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Chapter 2 Exercises.
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‎ch02/Arithmetic.java‎

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//Exercise 2-ES-1.
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//Exercise 4.
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public class Arithmetic
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{
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public static void main (String[] args)
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{
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int num = 100;
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int factor = 20;
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int sum = 0;
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sum = num + factor; // 100+20
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System.out.println("Addition sum: " + sum);
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sum = num - factor; // 100-20
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System.out.println("Subtraction sum: " + sum);
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sum = num * factor; // 100*20
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System.out.println("Multiplication sum: " + sum);
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sum = num / factor; // 100/20
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System.out.println("Division sum: " + sum);
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}
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}

‎ch02/Assignment.java‎

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//Exercise 2-ES-1.
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//Exercise 5.
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public class Assignment
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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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txt += lang; //Assign concatenated String.
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System.out.println("Add & Assign Strings: " + txt);
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int sum = 10;
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int num = 20;
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sum += num; //Assign result (10+20=30)
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System.out.println("Add & Assign Integers: " + sum);
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int factor = 5;
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sum *= factor; //Assign result (30*5=150)
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System.out.println("Multiplication sum: " + sum);
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sum /= factor; //Assign result (150/5=30)
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System.out.println("Division sum: " + sum);
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}
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}

‎ch02/Constants.java‎

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//Exercise 2-ES-1.
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//Exercise 3.
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public class Constants
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{
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public static void main (String[] args)
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{
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//Constant score values.
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final int TOUCHDOWN = 6;
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final int CONVERSION = 1;
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final int FIELDGOAL = 3;
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//Calculate points scored.
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int td;
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int pat;
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int fg;
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int total;
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td = 4 * TOUCHDOWN;
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pat = 3 * CONVERSION;
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fg = 2 * FIELDGOAL;
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total = (td + pat + fg);
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//Output calculated total.
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System.out.println("Score: " + total);
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}
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}

‎ch02/DataTypes.java‎

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//Exercise 2-ES-1.
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//Exercise 2.
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public class DataTypes
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{
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public static void main (String[] args)
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{
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char letter = 'M';
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String title = "Java in Easy Steps";
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int number = 365;
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float decimal = 98.6f;
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boolean result = true;
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System.out.println("Initial is " + letter);
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System.out.println("Book is " + title);
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System.out.println("Days are " + number);
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System.out.println("Temperature is " + decimal);
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System.out.println("Answer is " + result);
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}
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}

‎ch02/Date.java‎

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//Exercise 2-2.
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public class Date
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{
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public static void main (String[] args)
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{
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String day = "Monday";
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int date = 16;
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String month = "April";
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int year = 2018;
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System.out.println(day);
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System.out.println(date);
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System.out.println(month);
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System.out.println(year);
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System.out.println();
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System.out.println("American Format:");
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System.out.println(day + ", " + month + " " + date + ", " + year);
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System.out.println();
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System.out.println("European Format:");
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System.out.println(day + " " + date + " " + month + " " + year);
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}
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}

‎ch02/DoubleByZero.java‎

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//Exercise 2-C.
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public class DoubleByZero
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{
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public static void main (String[] args)
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{
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double var1 = 42.0;
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double var2 = 0.0;
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double result = (var1 / var2);
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System.out.println("The result is: " + result);
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}
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}
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//The result is: Infinity

‎ch02/FirstVariable.java‎

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//Exercise 2-ES-1.
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//Exercise 1.
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public class FirstVariable
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{
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public static void main (String[] args)
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{
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String message = "Initial value.";
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System.out.println(message);
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message = "Modified value.";
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System.out.println(message);
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}
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}

‎ch02/IntByZero.java‎

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//Exercise 2-B.
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public class IntByZero
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{
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public static void main (String[] args)
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{
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int var1 = 42;
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// int var2 = 0;
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int var2 = 2;
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int result = (var1 / var2);
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System.out.println("The result is: " + result);
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}
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}
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// Exception in thread "main" java.lang.ArithmeticException: / by zero
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// at IntByZero.main(IntByZero.java:7)

‎ch02/IntExtremes.java‎

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//Exercise 2-A.
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public class IntExtremes
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{
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public static void main (String[] args)
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{
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int positiveInt = 2147483647;
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System.out.println(positiveInt);
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positiveInt = positiveInt + 1;
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System.out.println(positiveInt);
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System.out.println();
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int negativeInt = -2147483648;
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System.out.println(negativeInt);
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negativeInt = negativeInt - 1;
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System.out.println(negativeInt);
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}
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}

‎ch02/LoveJava.java‎

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//Exercise 2-E.
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public class LoveJava
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{
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public static void main (String[] args)
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{
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System.out.println("I love Java!");
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String word1 = "I";
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String word2 = "love";
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String word3 = "Java!";
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System.out.println(word1 + " " + word2 + " " + word3);
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}
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}

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