AP Computer Science Homework Set 10 Classes and Constructor

AP Computer ScienceHomework Set 10Classes and ConstructorP10A. Below is a driver class and sample output of a program that createsinstances of class MyPod:import java.util.ArrayList;public class MyPodDriver{public static void main( String[] args ){MyPod mp1 = new MyPod("White");System.out.println( "Printing serial number using objectref: " + mp1.getSerialNumber() );System.out.println( "Printing serial number using class ref:" + MyPod.getSerialNumber() );System.out.println( "MyPod color is: " + mp1.getColor() );System.out.println( "MyPod partNumber is: " +mp1.getPartNumber() );MyPod mp2 = new MyPod();mp2.setColor("Blue");System.out.println("\n");System.out.println( "Printing serial number using objectref: " + mp2.getSerialNumber() );System.out.println( "Printing serial number using class ref:" + MyPod.getSerialNumber() );System.out.println( "MyPod color is: " + mp2.getColor() );System.out.println( "MyPod partNumber is: " +mp2.getPartNumber() );MyPod mp3 = new MyPod("Red");System.out.println("\n");System.out.println( "Printing serial number using objectref: " + mp3.getSerialNumber() );System.out.println( "Printing serial number using class ref:" + MyPod.getSerialNumber() );System.out.println( "MyPod color is: " + mp3.getColor() );System.out.println( "MyPod partNumber is: " +mp3.getPartNumber() );} // end main} // end class MyPodDriverPage 1AP Computer Science – HW Set 10http://thecubscientist.com

Write the class definition for the MyPod class. The class should include thefollowing:a. a String that holds the color of the MyPod along with setters and getters for theString variable.b. A zero-argument and one-argument constructor. The one-argument constructorshould take a String parameter to initialize the color of the MyPod.c. a static int serialNumber that is incremented when a new instance of a MyPodobject is instantiated from either a zero-argument or one-argument constructor.d. a final static PARTNUMBER that is initialized to the int 9876 along with agetter for this variable.P10B. Fun with Autoboxing! The “Big Five” rules for autoboxing on page 290 aregood to know. Write a short program that demonstrates each of these rules.P10C.Use the Calendar method getTimeInMillis() to time how long it takes to createand fill a 1000 element array with random numbers between 1 and 100 and anArrayList of Integers filled with random numbers between 1 and 100. Which do youthink is faster?P10E.P10F.codingbatcodingbatPage 2AP Computer Science – HW Set 10http://thecubscientist.com

By the end of the lesson students should be able to:a. Explain the difference between regular (non-static) and static methods.b. Write the Java code to create a static method.c. Explain the reason for using a static variable and give an example of a situation where it canbe used.d. Write the Java code to create and initialize a static variable using the keyword “static.”e. Explain the reason for using a “static final” variable and given an example of a situationwhere it can be used.f. Write the Java code to create and initialize a “final static” variable.g. Explain the reason for using keyword “final” to create a “final method” and a “final class.”h. Write the Java code to use the Math class methods Math.random(), Math.abs(),Math.round(), Math.min(), and Math.max().i. Write the Java code to “wrap” primitives using the appropriate Wrapper class: Boolean,Character, Byte, Short, Integer, Long, Float, and Double.j. Explain the concept of autoboxing and auto-unboxing.k. Write Java code that uses autoboxing with method arguments, return values, booleanexpressions, operations on numbers, and assignments.l. Write the Java code to format numbers and dates using String.format().Page 3AP Computer Science – HW Set 10http://thecubscientist.com