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Chapter 5 Exercises.
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‎ch05/Comparison.java‎

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// Exercise 5-ES-1
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// Exercise 1
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public class Comparison
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{
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public static void main(String[] args)
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{
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String txt = "Fantastic";
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String lang = "Java";
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boolean state = (txt == lang);
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System.out.println("String Equality Test: " + state);
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state = (txt != lang);
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System.out.println("String Inequality Test: " + state);
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System.out.println();
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int dozen = 12;
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int score = 10;
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state = (dozen > score);
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System.out.println("Greater Than Test: " + state);
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state = (dozen < score);
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System.out.println("Less Than Test: " + state);
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}
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}

‎ch05/Condition.java‎

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// Exercise 5-ES-1
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// Exercise 3
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public class Condition
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{
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public static void main(String[] args)
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{
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int num1 = 1357;
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int num2 = 2468;
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String result;
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result = (num1 % 2 != 0) ? "Odd" : "Even";
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System.out.println( num1 + " is " + result);
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System.out.println();
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result = (num2 % 2 != 0) ? "Odd" : "Even";
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System.out.println( num2 + " is " + result);
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}
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}

‎ch05/CrazyEdWholesaleCheese.java‎

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//Exercise 5-G.
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import java.util.Scanner;
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public class CrazyEdWholesaleCheese
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{
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public static void main(String[] args)
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{
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Scanner in = new Scanner(System.in);
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System.out.print("What size cheese would you like to order? ");
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int cheeseSize = in.nextInt();
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switch(cheeseSize)
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{
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case 1 : case 2 : case 3 :
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System.out.println("You chose: " + cheeseSize + " inch diameter string cheese.");
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break;
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default :
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System.out.println("Please choose 1, 2, or 3 inch diameter string cheese.");
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return;
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}
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System.out.println("What length of cheese would you like to order? ");
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int cheeseLength = in.nextInt();
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determineCostOfOrder(cheeseSize, cheeseLength);
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}
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public static void determineCostOfOrder(int cheeseSize, int cheeseLength)
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{
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final int COST_OF_1_INCH_CHEESE = 2;
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final int COST_OF_2_INCH_CHEESE = 4;
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final int COST_OF_3_INCH_CHEESE = 6;
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final int SHIPPING_COST_OF_1_INCH_CHEESE = 2;
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final int SHIPPING_COST_OF_2_INCH_CHEESE = 2;
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final int SHIPPING_COST_OF_3_INCH_CHEESE = 4;
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final int FREE_SHIPPING_BREAKPOINT_FOR_1_INCH_CHEESE = 50;
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final int FREE_SHIPPING_BREAKPOINT_FOR_2_INCH_CHEESE = 75;
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final int FREE_SHIPPING_BREAKPOINT_FOR_3_INCH_CHEESE = 25;
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final int HANDLING_CHARGE = 5;
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int cheeseCost = 0;
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int shippingCost = 0;
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boolean isValidOrder = true;
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if ((cheeseSize == 1) && (cheeseLength > FREE_SHIPPING_BREAKPOINT_FOR_1_INCH_CHEESE))
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{
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cheeseCost = (cheeseLength * COST_OF_1_INCH_CHEESE);
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shippingCost = 0;
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}
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else if (cheeseSize == 1)
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{
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cheeseCost = (cheeseLength * COST_OF_1_INCH_CHEESE);
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shippingCost = (cheeseLength * SHIPPING_COST_OF_1_INCH_CHEESE);
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}
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else if ((cheeseSize == 2) && (cheeseLength > FREE_SHIPPING_BREAKPOINT_FOR_2_INCH_CHEESE))
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{
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cheeseCost = (cheeseLength * COST_OF_2_INCH_CHEESE);
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shippingCost = 0;
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}
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else if (cheeseSize == 2)
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{
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cheeseCost = (cheeseLength * COST_OF_2_INCH_CHEESE);
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shippingCost = (cheeseLength * SHIPPING_COST_OF_2_INCH_CHEESE);
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}
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else if ((cheeseSize == 3) && (cheeseLength > FREE_SHIPPING_BREAKPOINT_FOR_3_INCH_CHEESE))
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{
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cheeseCost = (cheeseLength * COST_OF_3_INCH_CHEESE);
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shippingCost = 0;
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}
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else if (cheeseSize == 3)
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{
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cheeseCost = (cheeseLength * COST_OF_3_INCH_CHEESE);
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shippingCost = (cheeseLength * SHIPPING_COST_OF_3_INCH_CHEESE);
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}
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else
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{
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isValidOrder = false;
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}
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int totalCost = cheeseCost + shippingCost + HANDLING_CHARGE;
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if (isValidOrder)
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{
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System.out.println("The total cost of this cheese is: $" + cheeseCost);
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System.out.println("The total shipping cost is: $" + shippingCost);
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System.out.println("The Handling Charge for this order is: $" + HANDLING_CHARGE);
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System.out.println("The total cost of this order is: $" + totalCost);
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System.out.println();
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}
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else
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{
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System.out.println("This order is too crazy!");
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}
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}
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}

‎ch05/Else.java‎

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// Exercise 5-ES-1
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// Exercise 6
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public class Else
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{
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public static void main(String[] args)
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{
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int hrs = 21;
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if (hrs < 13)
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{
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System.out.println("Good morning: " + hrs);
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}
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else if (hrs < 18)
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{
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System.out.println("Good afternoon: " + hrs);
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}
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else
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{
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System.out.println("Good evening: " + hrs);
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}
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}
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}

‎ch05/EmailOffer.java‎

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//Exercise 5-J.
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public class EmailOffer
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{
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public static void main(String[] args)
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{
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determineEmailOffer("IA", 10);
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}
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public static void determineEmailOffer(String state, int currentSpeed)
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{
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if ((state.equals("IA")) && (currentSpeed < 30))
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{
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System.out.println("Congratulations! You are eligible for a free HSI upgrade to 50M.");
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}
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else if ((state.equals("MO")) && (currentSpeed < 10))
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{
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System.out.println("Congratulations! You are eligible for a free HSI upgrade to 20M.");
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}
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else if ((state.equals("MO")) && (currentSpeed < 25))
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{
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System.out.println("Congratulations! You are eligible for a free HSI upgrade to 50M.");
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}
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else
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{
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System.out.println("We are sorry. No HSI Upgrade is available at this time.");
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}
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}
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}

‎ch05/GreenCoffeeGrowersDiscount.java‎

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//Exercise 5-I.
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public class GreenCoffeeGrowersDiscount
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{
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public static void main(String[] args)
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{
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determineDiscount("Bicycle", 50);
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}
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public static void determineDiscount(String modeOfTravel, int distanceOfCommute)
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{
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if (distanceOfCommute < 21)
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{
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System.out.println("Congratulations! You are eligible for a Free Coffee and a 30% Discount.");
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}
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else if ((modeOfTravel.equals("Bicycle")) && (distanceOfCommute > 20 && distanceOfCommute < 30))
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{
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System.out.println("Congratulations! You are eligible for a 30% Discount.");
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}
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else if ((modeOfTravel.equals("Bicycle")) && (distanceOfCommute > 29 && distanceOfCommute < 50))
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{
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System.out.println("Congratulations! You are eligible for a 20% Discount.");
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}
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else if ((modeOfTravel.equals("Bus")) && (distanceOfCommute > 34 && distanceOfCommute < 50))
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{
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System.out.println("Congratulations! You are eligible for a 50% Discount.");
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}
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else
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{
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System.out.println("We are sorry. You are not eligible for a discount at this time.");
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}
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}
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}

‎ch05/If.java‎

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// Exercise 5-ES-1
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// Exercise 5
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public class If
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{
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public static void main(String[] args)
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{
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if (5>1)
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{
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System.out.println("Five is greater than one.");
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}
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System.out.println();
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if (2<4)
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{
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System.out.println("Two is less than four.");
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System.out.println("Test succeeded.");
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}
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System.out.println();
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int num = 15;
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if (((num > 5) && (num < 10)) || (num == 12))
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{
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System.out.println("Number is 6-9 inclusive, or 12");
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}
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}
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}

‎ch05/Logic.java‎

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// Exercise 5-ES-1
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// Exercise 2
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public class Logic
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{
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public static void main(String[] args)
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{
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boolean yes = true;
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boolean no = false;
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//Add these lines to test if both conditions are true.
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System.out.println("Both YesYes True: " + ( yes && yes));
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System.out.println("Both YesNo True: " + ( yes && no));
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System.out.println();
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//Add these lines to test if either condition is true.
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System.out.println("Either YesYes True: " + ( yes || yes));
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System.out.println("Either YesNo True: " + ( yes || no));
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System.out.println("Either NoNo True: " + ( no || no));
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System.out.println();
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//Add two more lines to show an original and inverse value.
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System.out.println("Original Yes Value: " + ( yes ));
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System.out.println("Inverse Yes Value: " + ( !yes ));
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}
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}

‎ch05/LogicMethods.java‎

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//Exercises 5-A through 5-D.
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public class LogicMethods
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{
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public static void main(String[] args)
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{
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//Exercise 5-A.
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printIsLarge(4);
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//Exercise 5-B.
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printIsLargeOrSmall(47);
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//Exercise 5-C.
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printLargest(25, 9);
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//Exercise 5-D
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printLargestOdd(12, 12);
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}
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public static void printIsLarge(int number)
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{
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if (number > 99)
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{
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System.out.println("The number is large.");
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}
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}
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public static void printIsLargeOrSmall(int number)
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{
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if (number > 99)
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{
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System.out.println("The number is large.");
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}
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else if (number < 10)
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{
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System.out.println("The number is small.");
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}
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}
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public static void printLargest(int number1, int number2)
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{
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if (number1 == number2)
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{
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System.out.println("The numbers are equal.");
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}
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else if (number1 > number2)
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{
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System.out.println("The largest number is: " + number1);
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}
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else
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{
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System.out.println("The largest number is: " + number2);
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}
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}
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public static void printLargestOdd(int x, int y)
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{
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boolean xIsOdd = (x % 2 == 1);
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boolean xIsEven = (x % 2 == 0);
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boolean yIsOdd = (y % 2 == 1);
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boolean yIsEven = (y % 2 == 0);
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if ((xIsEven) && (yIsEven))
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{
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System.out.println("Neither number is ODD.");
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}
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else if ((xIsEven) && (yIsOdd))
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{
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System.out.println("The largest ODD number is: " + y);
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}
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else if ((xIsOdd) && (yIsEven))
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{
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System.out.println("The largest ODD number is: " + x);
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}
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else if ((x == y) && (xIsOdd))
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{
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System.out.println("Two ODDs make an EVEN: " + (x + y));
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}
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else if (x > y)
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{
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System.out.println("The largest ODD number is: " + x);
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}
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else if (y > x)
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{
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System.out.println("The largest ODD number is: " + y);
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}
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}
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}
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