Markou is absolutely insane

Semester 4/EnumDemo/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>edu.slcc.asdv.caleb</groupId>
+    <artifactId>EnumDemo</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>20</maven.compiler.source>
+        <maven.compiler.target>20</maven.compiler.target>
+        <exec.mainClass>edu.slcc.asdv.caleb.enumdemo.EnumDemo</exec.mainClass>
+    </properties>
+</project>

Semester 4/EnumDemo/src/main/java/edu/slcc/asdv/caleb/enumdemo/EnumDemo.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ */
+
+package edu.slcc.asdv.caleb.enumdemo;
+
+/**
+ *
+ * @author caleb
+ */
+public class EnumDemo {
+    
+    public enum Day {
+    SUNDAY, MONDAY, TUESDAY, WEDNESDAY,
+    THURSDAY, FRIDAY, SATURDAY 
+}
+    Day day;
+
+    public EnumDemo(Day day)
+    {
+        this.day = day;
+    }
+    
+    
+        public void tellItLikeItIs() {
+        switch (day) {
+            case MONDAY:
+                System.out.println("Mondays are bad.");
+                break;
+                    
+            case FRIDAY:
+                System.out.println("Fridays are better.");
+                break;
+                         
+            case SATURDAY: case SUNDAY:
+                System.out.println("Weekends are best.");
+                break;
+                        
+            default:
+                System.out.println("Midweek days are so-so.");
+                break;
+        }
+    }
+        public static void main(String[] args)
+    {
+        EnumDemo day1 = new EnumDemo(Day.MONDAY);
+        day1.tellItLikeItIs();
+        EnumDemo day2 = new EnumDemo(Day.TUESDAY);
+        day2.tellItLikeItIs();
+        EnumDemo day3 = new EnumDemo(Day.WEDNESDAY);
+        day3.tellItLikeItIs();
+        EnumDemo day4 = new EnumDemo(Day.THURSDAY);
+        day4.tellItLikeItIs();
+        EnumDemo day5 = new EnumDemo(Day.FRIDAY);
+        day5.tellItLikeItIs();
+        
+    }
+    
+}

Semester 4/EnumDemo/src/main/java/edu/slcc/asdv/caleb/enumdemo/Planet.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package edu.slcc.asdv.caleb.enumdemo;
+
+/**
+ *
+ * @author caleb
+ */
+public enum Planet {
+    MERCURY(3.303e+23, 2.4397e6),
+    VENUS(4.869e+24, 6.0518e6),
+    EARTH(5.976e+24, 6.37814e6),
+    MARS(6.421e+23, 3.3972e6),
+    JUPITER(1.9e+27, 7.1492e7),
+    SATURN(5.688e+26, 6.0268e7),
+    URANUS(8.686e+25, 2.5559e7),
+    NEPTUNE(1.024e+26, 2.4746e7);
+
+    private final double mass;   // in kilograms
+    private final double radius; // in meters
+
+    Planet(double mass, double radius)
+    {
+        this.mass = mass;
+        this.radius = radius;
+    }
+
+    private double mass()
+    {
+        return mass;
+    }
+
+    private double radius()
+    {
+        return radius;
+    }
+
+    // universal gravitational constant  (m3 kg-1 s-2)
+    public static final double G = 6.67300E-11;
+
+    double surfaceGravity()
+    {
+        return G * mass / (radius * radius);
+    }
+
+    double surfaceWeight(double otherMass)
+    {
+        return otherMass * surfaceGravity();
+    }
+
+    public static void main(String[] args)
+    {
+        args = new String[1];
+        args[0] = "175";
+        if (args.length != 1) {
+            System.err.println("Usage: java Planet <earth_weight>");
+            System.exit(-1);
+        }
+        double earthWeight = Double.parseDouble(args[0]);
+        double mass = earthWeight / EARTH.surfaceGravity();
+        for (Planet p : Planet.values()) {
+            System.out.printf("Your weight on %s is %f%n",
+                    p, p.surfaceWeight(mass));
+        }
+    }
+
+}

Semester 4/EnumDemo/src/main/java/edu/slcc/asdv/caleb/enumdemo/TestPlanet.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package edu.slcc.asdv.caleb.enumdemo;
+
+/**
+ *
+ * @author caleb
+ */
+public class TestPlanet {
+    Planet planet;
+    
+    public TestPlanet(Planet planet) {
+        this.planet = planet;
+    }
+    public static void main(String[] args)
+    {
+        //TestPlanet testPlanet = new Planet.valueOf("EARTH");
+       // System.out.println(testPlanet.planet.EARTH);
+    }
+}

Semester 4/EnumDemo/src/main/java/singlenton/SingletonFlight.java

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+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package singlenton;
+
+import java.util.ArrayList;
+
+/**
+ *
+ * @author caleb
+ */
+public class SingletonFlight {
+    
+    private ArrayList<String> seats;
+    private static SingletonFlight instance;
+    
+    private SingletonFlight() {
+        seats = new ArrayList<String>(4);
+        
+    }
+    public static SingletonFlight getInstance() {
+        if (instance == null) {
+            instance = new SingletonFlight();
+        }
+        return instance;
+    }
+    
+    public boolean bookFlight(String nameOfPassenger) {
+        if (seats.size() > 4) {
+            System.out.println("Flight full!");
+            return false;
+        } else {
+            System.out.println("Added " + nameOfPassenger + " now has their seat booked.");
+            seats.add(nameOfPassenger);
+            return true;
+        }
+    }
+    public static void main(String[] args)
+    {
+        SingletonFlight passenger1 = SingletonFlight.getInstance();
+        SingletonFlight passenger2 = SingletonFlight.getInstance();
+        SingletonFlight passenger3 = SingletonFlight.getInstance();
+        SingletonFlight passenger4 = SingletonFlight.getInstance();
+        
+        passenger1.bookFlight("John Wayne");
+        passenger2.bookFlight("John Wayne Jr.");
+        passenger3.bookFlight("Joanne Wayne");
+        passenger4.bookFlight("Joseph Wayne");
+        passenger4.bookFlight("Jessica Wayne");
+    }
+    
+}