JPanel没有在JFrame中显示？
我使用JAudioTagger http://www.jthink.net/jaudiotagger/在Java中创建mp3Tagger应用 该应用程序实际上显示了轨道的标题，数字，专辑，艺术家，年份，流派和Metadatas中包含的评论。 它应该在主JFrame角落的JPanel上显示专辑的艺术作品......但它并没有。 我认为Jpanel不起作用：它既不显示JTextField也不显示Button ... 代码：
class JPanelArt extends JComponent {
private static final long serialVersionUID = 1L;
private Image image;
public JPanelArt() {
try {
image = ImageIO.read(new File("res/download.jpg"));
} catch (IOException e) {}
}
protected void paintComponent(Graphics g) {
if (image == null)
return;
g.drawImage(image, 0, 0, null);
}
}
帧类：
public class Mp3TaggerFrame extends JFrame {
private static final long serialVersionUID = 1L;
static AudioFile mp3;
private JPanel contentPane;
private JPanelArt albumArt;
private JLabel imageArt;
private JTextField titleTrack;
private JTextField artist;
private JTextField album;
private JTextField genre;
private JTextField trackNumber;
private JTextField lenght;
private JTextField year;
private JTextField comment;
private JTextField bitRate;
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("Mp3 File",
"mp3");
public void setAlbumArt(BufferedImage _image) {
}
public String getTitleTrack() {
return titleTrack.getText();
}
public void setTitleTrack(String title) {
this.titleTrack.setText(title);
}
public String getArtist() {
return artist.getText();
}
public void setArtist(String artist) {
this.artist.setText(artist);
}
public String getAlbum() {
return album.getText();
}
public void setAlbum(String album) {
this.album.setText(album);
}
public String getGenre() {
return genre.getText();
}
public void setGenre(String genre) {
this.genre.setText(genre);
}
public int getTrackNumber() {
return Integer.valueOf(trackNumber.getText());
}
public void setTrackNumber(String string) {
this.trackNumber.setText(string);
}
public void setLenght(int lenght) {
int min = 0;
int sec = lenght;
while (sec >= 60) {
sec = sec - 60;
min++;
}
this.lenght.setText(String.valueOf(min) + ":" + String.valueOf(sec));
}
public int getYear() {
return Integer.valueOf(year.getText());
}
public void setYear(String year) {
this.year.setText(year);
}
public String getComment() {
return comment.getText();
}
public void setComment(String comment) {
this.comment.setText(comment);
}
public String getBitRate() {
return bitRate.getText();
}
public void setBitRate(String bitRate) {
this.bitRate.setText(bitRate);
}
/**
* Create the frame.
*/
public Mp3TaggerFrame() {
try {
UIManager.setLookAndFeel(new SyntheticaBlackStarLookAndFeel());
} catch (Exception e) {
}
chooser.setFileFilter(filter);
setFont(new Font("Century Schoolbook", Font.PLAIN, 14));
setResizable(false);
setTitle("Mp3Tagger");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 562, 423);
setIconImage(new ImageIcon("res/Icon.png").getImage());
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem openMp3File = new JMenuItem("Open Mp3 File");
mnFile.add(openMp3File);
openMp3File.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
openFile();
}
});
JMenuItem saveWithNewTag = new JMenuItem("Save With New Tag");
mnFile.add(saveWithNewTag);
saveWithNewTag.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
saveFile();
}
});
JMenuItem mntmExit = new JMenuItem("Exit");
mnFile.add(mntmExit);
JMenu mnAbout = new JMenu("About");
menuBar.add(mnAbout);
JMenuItem mntmAboutTheProgram = new JMenuItem("About The Program");
mnAbout.add(mntmAboutTheProgram);
JMenuItem mntmContacts = new JMenuItem("Contacts");
mnAbout.add(mntmContacts);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblTitle = new JLabel("Title:");
lblTitle.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblTitle.setBounds(6, 6, 122, 28);
contentPane.add(lblTitle);
titleTrack = new JTextField();
titleTrack.setToolTipText("Title Of The Track");
titleTrack.setBounds(6, 32, 122, 28);
contentPane.add(titleTrack);
titleTrack.setColumns(10);
JLabel lblArtist = new JLabel("Artist:");
lblArtist.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblArtist.setBounds(6, 72, 122, 28);
contentPane.add(lblArtist);
artist = new JTextField();
artist.setToolTipText("Artist");
artist.setColumns(10);
artist.setBounds(6, 98, 122, 28);
contentPane.add(artist);
JLabel lblAlbum = new JLabel("Album:");
lblAlbum.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblAlbum.setBounds(6, 138, 122, 28);
contentPane.add(lblAlbum);
album = new JTextField();
album.setToolTipText("Album");
album.setColumns(10);
album.setBounds(6, 164, 122, 28);
contentPane.add(album);
JLabel lblGenre = new JLabel("Genre:");
lblGenre.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblGenre.setBounds(6, 270, 122, 28);
contentPane.add(lblGenre);
genre = new JTextField();
genre.setToolTipText("Genre Of The Track");
genre.setColumns(10);
genre.setBounds(6, 296, 122, 28);
contentPane.add(genre);
JLabel lblTrackNumber = new JLabel("Track Number:");
lblTrackNumber.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblTrackNumber.setBounds(6, 204, 122, 28);
contentPane.add(lblTrackNumber);
trackNumber = new JTextField();
trackNumber.setToolTipText("Number of the track in the album");
trackNumber.setColumns(10);
trackNumber.setBounds(6, 230, 122, 28);
contentPane.add(trackNumber);
JLabel lblAlbumArt = new JLabel("Album Art");
lblAlbumArt.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblAlbumArt.setBounds(375, 6, 73, 28);
contentPane.add(lblAlbumArt);
albumArt = new JPanelArt();
albumArt.setToolTipText("The Album Cover");
albumArt.setBounds(375, 192, 150, -150);
contentPane.add(albumArt);
JLabel lblLenght = new JLabel("Lenght");
lblLenght.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblLenght.setBounds(375, 204, 122, 28);
contentPane.add(lblLenght);
lenght = new JTextField();
lenght.setEditable(false);
lenght.setToolTipText("Lenght of the song");
lenght.setColumns(10);
lenght.setBounds(375, 230, 122, 28);
contentPane.add(lenght);
JButton editAlbumArt = new JButton("Edit");
editAlbumArt.setBounds(460, 6, 55, 28);
contentPane.add(editAlbumArt);
JLabel lblYear = new JLabel("Year:");
lblYear.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblYear.setBounds(181, 6, 122, 28);
contentPane.add(lblYear);
year = new JTextField();
year.setToolTipText("Year Of The Track");
year.setColumns(10);
year.setBounds(181, 32, 122, 28);
contentPane.add(year);
JLabel lblComments = new JLabel("Comments:");
lblComments.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblComments.setBounds(181, 72, 122, 28);
contentPane.add(lblComments);
comment = new JTextField();
comment.setToolTipText("Comments Of The Track");
comment.setColumns(10);
comment.setBounds(181, 98, 122, 160);
contentPane.add(comment);
JLabel lblBitrate = new JLabel("Bit Rate");
lblBitrate.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblBitrate.setBounds(375, 270, 122, 28);
contentPane.add(lblBitrate);
bitRate = new JTextField();
bitRate.setToolTipText("BitRate of the song");
bitRate.setEditable(false);
bitRate.setColumns(10);
bitRate.setBounds(375, 296, 122, 28);
contentPane.add(bitRate);
}
private void openFile() {
if (chooser.showOpenDialog(chooser) == JFileChooser.APPROVE_OPTION) {
try {
mp3 = AudioFileIO.read((new File(chooser.getSelectedFile()
.getAbsolutePath())));
} catch (CannotReadException | IOException | TagException
| ReadOnlyFileException | InvalidAudioFrameException e) {
e.printStackTrace();
}
} else
System.out.println("Nessun File Selezionato");
setTextFields();
}
private void setTextFields() {
Tag tag = mp3.getTag();
AudioHeader ah = mp3.getAudioHeader();
setTitleTrack(tag.getFirst(FieldKey.TITLE));
setAlbum(tag.getFirst(FieldKey.ALBUM));
setArtist(tag.getFirst(FieldKey.ARTIST));
setGenre(tag.getFirst(FieldKey.GENRE));
setTrackNumber(tag.getFirst(FieldKey.TRACK));
setLenght(ah.getTrackLength());
setYear(tag.getFirst(FieldKey.YEAR));
setComment(tag.getFirst(FieldKey.COMMENT));
setBitRate(ah.getBitRate() + "Kbs");
try {
setAlbumArt((BufferedImage) tag.getFirstArtwork().getImage());
} catch (IOException e) {
e.printStackTrace();
}
}
private void saveFile() {
}
}
2 个答案:
答案 0 :(得分：3)
你如何制作节目？我仍然无法看到小组..
我做了一些更改，但是在（开始）制作MCVE的过程中，我得到了这个代码来制作上面的图像。
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
public class Mp3TaggerFrame extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JPanel albumArt;
private JLabel imageArt;
private JTextField titleTrack;
private JTextField artist;
private JTextField album;
private JTextField genre;
private JTextField trackNumber;
private JTextField lenght;
private JTextField year;
private JTextField comment;
private JTextField bitRate;
public static void main(String[] args) {
new Mp3TaggerFrame().setVisible(true);
}
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("Mp3 File",
"mp3");
public void setAlbumArt(BufferedImage _image) {
}
public String getTitleTrack() {
return titleTrack.getText();
}
public void setTitleTrack(String title) {
this.titleTrack.setText(title);
}
public String getArtist() {
return artist.getText();
}
public void setArtist(String artist) {
this.artist.setText(artist);
}
public String getAlbum() {
return album.getText();
}
public void setAlbum(String album) {
this.album.setText(album);
}
public String getGenre() {
return genre.getText();
}
public void setGenre(String genre) {
this.genre.setText(genre);
}
public int getTrackNumber() {
return Integer.valueOf(trackNumber.getText());
}
public void setTrackNumber(String string) {
this.trackNumber.setText(string);
}
public void setLenght(int lenght) {
int min = 0;
int sec = lenght;
while (sec >= 60) {
sec = sec - 60;
min++;
}
this.lenght.setText(String.valueOf(min) + ":" + String.valueOf(sec));
}
public int getYear() {
return Integer.valueOf(year.getText());
}
public void setYear(String year) {
this.year.setText(year);
}
public String getComment() {
return comment.getText();
}
public void setComment(String comment) {
this.comment.setText(comment);
}
public String getBitRate() {
return bitRate.getText();
}
public void setBitRate(String bitRate) {
this.bitRate.setText(bitRate);
}
/**
* Create the frame.
*/
public Mp3TaggerFrame() {
chooser.setFileFilter(filter);
setFont(new Font("Century Schoolbook", Font.PLAIN, 14));
setResizable(false);
setTitle("Mp3Tagger");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 562, 423);
setIconImage(new ImageIcon("res/Icon.png").getImage());
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem openMp3File = new JMenuItem("Open Mp3 File");
mnFile.add(openMp3File);
openMp3File.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
openFile();
}
});
JMenuItem saveWithNewTag = new JMenuItem("Save With New Tag");
mnFile.add(saveWithNewTag);
saveWithNewTag.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
saveFile();
}
});
JMenuItem mntmExit = new JMenuItem("Exit");
mnFile.add(mntmExit);
JMenu mnAbout = new JMenu("About");
menuBar.add(mnAbout);
JMenuItem mntmAboutTheProgram = new JMenuItem("About The Program");
mnAbout.add(mntmAboutTheProgram);
JMenuItem mntmContacts = new JMenuItem("Contacts");
mnAbout.add(mntmContacts);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblTitle = new JLabel("Title:");
lblTitle.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblTitle.setBounds(6, 6, 122, 28);
contentPane.add(lblTitle);
titleTrack = new JTextField();
titleTrack.setToolTipText("Title Of The Track");
titleTrack.setBounds(6, 32, 122, 28);
contentPane.add(titleTrack);
titleTrack.setColumns(10);
JLabel lblArtist = new JLabel("Artist:");
lblArtist.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblArtist.setBounds(6, 72, 122, 28);
contentPane.add(lblArtist);
artist = new JTextField();
artist.setToolTipText("Artist");
artist.setColumns(10);
artist.setBounds(6, 98, 122, 28);
contentPane.add(artist);
JLabel lblAlbum = new JLabel("Album:");
lblAlbum.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblAlbum.setBounds(6, 138, 122, 28);
contentPane.add(lblAlbum);
album = new JTextField();
album.setToolTipText("Album");
album.setColumns(10);
album.setBounds(6, 164, 122, 28);
contentPane.add(album);
JLabel lblGenre = new JLabel("Genre:");
lblGenre.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblGenre.setBounds(6, 270, 122, 28);
contentPane.add(lblGenre);
genre = new JTextField();
genre.setToolTipText("Genre Of The Track");
genre.setColumns(10);
genre.setBounds(6, 296, 122, 28);
contentPane.add(genre);
JLabel lblTrackNumber = new JLabel("Track Number:");
lblTrackNumber.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblTrackNumber.setBounds(6, 204, 122, 28);
contentPane.add(lblTrackNumber);
trackNumber = new JTextField();
trackNumber.setToolTipText("Number of the track in the album");
trackNumber.setColumns(10);
trackNumber.setBounds(6, 230, 122, 28);
contentPane.add(trackNumber);
JLabel lblAlbumArt = new JLabel("Album Art");
lblAlbumArt.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblAlbumArt.setBounds(375, 6, 73, 28);
contentPane.add(lblAlbumArt);
albumArt = new JPanel();
BufferedImage bi = new BufferedImage(150,150,BufferedImage.TYPE_INT_RGB);
albumArt.add(new JLabel(new ImageIcon(bi)));
albumArt.setToolTipText("The Album Cover");
albumArt.setBounds(375, 42, 150, 150);
contentPane.add(albumArt);
JLabel lblLenght = new JLabel("Lenght");
lblLenght.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblLenght.setBounds(375, 204, 122, 28);
contentPane.add(lblLenght);
lenght = new JTextField();
lenght.setEditable(false);
lenght.setToolTipText("Lenght of the song");
lenght.setColumns(10);
lenght.setBounds(375, 230, 122, 28);
contentPane.add(lenght);
JButton editAlbumArt = new JButton("Edit");
editAlbumArt.setBounds(460, 6, 55, 28);
contentPane.add(editAlbumArt);
JLabel lblYear = new JLabel("Year:");
lblYear.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblYear.setBounds(181, 6, 122, 28);
contentPane.add(lblYear);
year = new JTextField();
year.setToolTipText("Year Of The Track");
year.setColumns(10);
year.setBounds(181, 32, 122, 28);
contentPane.add(year);
JLabel lblComments = new JLabel("Comments:");
lblComments.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblComments.setBounds(181, 72, 122, 28);
contentPane.add(lblComments);
comment = new JTextField();
comment.setToolTipText("Comments Of The Track");
comment.setColumns(10);
comment.setBounds(181, 98, 122, 160);
contentPane.add(comment);
JLabel lblBitrate = new JLabel("Bit Rate");
lblBitrate.setFont(new Font("DokChampa", Font.PLAIN, 15));
lblBitrate.setBounds(375, 270, 122, 28);
contentPane.add(lblBitrate);
bitRate = new JTextField();
bitRate.setToolTipText("BitRate of the song");
bitRate.setEditable(false);
bitRate.setColumns(10);
bitRate.setBounds(375, 296, 122, 28);
contentPane.add(bitRate);
}
private void openFile() {
}
private void setTextFields() {
}
private void saveFile() {
}
}
答案 1 :(得分：0)
请注意，JPanelArt是一个JComponent而不是JFrame。该定义声明“op-level Swing容器 - 例如JFrame，JDialog和JApplet - 是专门为其他Swing组件绘制自己的地方的组件”。您可以尝试两种解决方案：
- 使JPanelArt扩展
JPanel，而不是JComponent。 - 在
Mp3TaggerFrame课程中加入JPanel，在Mp3TaggerFrame构造函数中包含创建代码，在paint()Mp3TaggerFrame方法中包含绘图部分（在这种情况下，你必须要包含一些getGraphics才能获得面板图形。）
我希望它有所帮助。
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？