Hi,
wir sollen einen Musikplayer programmieren, ich habe jedoch eine Exception bei der ich absolut null Plan haben, wie ich sie beheben könnte:
fromDirectory:
Artist:
wir sollen einen Musikplayer programmieren, ich habe jedoch eine Exception bei der ich absolut null Plan haben, wie ich sie beheben könnte:
Java:
Player initialized
java.lang.NullPointerException
at de.hofuniversity.soundmaster.data.Playlist.fromDirectory(Playlist.java:168)
at de.hofuniversity.soundmaster.Main.start(Main.java:35)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
fromDirectory:
Java:
public static Playlist fromDirectory(File dir)
{
Playlist p = new Playlist();
File[] files = dir.listFiles(new FilenameFilter()
{
@Override
public boolean accept(File dir, String name)
{
return name.toLowerCase().endsWith(".mp3");
}
});
for(File f : files)
{
try
{
AudioFile mp3 = AudioFileIO.read(f);
Title t = new Title(mp3.getTag().getFirstTitle(), new Artist(mp3.getTag().getFirstArtist()), mp3.getLength()*1000);
t.setFile(f);
p.add(t);
}
catch (Exception e)
{
e.printStackTrace();
}
}
return p;
}
Artist:
Code:
package de.hofuniversity.soundmaster.data;
public class Artist
{
private String surname, givenname;
private long birthdate;
public Artist(String firstArtist)
{
}
public String getSurname()
{
return surname;
}
public void setSurname(String surname)
{
this.surname = surname;
}
public String getGivenname()
{
return givenname;
}
public void setGivenname(String givenname)
{
this.givenname = givenname;
}
public long getBirthdate()
{
return birthdate;
}
public void setBirthDate(long birthdate)
{
this.birthdate = birthdate;
}
@Override
public String toString()
{
return "Artist [surname=" + surname + ", givenname=" + givenname + "]";
}
}