Added 05

website/csc1351/05/1351-calc.php

+<?php include("../../header2.php") ?>
+<h2>Basic Graphics: The Calculator</h2>
+<p>This lab will make you familiar with the basic
+   graphics programming environment. It is a necessary
+   preparation for your final project. This lab should
+   also help you become familiar with anonymous inner
+   classes.
+   </p>
+<p>The basic graphics package is distributed as
+  <a href="https://www.cct.lsu.edu/~sbrandt/csc1351/BasicGraphics.zip">
+  a Netbeans package,</a> and Calculator.java is one of the
+  applications it comes with (look in the basicgraphics.calculator package). By default, the Calculator looks
+  like this:</p> <img src="CalcPic.jpg" />
+<p>All the buttons work. For example, if you type the sequence "3.2+1.1=" you
+  will see the result "4.3". The "Clr" button clears the screen so you
+  can type a new expression for evaluation.</p>
+<p>Obviously, on Mars we will need a more advanced calculator.
+   Our survival will depend upon it.
+   Your assignment is to modify the Calculator.java file so that the
+  calculator looks like this:</p>
+  <img src="CalcPicAssignment.png" width="500"/>
+<p>The first thing you will need to get working are the various functions
+   to fetch data about Mars. This is available to you from the
+   <a href="MarsData.java">MarsData class,</a>
+   which will fetch live information about the Red Planet from the
+   internet. To use this class, simply instantiate it and read its fields.
+   (Note: You do not need to download this file or the tester if you have the latest <a href="https://www.cct.lsu.edu/~sbrandt/csc1351/BasicGraphics.zip">BasicGraphics.zip</a> installed, since they are already present inside it)
+
+   <pre>
+   MarsData md = new MarsData();
+   setValue(md.declination); // sets the current value of the calculator
+   update(); // updates the calculator display
+   </pre>
+
+   The next thing you should work on is the sin() function. You
+   can find this as a static method on the java.lang.Math package. You call
+   it like this:
+   <pre>
+   double val1 = ...;
+   double val2 = Math.sin(val1);
+   </pre>
+   All the other functions, i.e. cos(), log(), exp() are also in the java.lang.Math
+   package and must be called in the same manner.
+   </p>
+   <p>When you update the layout in Calculator.java,
+   use the name "Sin" for the "Sin" button, "Exp" for
+   the "Exp" button and so on. Use the name "M" for the "M+" button,
+   "R" for the "MR" button, and "?" for the "+/-" button.</p>
+   <p>The tester requires you to let go of the mouse button quickly after
+   you start your application. Java will take over and move the mouse as
+   well as press the buttons to test your app. The first thing it will test
+   is sin(), then cos(), etc.</p>
+   <p>The tester consists of two files. <a href='CalcTester.java'>CalcTester.java</a>
+   and <a href='Auto.java'>Auto.java</a>. (If you get the latest
+   version of BasicGraphics, they will already be included)
+   <p>The "M+" button saves a value into the memory. The "MR" button recalls
+   the last value saved to memory with "M+".</p>
+   <p>The "+/-" button will negate the current value. It can be pressed at
+   any time. So the sequence "3" "+/-" "." "4" should enter the value "-3.4".</p>
+   <table border='1' cellpadding='5' cellspacing='0'>
+   <tr><th>Layout Key</th><th>Button Text</th><th>Function</th></tr>
+   <tr><td>RA</td><td>Right Ascension</td><td>Get the right ascension of Mars from the MarsData class.</td></tr>
+   <tr><td>DECL</td><td>Declination</td><td>Get the declination of Mars from the MarsData class.</td></tr>
+   <tr><td>ED</td><td>Earth Distance</td><td>Get the distance between Mars and the Earth from the MarsData class.</td></tr>
+   <tr><td>SD</td><td>Sun Distance</td><td>Get the distance between Mars and the Sun from the MarsData class.</td></tr>
+   <tr><td>Sin</td><td>Sin</td><td>Take the sin of the current value</td></tr>
+   <tr><td>Cos</td><td>Cos</td><td>Take the cos of the current value</td></tr>
+   <tr><td>Exp</td><td>Exp</td><td>Take the exponential of the current value</td></tr>
+   <tr><td>Log</td><td>Log</td><td>Take the log of the current value</td></tr>
+   <tr><td>M</td><td>M+</td><td>Store the current value to memory</td></tr>
+   <tr><td>R</td><td>MR</td><td>Retrieve the value in memory</td></tr>
+   <tr><td>?</td><td>+/-</td><td>Negate the current value</td></tr>
+   </table>
+   <?php showFile("Calculator.java"); ?>
+   <?php showFile("MarsData.java"); ?>
+   <?php showFile("CalcTester.java"); ?>
+   <?php showFile("Auto.java"); ?>
+<?php include("../../footer.php") ?>

website/csc1351/05/Auto.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package basicgraphics.calculator;
+
+import basicgraphics.BasicFrame;
+import java.awt.AWTException;
+import java.awt.Component;
+import java.awt.Point;
+import java.awt.Robot;
+import java.awt.event.InputEvent;
+import javax.swing.JLabel;
+import javax.swing.JTextArea;
+import javax.swing.text.JTextComponent;
+
+/**
+ *
+ * @author sbrandt
+ */
+public class Auto {
+    Robot robot;
+    public Auto() throws AWTException {
+        robot = new Robot();
+    }
+    public void press(Component c) {
+        delay();
+        Point pt = new Point(c.getLocationOnScreen());
+        robot.mouseMove(pt.x+1, pt.y+1);
+        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+    }
+
+    public void press(BasicFrame bf, String b) {
+        press(bf.getComponent(b));
+    }
+
+    private void delay() {
+        try {
+            Thread.sleep(100);
+        } catch (InterruptedException ex) {
+        }
+    }
+    
+    public String getValue(BasicFrame bf, String txt) {
+        delay();
+        Component c = bf.getComponent(txt);
+        if(c instanceof JLabel) {
+            return ((JLabel) c).getText();
+        } else if(c instanceof JTextArea) {
+            return ((JTextArea) c).getText();
+        } else if(c instanceof JTextComponent) {
+            return ((JTextComponent) c).getText();
+        }
+        throw new Error("Not a text component");
+    }
+}

website/csc1351/05/CalcTester.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package basicgraphics.calculator;
+
+import basicgraphics.BasicFrame;
+import java.text.DecimalFormat;
+import java.util.Random;
+
+/**
+ *
+ * @author sbrandt
+ */
+public class CalcTester {
+
+    public static final Random RAND = new Random();
+    public static final DecimalFormat df = new DecimalFormat("#.######");
+
+    public static void press(Auto a, BasicFrame bf, double d) {
+        if (d < 0) {
+            a.press(bf, "?");
+            d = -d;
+        }
+        String s = df.format(d);
+        for (int i = 0; i < s.length(); i++) {
+            a.press(bf, "" + s.charAt(i));
+        }
+    }
+    
+    static double reval(double d) {
+        return Double.parseDouble(df.format(d));
+    }
+
+    public static void main(String[] args) throws Exception {
+        try {
+            assert false;
+            throw new Error("Enable assertions");
+        } catch (AssertionError ae) {
+        }
+        Auto a = new Auto();
+        Calculator c = (Calculator) Class.forName(args[0]).newInstance();
+        c.init();
+        Thread.sleep(1000);
+        for (int i = 0; i < 3; i++) {
+            double d1, d2, dval;
+            String val;
+
+            System.out.println("Test Sin");
+            d1 = Math.PI * RAND.nextInt(10);
+            a.press(c.bf, "C");
+            press(a, c.bf, d1);
+            val = a.getValue(c.bf, "D");
+            d1 = Double.parseDouble(val);
+            a.press(c.bf, "Sin");
+            val = a.getValue(c.bf, "D");
+            dval = Double.parseDouble(val);
+            d2 = reval(Math.sin(d1));
+            assert dval == d2 : "" + dval + " != " + d2;
+            
+            System.out.println("Test Cos");
+            d1 = Math.PI * RAND.nextInt(10);
+            a.press(c.bf, "C");
+            press(a, c.bf, d1);
+            val = a.getValue(c.bf, "D");
+            d1 = Double.parseDouble(val);
+            a.press(c.bf, "Cos");
+            val = a.getValue(c.bf, "D");
+            dval = Double.parseDouble(val);
+            d2 = reval(Math.cos(d1));
+            assert dval == d2 : "" + dval + " != " + d2;
+            
+            System.out.println("Test Exp");
+            d1 = 0.1 * RAND.nextInt(10);
+            a.press(c.bf, "C");
+            press(a, c.bf, d1);
+            val = a.getValue(c.bf, "D");
+            d1 = Double.parseDouble(val);
+            a.press(c.bf, "Exp");
+            val = a.getValue(c.bf, "D");
+            dval = Double.parseDouble(val);
+            d2 = reval(Math.exp(d1));
+            assert dval == d2 : "" + dval + " != " + d2;
+            
+            System.out.println("Test Log");
+            a.press(c.bf, "Log");
+            val = a.getValue(c.bf, "D");
+            dval = Double.parseDouble(val);
+            assert dval == d1 : "" + dval + " != " + d1;
+        }
+
+        for (int i = 0; i < 3; i++) {
+            int v1,v2;
+            double dval;
+            String val;
+            
+            v1 = RAND.nextInt(10);
+            v2 = RAND.nextInt(10);
+
+            a.press(c.bf, "C");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "-");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == v1 - v2;
+
+            System.out.println("Test M+ and MR");
+            a.press(c.bf, "C");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "M");
+            a.press(c.bf, "C");
+            a.press(c.bf, "R");
+            a.press(c.bf, "-");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == v1 - v2;
+
+            System.out.println("Test +/-");
+            a.press(c.bf, "C");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "?");
+            a.press(c.bf, "-");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == -v1 - v2;
+
+            a.press(c.bf, "C");
+            a.press(c.bf, "?");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "-");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == -v1 - v2;
+
+            a.press(c.bf, "C");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "-");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "?");
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == v1 + v2;
+
+            a.press(c.bf, "C");
+            a.press(c.bf, "" + v1);
+            a.press(c.bf, "-");
+            a.press(c.bf, "?");
+            a.press(c.bf, "" + v2);
+            a.press(c.bf, "=");
+            val = a.getValue(c.bf, "D");
+            System.out.println("val=" + val);
+            dval = Double.parseDouble(val);
+            assert dval == v1 + v2;
+        }
+
+        System.out.println("all tests passed");
+    }
+}

website/csc1351/05/Calculator.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package basicgraphics.calculator;
+
+import basicgraphics.BasicFrame;
+import java.awt.Font;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.text.DecimalFormat;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+
+/**
+ *
+ * @author sbrandt
+ */
+public class Calculator {
+    public final static String[][] layout = {
+        {"D","D","D","C"},
+        {"1","2","3","+"},
+        {"4","5","6","-"},
+        {"7","8","9","*"},
+        {"0",".","=","/"}
+    };
+    double value_, previousValue, memory;
+    String operator;
+    double decimal=1.0;
+    double sgn=1.0;
+    JLabel display = new JLabel("0",JLabel.CENTER);
+    public BasicFrame bf = new BasicFrame("Martian Calculator");
+    public double getValue() {
+        return value_ * sgn;
+    }
+    public void setValue(double v) {
+        if(v < 0) {
+            sgn = -1.0;
+            value_ = -v;
+        } else {
+            sgn = 1.0;
+            value_ = v;
+        }
+    }
+    
+    public void init() {
+        bf.add(layout,"D",display);
+        
+        for(int i=0;i<=9;i++) {
+            final int key = i;
+            JButton b = new JButton(""+i);
+            b.addActionListener(new ActionListener() {
+                @Override
+                public void actionPerformed(ActionEvent e) {
+                    if(decimal == 1.0) {
+                        value_ = 10*value_+key;
+                    } else {
+                        value_ = value_ + key*decimal;
+                        decimal *= 0.1;
+                    }
+                    update();
+                }
+            });
+            bf.add(layout, ""+i, b);
+        }
+        for(String s : new String[]{"+","-","/","*","="}) {
+            final String op = s;
+            JButton b = new JButton(op);
+            b.addActionListener(new ActionListener() {
+                @Override
+                public void actionPerformed(ActionEvent e) {
+                    if("=".equals(op)) {
+                        calc(operator);
+                        setValue(previousValue);
+                        operator = null;
+                    } else {
+                        previousValue = getValue();
+                        setValue(0.0);
+                        operator = op;
+                        sgn = 1.0;
+                    }
+                    decimal = 1.0;
+                    update();
+                }
+            });
+            bf.add(layout,op,b);
+        }
+        
+        // The text on the button is "Clr"
+        JButton clear = new JButton("Clr");
+        clear.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                setValue(0.0);
+                previousValue = 0;
+                operator = null;
+                decimal = 1.0;
+                update();
+            }
+        });
+        // The place of the button in the layout is
+        // given by "C".
+        bf.add(layout,"C",clear);
+        
+        JButton dot = new JButton(".");
+        dot.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                decimal *= .1;
+            }
+        });
+        bf.add(layout,".",dot);
+        
+        Font f = new Font("Courier",Font.BOLD,30);
+        bf.setAllFonts(f);
+        bf.show();
+    }
+    public void calc(String op) {
+        if ("+".equals(op)) {
+            previousValue = previousValue + getValue();
+        } else if ("-".equals(op)) {
+            previousValue = previousValue - getValue();
+        } else if ("*".equals(op)) {
+            previousValue = previousValue * getValue();
+        } else if ("/".equals(op)) {
+            previousValue = previousValue / getValue();
+        }
+    }
+    final static DecimalFormat df = new DecimalFormat("#.######");
+    public void update() {
+        if(operator == null) {
+            display.setText(df.format(getValue()));
+        } else {
+            display.setText(df.format(previousValue)+operator+df.format(getValue()));
+        }
+    }
+    public static void main(String[] args) {
+        Calculator c = new Calculator();
+        c.init();
+    }
+}

website/csc1351/05/MarsData.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package basicgraphics.calculator;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.URL;
+import java.util.Scanner;
+import java.util.regex.MatchResult;
+import java.util.regex.Pattern;
+
+/**
+ * This class fetches live data about Mars from the internet.
+ *
+ * @author sbrandt
+ */
+public class MarsData {
+
+    public double rightAscension;
+    public double declination;
+    public double sunDistance;
+    public double earthDistance;
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("MarsData{");
+        sb.append(String.format("rightAscension=%.6f,", rightAscension));
+        sb.append(String.format("declination=%.6f,", declination));
+        sb.append(String.format("sunDistance=%.6f,", sunDistance));
+        sb.append(String.format("earthDistance=%.6f", earthDistance));
+        sb.append("}");
+        return sb.toString();
+    }
+
+    public MarsData() {
+
+        try {
+            Pattern rightAscensionP = Pattern.compile("Right.*Ascension:.*>\\s*([-\\d.]+)\\s*<");
+            Pattern declinationP = Pattern.compile("Declination:.*>\\s*([-\\d.]+)\\s*<");
+            Pattern sunDistanceP = Pattern.compile("Sun.*Distance:.*>\\s*([-\\d.]+)\\s*<");
+            Pattern earthDistanceP = Pattern.compile("Earth.*Distance:.*>\\s*([-\\d.]+)\\s*<");
+            Scanner sc = null;
+
+            String info = System.getProperty("user.home", ".") + "/mars_info.txt";
+            File finfo = new File(info);
+            if (finfo.exists() && finfo.lastModified() + 10 * 60 * 1000 > System.currentTimeMillis()) {
+                sc = new Scanner(finfo);
+            } else {
+                URL url = new URL("https://theskylive.com/mars-tracker");
+                sc = new Scanner(url.openStream());
+            }
+            while (sc.hasNextLine()) {
+                if (sc.findInLine(rightAscensionP) != null) {
+                    MatchResult mr = sc.match();
+                    rightAscension = Double.parseDouble(mr.group(1));
+                }
+                if (sc.findInLine(declinationP) != null) {
+                    MatchResult mr = sc.match();
+                    declination = Double.parseDouble(mr.group(1));
+                }
+                if (sc.findInLine(sunDistanceP) != null) {
+                    MatchResult mr = sc.match();
+                    sunDistance = Double.parseDouble(mr.group(1));
+                }
+                if (sc.findInLine(earthDistanceP) != null) {
+                    MatchResult mr = sc.match();
+                    earthDistance = Double.parseDouble(mr.group(1));
+                }
+                sc.nextLine();
+            }
+            PrintWriter pw = new PrintWriter(finfo);
+            pw.printf("Right Ascension: >%f<%n",rightAscension);
+            pw.printf("Declination: >%f<%n",declination);
+            pw.printf("Earth Distance: >%f<%n",earthDistance);
+            pw.printf("Sun Distance: >%f<%n",sunDistance);
+            pw.close();
+        } catch (IOException ioe) {
+        }
+    }
+}

website/csc1351/index.php

@@ -64,6 +64,8 @@ Coding Bat: Arrays: You should be able to complete
   </ol>
 </li>
 
+<li><b>Exam 1:</b>
+    <a href="exam1.q.key.pdf">exam1.q.key.pdf</a>
 <li><b>Practice Exam 1:</b>
   <ol>
   <li><a href='exam1_noanswers.pdf'>Practice exam 1 without answers</a>,</li>