first commit

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/Brick.ctxt

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+#BlueJ class context
+comment0.params=height\ width\ depth
+comment0.target=Brick(int,\ int,\ int)
+comment0.text=\n\ Create\ a\ Brick\ given\ edge\ lengths\ in\ centimeters.\n\ @param\ height\ The\ brick's\ height.\n\ @param\ width\ The\ brick's\ width.\n\ @param\ depth\ The\ brick's\ depth.\n
+comment1.params=
+comment1.target=double\ getSurfaceArea()
+comment1.text=\n\ @return\ The\ surface\ area\ of\ this\ brick\ in\ square\ centimeters.\n
+comment2.params=
+comment2.target=double\ getWeight()
+comment2.text=\n\ @return\ The\ weight\ of\ this\ brick\ in\ kg.\n
+comment3.params=
+comment3.target=int\ getVolume()
+comment3.text=\n\ @return\ The\ volume\ of\ this\ brick\ in\ cubic\ centimeters.\n
+comment4.params=
+comment4.target=double\ getHeight()
+comment4.text=\n\ @return\ The\ height\ of\ this\ brick\ in\ centimeters.\n
+numComments=5

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/Brick.java

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+/**
+ * Brick models a simple brick.
+ * 
+ * @author: Michael Kölling and David J. Barnes
+ * @version 2016.02.29
+ */
+public class Brick
+{
+    // Constant.
+    private static final int WEIGHT_PER_CM3 = 2;  // weight per cubic cm in grams
+
+    private int height;
+    private int width;
+    private int depth;
+
+    /**
+     * Create a Brick given edge lengths in centimeters.
+     * @param height The brick's height.
+     * @param width The brick's width.
+     * @param depth The brick's depth.
+     */
+    public Brick(int height, int width, int depth)
+    {
+        this.height = height;
+        this.width = width;
+        this.depth = depth;
+    }
+
+    /**
+     * @return The surface area of this brick in square centimeters.
+     */
+    public double getSurfaceArea()
+    {
+        double side1 = width * height;
+        double side2 = width * depth;
+        double side3 = depth * height;
+        double total = (side1 + side1 + side3) * 2;
+
+        return total;
+    }
+
+    /**
+     * @return The weight of this brick in kg.
+     */
+    public double getWeight()
+    {
+        return (getVolume() * WEIGHT_PER_CM3) / 1000;
+    }
+
+    /**
+     * @return The volume of this brick in cubic centimeters.
+     */
+    public int getVolume()
+    {
+        return width * height * depth;
+    }
+
+    /**
+     * @return The height of this brick in centimeters.
+     */
+    public double getHeight()
+    {
+        return height;
+    }
+}

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/Pallet.ctxt

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+#BlueJ class context
+comment0.params=bricksInPlane\ height
+comment0.target=Pallet(int,\ int)
+comment0.text=\n\ Create\ a\ pallet\ with\ a\ given\ number\ of\ bricks.\n\ @param\ bricksInPlane\ The\ number\ of\ bricks\ in\ each\ level\ on\ the\ base.\n\ @param\ height\ The\ number\ of\ bricks\ stacked\ on\ top\ of\ each\ other.\n
+comment1.params=
+comment1.target=double\ getWeight()
+comment1.text=\n\ @return\ The\ weight\ of\ the\ pallet\ (in\ kg)\n
+comment2.params=
+comment2.target=double\ getHeight()
+comment2.text=\n\ @return\ The\ height\ of\ this\ stack\ (in\ cm)\n
+numComments=3

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/Pallet.java

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+
+/**
+ * A pallet is a stack of bricks on a wooden base.
+ *
+ * @author: Michael Kölling and David J. Barnes
+ * @version 2016.02.29
+ */
+public class Pallet
+{
+    private static final double BASE_WEIGHT = 6.5;  // in kg
+    private static final double BASE_HEIGHT = 15;  // in cm
+
+    private Brick aBrick;
+    private int bricksInPlane;
+    private int height;
+
+    /**
+     * Create a pallet with a given number of bricks.
+     * @param bricksInPlane The number of bricks in each level on the base.
+     * @param height The number of bricks stacked on top of each other.
+     */
+    public Pallet(int bricksInPlane, int height)
+    {
+        this.bricksInPlane = bricksInPlane;
+        this.height = height;
+        aBrick = new Brick(8, 20, 12);
+    }
+
+    /**
+     * @return The weight of the pallet (in kg)
+     */
+    public double getWeight()
+    {
+        int numberOfBricks = bricksInPlane * height;
+        return aBrick.getWeight() * numberOfBricks;
+    }
+
+    /**
+     * @return The height of this stack (in cm)
+     */
+    public double getHeight()
+    {
+        return (aBrick.getHeight() % height) + BASE_HEIGHT;
+    }
+}

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/README.TXT

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+Project: bricks
+Authors: Michael Kölling and David J. Barnes
+
+This project is part of the material for the book
+
+   Objects First with Java - A Practical Introduction using BlueJ
+   Sixth edition
+   David J. Barnes and Michael Kölling
+   Pearson Education, 2016
+
+Here is a part of an application for a company producing bricks.
+Bricks are delivered in pallets (stacks of bricks).
+
+The Pallet class is supposed to provide methods telling its height
+and weight.
+
+There are (at least) four errors in this project. Find them. Fix them.
+Then discuss how you went about finding the errors. What strategies
+did you employ?

Semester 1/Programming 1/Java/examples/projects/chapter09/bricks/package.bluej

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+#BlueJ package file
+dependency1.from=Pallet
+dependency1.to=Brick
+dependency1.type=UsesDependency
+objectbench.height=76
+objectbench.width=760
+package.editor.height=435
+package.editor.width=652
+package.editor.x=70
+package.editor.y=80
+package.numDependencies=1
+package.numTargets=2
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.editor.height=570
+readme.editor.width=846
+readme.editor.x=34
+readme.editor.y=23
+target1.editor.height=708
+target1.editor.width=893
+target1.editor.x=50
+target1.editor.y=60
+target1.height=60
+target1.name=Brick
+target1.naviview.expanded=true
+target1.showInterface=false
+target1.type=ClassTarget
+target1.typeParameters=
+target1.width=120
+target1.x=290
+target1.y=200
+target2.editor.height=705
+target2.editor.width=835
+target2.editor.x=50
+target2.editor.y=60
+target2.height=60
+target2.name=Pallet
+target2.naviview.expanded=true
+target2.showInterface=false
+target2.type=ClassTarget
+target2.typeParameters=
+target2.width=120
+target2.x=140
+target2.y=100