first commit

Semester 1/Programming 1/Java/examples/projects/chapter04/music-organizer-v1/MusicOrganizer.ctxt

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+#BlueJ class context
+comment0.params=
+comment0.target=MusicOrganizer()
+comment0.text=\n\ Create\ a\ MusicOrganizer\n
+comment1.params=filename
+comment1.target=void\ addFile(java.lang.String)
+comment1.text=\n\ Add\ a\ file\ to\ the\ collection.\n\ @param\ filename\ The\ file\ to\ be\ added.\n
+comment2.params=
+comment2.target=int\ getNumberOfFiles()
+comment2.text=\n\ Return\ the\ number\ of\ files\ in\ the\ collection.\n\ @return\ The\ number\ of\ files\ in\ the\ collection.\n
+comment3.params=index
+comment3.target=void\ listFile(int)
+comment3.text=\n\ List\ a\ file\ from\ the\ collection.\n\ @param\ index\ The\ index\ of\ the\ file\ to\ be\ listed.\n
+comment4.params=index
+comment4.target=void\ removeFile(int)
+comment4.text=\n\ Remove\ a\ file\ from\ the\ collection.\n\ @param\ index\ The\ index\ of\ the\ file\ to\ be\ removed.\n
+numComments=5

Semester 1/Programming 1/Java/examples/projects/chapter04/music-organizer-v1/MusicOrganizer.java

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+import java.util.ArrayList;
+
+/**
+ * A class to hold details of audio files.
+ * 
+ * @author David J. Barnes and Michael Kölling
+ * @version 2016.02.29
+ */
+public class MusicOrganizer
+{
+    // An ArrayList for storing the file names of music files.
+    private ArrayList<String> files;
+        
+    /**
+     * Create a MusicOrganizer
+     */
+    public MusicOrganizer()
+    {
+        files = new ArrayList<>();
+    }
+    
+    /**
+     * Add a file to the collection.
+     * @param filename The file to be added.
+     */
+    public void addFile(String filename)
+    {
+        files.add(filename);
+    }
+    
+    /**
+     * Return the number of files in the collection.
+     * @return The number of files in the collection.
+     */
+    public int getNumberOfFiles()
+    {
+        return files.size();
+    }
+    
+    /**
+     * List a file from the collection.
+     * @param index The index of the file to be listed.
+     */
+    public void listFile(int index)
+    {
+        if(index >= 0 && index < files.size()) {
+            String filename = files.get(index);
+            System.out.println(filename);
+        }
+    }
+    
+    /**
+     * Remove a file from the collection.
+     * @param index The index of the file to be removed.
+     */
+    public void removeFile(int index)
+    {
+        if(index >= 0 && index < files.size()) {
+            files.remove(index);
+        }
+    }
+}

Semester 1/Programming 1/Java/examples/projects/chapter04/music-organizer-v1/README.TXT

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+Project: music-organizer-v1. A project to collect audio files.
+Authors: David J. Barnes and Michael Kölling
+
+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
+
+It is discussed in chapter 4.
+
+To start:
+
+Create a MusicOrganizer object on the object bench.
+Use its methods to add, show, and remove files.
+

Semester 1/Programming 1/Java/examples/projects/chapter04/music-organizer-v1/package.bluej

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+#BlueJ package file
+objectbench.height=100
+objectbench.width=757
+package.editor.height=379
+package.editor.width=954
+package.editor.x=70
+package.editor.y=80
+package.numDependencies=0
+package.numTargets=1
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.editor.height=649
+readme.editor.width=817
+readme.editor.x=46
+readme.editor.y=23
+target1.editor.height=702
+target1.editor.width=785
+target1.editor.x=72
+target1.editor.y=84
+target1.height=60
+target1.name=MusicOrganizer
+target1.naviview.expanded=true
+target1.showInterface=false
+target1.type=ClassTarget
+target1.typeParameters=
+target1.width=120
+target1.x=180
+target1.y=110