Initial commit

build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="Playlist" default="default" basedir=".">
+    <description>Builds, tests, and runs the project Playlist.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="Playlist-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

build/built-jar.properties

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+#Fri, 31 Jan 2025 01:21:27 +0100
+
+
+/home/blackilykat/NetbeansProjects/school/Playlist=

manifest.mf

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+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

nbproject/genfiles.properties

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+build.xml.data.CRC32=e8bcf82c
+build.xml.script.CRC32=63f50820
+build.xml.stylesheet.CRC32=f85dc8f2@1.111.0.48
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=e8bcf82c
+nbproject/build-impl.xml.script.CRC32=f108b4e2
+nbproject/build-impl.xml.stylesheet.CRC32=12e0a6c2@1.111.0.48

nbproject/private/private.properties

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+compile.on.save=true
+user.properties.file=/home/blackilykat/.netbeans/dev/build.properties

nbproject/private/private.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project-private xmlns="http://www.netbeans.org/ns/project-private/1">
+    <editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
+    <open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
+        <group>
+            <file>file:/home/blackilykat/NetbeansProjects/school/Playlist/src/Playlist.java</file>
+            <file>file:/home/blackilykat/NetbeansProjects/school/Playlist/src/Brano.java</file>
+            <file>file:/home/blackilykat/NetbeansProjects/school/Playlist/src/Main.java</file>
+            <file>file:/home/blackilykat/NetbeansProjects/school/Playlist/src/Artista.java</file>
+        </group>
+    </open-files>
+</project-private>

nbproject/project.properties

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+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processor.options=
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.modulepath=\
+    ${run.modulepath}
+debug.test.classpath=\
+    ${run.test.classpath}
+debug.test.modulepath=\
+    ${run.test.modulepath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/Playlist.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+dist.jlink.dir=${dist.dir}/jlink
+dist.jlink.output=${dist.jlink.dir}/Playlist
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.external.vm=true
+javac.modulepath=
+javac.processormodulepath=
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=23
+javac.target=23
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.modulepath=\
+    ${javac.modulepath}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.html5=false
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+# The jlink additional root modules to resolve
+jlink.additionalmodules=
+# The jlink additional command line parameters
+jlink.additionalparam=
+jlink.launcher=true
+jlink.launcher.name=Playlist
+main.class=Main
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.modulepath=\
+    ${javac.modulepath}
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+run.test.modulepath=\
+    ${javac.test.modulepath}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

nbproject/project.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>Playlist</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+    </configuration>
+</project>

src/Artista.java

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+public class Artista {
+    public final String nome;
+    public final int annoNascita;
+    public final String nazionalita;
+
+    public Artista(String nome, int annoNascita, String nazionalita) {
+        this.nome = nome;
+        this.annoNascita = annoNascita;
+        this.nazionalita = nazionalita;
+    }
+
+    @Override
+    public String toString() {
+        // anno di nascita negativo se non si sa
+        return annoNascita < 0 ? String.format("%s (%s)", nome, nazionalita) : String.format("%s (%d, %s)", nome, annoNascita, nazionalita);
+    }
+}

src/Brano.java

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+
+import java.util.Arrays;
+
+public class Brano {
+    public final String titolo;
+    public final String genere;
+    // Durata in secondi
+    public final int durata;
+    public final Artista[] artisti;
+
+    public Brano(String titolo, String genere, int minuti, int secondi, Artista... artisti) {
+        this(titolo, genere, minuti * 60 + secondi, artisti);
+    }
+
+    public Brano(String titolo, String genere, int durata, Artista... artisti) {
+        if(artisti.length > 5) {
+            throw new IllegalArgumentException("Un brano non può avere più di 5 artisti");
+        }
+        if(durata < 0) {
+            throw new IllegalArgumentException("Un brano non può avere durata negativa");
+        }
+        this.titolo = titolo;
+        this.genere = genere;
+        this.durata = durata;
+        this.artisti = artisti;
+    }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "(%s, %d:%02d) \"%s\" - %s",
+                genere,
+                durata / 60,
+                durata % 60,
+                titolo,
+                String.join(", ", Arrays.stream(artisti).map(artista -> artista.toString()).toList())
+        );
+    }
+    
+}

src/Main.java

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+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.SpringLayout;
+
+import java.awt.Container;
+import java.awt.Dimension;
+
+public class Main {
+    public static void main(String[] args) {
+        Artista ivycomb = new Artista("ivycomb", 2000, "Canada");
+        Artista stephanafro = new Artista("Stephanafro", -1, "USA");
+        Brano pennyPinched = new Brano("Penny Pinched", "pop", 2, 15, ivycomb, stephanafro);
+        Brano vancouver = new Brano("Vancouver", "pop", 3, 42, ivycomb, stephanafro);
+        Brano terminal18 = new Brano("Terminal 18", "pop", 3, 49, ivycomb, stephanafro);
+
+        Playlist playlist = new Playlist(pennyPinched, vancouver, terminal18);
+
+        Artista caparezza = new Artista("Caparezza", 1973, "Italia");
+        Artista diegoPerrone = new Artista("Diego Perrone", 1975, "Italia");
+        Brano faiDaTela = new Brano("Fai Da Tela", "hip hop", 3, 59, caparezza, diegoPerrone);
+        Brano micaVanGogh = new Brano("Mica Van Gogh", "hip hop", 3, 55, caparezza);
+        Brano nonMeLoPossoPermettere = new Brano("Non me lo posso permettere", "hip hop", 3, 46, caparezza);
+
+        playlist.aggiungiInCoda(faiDaTela);
+        playlist.aggiungiInCoda(micaVanGogh);
+        playlist.aggiungiInCoda(nonMeLoPossoPermettere);
+
+        JFrame frame = new JFrame("Playlist");
+        frame.setSize(new Dimension(500, 250));
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        SpringLayout layout = new SpringLayout();
+        frame.setLayout(layout);
+
+        JLabel testoBranoCorrente = new JLabel(playlist.corrente().toString());
+        frame.add(testoBranoCorrente);
+
+        JButton bottoneProssimo = new JButton("Prossimo");
+        bottoneProssimo.addActionListener(e -> {
+            if(e.getSource() != bottoneProssimo) return;
+            Brano nuovoBrano = playlist.prossimo();
+            if(nuovoBrano != null) {
+                testoBranoCorrente.setText(nuovoBrano.toString());
+            }
+        });
+        frame.add(bottoneProssimo);
+
+        JButton bottonePrecedente = new JButton("Precedente");
+        bottonePrecedente.addActionListener(e -> {
+            if(e.getSource() != bottonePrecedente) return;
+            Brano nuovoBrano = playlist.precedente();
+            if(nuovoBrano != null) {
+                testoBranoCorrente.setText(nuovoBrano.toString());
+            }
+        });
+        frame.add(bottonePrecedente);
+
+        JCheckBox opzioneShuffle = new JCheckBox("Shuffle");
+        opzioneShuffle.addActionListener(e -> {
+            if(e.getSource() != opzioneShuffle) return;
+            playlist.shuffle(opzioneShuffle.isSelected());
+        });
+        frame.add(opzioneShuffle);
+
+        JCheckBox opzioneRepeat = new JCheckBox("Repeat");
+        opzioneRepeat.addActionListener(e -> {
+            if(e.getSource() != opzioneRepeat) return;
+            playlist.repeat(opzioneRepeat.isSelected());
+        });
+        frame.add(opzioneRepeat);
+
+        Container contentPane = frame.getContentPane();
+
+        layout.putConstraint(SpringLayout.NORTH, testoBranoCorrente, 50, SpringLayout.NORTH, contentPane);
+        layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, testoBranoCorrente, 0, SpringLayout.HORIZONTAL_CENTER, contentPane);
+
+        layout.putConstraint(SpringLayout.NORTH, bottonePrecedente, 20, SpringLayout.SOUTH, testoBranoCorrente);
+        layout.putConstraint(SpringLayout.EAST, bottonePrecedente, 0, SpringLayout.HORIZONTAL_CENTER, contentPane);
+
+        layout.putConstraint(SpringLayout.NORTH, bottoneProssimo, 0, SpringLayout.NORTH, bottonePrecedente);
+        layout.putConstraint(SpringLayout.WEST, bottoneProssimo, 0, SpringLayout.EAST, bottonePrecedente);
+
+        layout.putConstraint(SpringLayout.NORTH, opzioneRepeat, 10, SpringLayout.SOUTH, bottonePrecedente);
+        layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, opzioneRepeat, 0, SpringLayout.HORIZONTAL_CENTER, contentPane);
+
+        layout.putConstraint(SpringLayout.NORTH, opzioneShuffle, 10, SpringLayout.SOUTH, opzioneRepeat);
+        layout.putConstraint(SpringLayout.HORIZONTAL_CENTER, opzioneShuffle, 0, SpringLayout.HORIZONTAL_CENTER, contentPane);
+
+        frame.setVisible(true);
+    }
+    
+}

src/Playlist.java

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+import java.util.Random;
+
+public class Playlist {
+    private Nodo<Brano> corrente = null;
+    private Nodo<Brano> testa = null;
+    private Nodo<Brano> coda = null;
+    private boolean shuffle = false;
+    private Random random = null;
+    private Nodo<Nodo<Brano>> pilaPrecedenti = null;
+    private Nodo<Nodo<Brano>> pilaProssimi = null;
+    private int dimensione = 0;
+
+    public Playlist(Brano... brani) {
+        for(Brano brano : brani) {
+            if(brano == null) continue;
+            aggiungiInCoda(brano);
+        }
+    }
+
+    public void aggiungiInCoda(Brano brano) {
+        dimensione++;
+        if(corrente != null) {
+            Nodo<Brano> cursore = corrente;
+            while(cursore.prossimo != null) cursore = cursore.prossimo;
+            cursore.prossimo = new Nodo<Brano>(brano);
+            cursore.prossimo.precedente = cursore;
+            coda = cursore.prossimo;
+        } else {
+            corrente = new Nodo<Brano>(brano);
+            testa = corrente;
+            coda = corrente;
+        }
+    }
+
+    private Nodo<Brano> branoCasuale() {
+        Nodo<Brano> cursore = testa;
+        if(random == null) random = new Random();
+        int pos = random.nextInt(0, dimensione);
+        for(int i = 0; i < pos; i++) {
+            cursore = cursore.prossimo;
+        }
+        return cursore;
+    }
+
+    public Brano precedente() {
+        if(dimensione == 0) return null;
+
+
+        if(pilaPrecedenti != null) {
+            aggiungiInProssimi(corrente);
+            corrente = pilaPrecedenti.valore;
+            pilaPrecedenti = pilaPrecedenti.prossimo;
+            if(pilaPrecedenti != null) {
+                pilaPrecedenti.precedente = null;
+            }
+            return corrente.valore;
+        }
+
+        if(shuffle) {
+            aggiungiInProssimi(corrente);
+            corrente = branoCasuale();
+            return corrente.valore;
+        }
+
+        if(corrente == null || corrente.precedente == null) return null;
+        aggiungiInProssimi(corrente);
+        corrente = corrente.precedente;
+        return corrente.valore;
+    }
+
+    private void aggiungiInProssimi(Nodo<Brano> nodo) {
+        Nodo<Nodo<Brano>> nuovoProssimo = new Nodo<Nodo<Brano>>(nodo);
+        if(pilaProssimi != null) {
+            nuovoProssimo.prossimo = pilaProssimi;
+            nuovoProssimo.prossimo.precedente = nuovoProssimo;
+        }
+        pilaProssimi = nuovoProssimo;
+    }
+
+    public Brano corrente() {
+        if(corrente == null) return null;
+        return corrente.valore;
+    }
+ 
+    public Brano prossimo() {
+        if(dimensione == 0) return null;
+
+        if(pilaProssimi != null) {
+            aggiungiInPrecedenti(corrente);
+            corrente = pilaProssimi.valore;
+            pilaProssimi = pilaProssimi.prossimo;
+            if(pilaProssimi != null) {
+                pilaProssimi.precedente = null;
+            }
+            return corrente.valore;
+        }
+
+        if(shuffle) {
+            aggiungiInPrecedenti(corrente);
+            corrente = branoCasuale();
+            return corrente.valore;
+        }
+
+        if(corrente == null || corrente.prossimo == null) return null;
+        aggiungiInPrecedenti(corrente);
+        corrente = corrente.prossimo;
+        return corrente.valore;
+    }
+
+    private void aggiungiInPrecedenti(Nodo<Brano> nodo) {
+        Nodo<Nodo<Brano>> nuovoPrecedente = new Nodo<Nodo<Brano>>(corrente);
+        if(pilaPrecedenti != null) {
+            nuovoPrecedente.prossimo = pilaPrecedenti;
+            nuovoPrecedente.prossimo.precedente = nuovoPrecedente;
+        }
+        pilaPrecedenti = nuovoPrecedente;
+    }
+
+    public void repeat(boolean abilitato) {
+        // In un contesto reale non modificherei la lista in se ma cambierei la logica solo
+        // quando devo selezionare la traccia successiva o precedente. Per scopi didattici,
+        // rendo la lista una lista circolare.
+        if(abilitato) {
+            testa.precedente = coda;
+            coda.prossimo = testa;
+        } else {
+            testa.precedente = null;
+            coda.prossimo = null;
+        }
+        System.out.println("Repeat: " + abilitato);
+    }
+
+    public void shuffle(boolean abilitato) {
+        shuffle = abilitato;
+        System.out.println("Shuffle: " + abilitato);
+    }
+
+    private class Nodo<T> {
+        public T valore;
+        public Nodo<T> prossimo;
+        public Nodo<T> precedente;
+
+        public Nodo(T valore) {
+            this.valore = valore;
+        }
+    }
+}