added appendix files

Author: ChrisMayfield

ap01/Series.java renamed to appa/Series.java

@@ -1,5 +1,5 @@
 /**
- * Example method from Chapter 6.
+ * Example method from Chapter 8.
  */
 public class Series {
 

ap01/SeriesTest.java renamed to appa/SeriesTest.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2017 Allen Downey and Chris Mayfield
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import java.util.Scanner;
+
+/**
+ * Utility class for converting to/from the metric system.
+ *
+ * @author Allen Downey
+ * @author Chris Mayfield
+ * @version 6.1.5
+ */
+public class Convert {
+
+    public static final double CM_PER_INCH = 2.54;
+
+    public static final int IN_PER_FOOT = 12;
+
+    /**
+     * Converts a measurement in centimeters to inches.
+     *
+     * @param cm length in centimeters
+     * @return length in inches
+     */
+    public static double toImperial(double cm) {
+        return cm / CM_PER_INCH;
+    }
+
+    /**
+     * Converts a length in feet and inches to centimeters.
+     *
+     * @param feet how many feet
+     * @param inches how many inches
+     * @return length in centimeters
+     */
+    public static double toMetric(int feet, int inches) {
+        int total = feet * IN_PER_FOOT + inches;
+        return total * CM_PER_INCH;
+    }
+
+    /**
+     * Tests the conversion methods.
+     *
+     * @param args command-line arguments
+     */
+    public static void main(String[] args) {
+        double cm, result;
+        int feet, inches;
+        Scanner in = new Scanner(System.in);
+
+        // test the Imperial conversion
+        System.out.print("Exactly how many cm? ");
+        cm = in.nextDouble();
+        result = toImperial(cm);
+        System.out.printf("That's %.2f inches\n", result);
+        System.out.println();
+
+        // test the Metric conversion
+        System.out.print("Now how many feet? ");
+        feet = in.nextInt();
+        System.out.print("And how many inches? ");
+        inches = in.nextInt();
+        result = toMetric(feet, inches);
+        System.out.printf("That's %.2f cm\n", result);
+    }
+}

appb/Convert.java

@@ -0,0 +1,23 @@
+import java.awt.Rectangle;
+
+/**
+ * Example from "My method doesn't return what I expect."
+ */
+public class Complex {
+
+    public static Rectangle intersection(Rectangle a, Rectangle b) {
+        int x1 = Math.min(a.x, b.x);
+        int y1 = Math.min(a.y, b.y);
+        int x2 = Math.max(a.x + a.width, b.x + b.width);
+        int y2 = Math.max(a.y + a.height, b.y + b.height);
+        Rectangle rect = new Rectangle(x1, y1, x2 - x1, y2 - y1);
+        return rect;
+    }
+
+    public static void main(String[] args) {
+        Rectangle x = new Rectangle(0, 0, 10, 10);
+        Rectangle y = new Rectangle(-5, -5, -5, -5);
+        System.out.println(intersection(x, y));
+    }
+
+}

ap02/Drawing.java renamed to appc/Drawing.java

@@ -0,0 +1,20 @@
+/**
+ * Infinite loop example.
+ */
+public class Infinite {
+
+    public static void main(String[] args) {
+        int x = 1;
+        int y = -1;
+
+        while (x > 0 && y < 0) {
+            // do something to x
+            // do something to y
+
+            System.out.println("x: " + x);
+            System.out.println("y: " + y);
+            System.out.println("condition: " + (x > 0 && y < 0));
+        }
+    }
+
+}