nearest dollar. If the price requires 1 to 49 cents, round down, otherwise, round up.

What does casting mean?

In Java, casting is the conversion of one data type to another.

Look at the Food Truck question in your activity guide. How did you round down?

To round down, I simply converted (or cast) the double values into integer values, automatically truncating each price.

Summary

In this lesson, I learned how to cast from one data type to another, specifically from integers to doubles and vice-versa. Converting from doubles to integers can be used to truncate or round numbers. Converting form integers to doubles widens numbers to include decimal points.

*Note, the majority of this lesson is located within the Unit 4 Guide*

What do you notice/wonder about the code in this program?

I noticed that the code in this program uses == to compare two objects. I wonder how this result will compare when using the equals() method.

When would it be useful to use the == or != operators with objects?

Whenever the reference location of two objects is useful to know, it is useful to use the == or != operators, such as determining if two objects are an alias or not for one object.

When would it not be useful to use the == or != operators with objects?

When only the equality of two objects is useful, regardless of their reference location, it is not useful to use the == or != operators, as they will return false in many instances where the desired outcome is true.

Summary

In this lesson, I learned how to use the == and .equals() operator and method to check for reference locator equality. I also learned how to override the .equals() method to check for true object equality or instance variable equality.

*Note, the majority of this lesson is located within the Unit 4 Guide*

What do you notice/wonder about the code in this program?

I noticed that this program uses a not operator (!) to tell when a value is not equal to another value. I wonder what other forms of logical operators I can use within Java.

Summary

In this lesson, I used NOT, OR, and AND logical operators to compare conditions that may use operators of their own. Using these operators, I can improve the efficiency of my code, not requiring multiple if statements to achieve equal functionality. 

*Note, the majority of this lesson is located within the Unit 4 Guide*

What do you notice/wonder about the code in this program?

I noticed that this program uses a multi-selection if statement to choose between three different shipping methods. I wonder why a switch statement is not used in place of the multi-selection statement.

Summary

In this lesson, multi-selection statements to choose between multiple conditions in order to execute multiple blocks of code depending on the given condition. This significantly increases efficiency over simply using nested if statement, and can increase functionality through the execution order of the multi-selection statement.

*Note, the majority of this lesson is located within the BingoCaller FRQ Handout*

What knowledge and skills did you use on this FRQ that you learned in this unit?

The majority of new skills that I used on the FRQ in this unit were around the use of nested if statements, and multiple selection if statements. These skills helped me build logical structures that allowed me to successfully complete the FRQ.

Summary

In this lesson, I integrated all of the concepts I learned throughout the unit to solve a three-part FRQ to create a simulated bingo caller. This included the use of if-else statements and the Math.random() method.