LaunchCodeEducation · speudusa · Mar 8, 2022
diff --git a/src/org/launchcode/studio7/BaseDisc.java b/src/org/launchcode/studio7/BaseDisc.java
@@ -0,0 +1,48 @@
+package org.launchcode.studio7;
+import java.util.ArrayList;
+
+public abstract class BaseDisc {
+    private String name;
+    private int storageCapacity;
+    private int remainingCapacity;
+    private int capacityUsed;
+    private String diskType;
+    private ArrayList<String> contents;
+
+    public BaseDisc(String aName, int maxCapacity, String aType, int someUsedCapacity) {
+        name = aName;
+        storageCapacity = maxCapacity;
+        diskType = aType;
+        capacityUsed = checkCapacity(someUsedCapacity);
+        remainingCapacity = spaceLeft();
+    }
+
+    private int checkCapacity(int dataWritten) {
+        if (storageCapacity < dataWritten){
+            return storageCapacity;
+        }
+        return dataWritten;
+    }
+
+    private int spaceLeft(){
+        return storageCapacity - capacityUsed;
+    }
+
+    public String diskInfo(){
+        String output = String.format("\nDisk Name: %s\nMax capacity: %d" +
+                "\nSpace used: %d" +
+                "\nAvailable space: %d\n", name, storageCapacity, capacityUsed, remainingCapacity);
+        return output;
+    }
+
+    public String writeData(int dataSize){
+        if (dataSize > remainingCapacity){
+            return "Not enough disc space!";
+        }
+        capacityUsed += dataSize;
+        remainingCapacity -= dataSize;
+
+        return "Data written to disc.  Remaining space = " + remainingCapacity;
+    }
+
+}
diff --git a/src/org/launchcode/studio7/CD.java b/src/org/launchcode/studio7/CD.java
@@ -1,10 +1,18 @@
 package org.launchcode.studio7;
 
-public class CD {
+public class CD extends BaseDisc implements OpticalDisc{
 
-    // TODO: Implement your custom interface.
+    public CD(String aName, int maxCapacity, String aType, int someUsedCapacity){
+        super(aName, maxCapacity, aType, someUsedCapacity);
+    }
 
-    // TODO: Determine which fields, methods, and constructors can be extended from the base class and which ones
-    //  need to be declared separately.
+    @Override
+    public void spinDisc() {
+        System.out.println("A CD spins at a rate of 200 - 500 rpm.");
+    }
 
+    @Override
+    public void readData() {
+        System.out.println("Would you like to play a game?");
+    }
 }
diff --git a/src/org/launchcode/studio7/DVD.java b/src/org/launchcode/studio7/DVD.java
@@ -1,10 +1,22 @@
 package org.launchcode.studio7;
 
-public class DVD {
+public class DVD extends BaseDisc implements  OpticalDisc {
 
-    // TODO: Implement your custom interface.
+    public DVD(String aName, int maxCapacity, String aType, int someUsedCapacity) {
+        super(aName, maxCapacity, aType, someUsedCapacity);
+    }
+
+    @Override
+    public void spinDisc() {
+        System.out.println("A DVD spins at a rate of 570 - 1600 rpm.");
+    }
+
+    @Override
+    public void readData() {
+        System.out.println("I'm sorry, Dave. I'm afraid I can't do that.");
+    }
 
-    // TODO: Determine which fields, methods, and constructors can be extended from the base class and which ones
-    //  need to be declared separately.
 
 }
+
+
diff --git a/src/org/launchcode/studio7/Main.java b/src/org/launchcode/studio7/Main.java
@@ -4,9 +4,19 @@ public class Main {
 
     public static void main(String[] args){
 
-        // TODO: Declare and initialize a CD and a DVD object.
+        CD cd = new CD("CD Example", 700, "CD-R", 350);
+        DVD dvd = new DVD("DVD Example", 4700, "DVD-R", 1450);
 
-        // TODO: Call each CD and DVD method to verify that they work as expected.
+        cd.spinDisc();
+        dvd.spinDisc();
 
+        cd.readData();
+        dvd.readData();
+
+        System.out.println(cd.writeData(275));
+        System.out.println(dvd.writeData(8000));
+
+        System.out.println(cd.diskInfo());
+        System.out.println(dvd.diskInfo());
     }
 }
diff --git a/src/org/launchcode/studio7/OpticalDisc.java b/src/org/launchcode/studio7/OpticalDisc.java
@@ -0,0 +1,6 @@
+package org.launchcode.studio7;
+
+public interface OpticalDisc {
+    void spinDisc();
+    void readData();
+}