Erreurs lors de l'ajout d'une action à un bouton JFrame pour modifier une image précédemment sélectionnée

Question

J'essaye de créer un ImageEditor en Java, pour un projet d'école. Jusqu'à présent, j'ai réussi à faire avec JFrame le menu avec deux sous-menus: ouvert - où je peux rechercher une image et le voir dans la fenêtre principale; et effacer - où j'efface la fenêtre principale. Cette partie fonctionne bien. Dernièrement, j'ai ajouté aussi avec Jframe 4 boutons, afin d'éditer l'image et le rendre en niveaux de gris, en tons sépia, négatif ou rouge/vert/bleu.

Je suis toujours coincé au premier bouton où j'ai besoin de faire l'image dans les tons de gris. Je trouve l'algorithme, mais je ne sais pas comment puis-je me débarrasser de ce code erreurs.Procédé ressemble à ceci:

package myPackage; 
import javax.swing.*; 
import java.awt.image.BufferedImage; 
import java.io.IOException; 
import java.io.File; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import javax.swing.JButton; 
import javax.swing.JFrame; 


public class ImageEditor extends javax.swing.JFrame { 
    JFileChooser img = new JFileChooser(); 
    static BufferedImage image; 

public ImageEditor() { 
    initComponents(); 
} 
private ImageEditor(BufferedImage image) { 
    this.image = image; 
} 

private static void write(BufferedImage image, String jpg, JFileChooser img) { 
    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. 
} 

private static void write(BufferedImage image, String jpg, File f) { 
    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. 
} 

@SuppressWarnings("unchecked") 
// <editor-fold defaultstate="collapsed" desc="Generated Code">       
private void initComponents() { 

    jSP = new javax.swing.JScrollPane(); 
    jB_Greyscale = new javax.swing.JButton(); 
    jB_Sepia = new javax.swing.JButton(); 
    jB_RGB = new javax.swing.JButton(); 
    jB_Negative = new javax.swing.JButton(); 
    jMenuBar1 = new javax.swing.JMenuBar(); 
    jMenu1 = new javax.swing.JMenu(); 
    jMI_Open = new javax.swing.JMenuItem(); 
    jMI_Clear = new javax.swing.JMenuItem(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    jB_Greyscale.setText("Black & White"); 
    jB_Greyscale.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jB_GreyscaleActionPerformed(evt); 
     } 
    }); 

    jB_Sepia.setText("Sepia"); 

    jB_RGB.setText("Red/Green/Blue"); 

    jB_Negative.setText("Negative"); 

    jMenu1.setText("File"); 

    jMI_Open.setText("Open"); 
    jMI_Open.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jMI_OpenActionPerformed(evt); 
     } 
    }); 
    jMenu1.add(jMI_Open); 

    jMI_Clear.setText("Clear"); 
    jMI_Clear.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jMI_ClearActionPerformed(evt); 
     } 
    }); 
    jMenu1.add(jMI_Clear); 

    jMenuBar1.add(jMenu1); 

    setJMenuBar(jMenuBar1); 

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
    getContentPane().setLayout(layout); 
    layout.setHorizontalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
       .addComponent(jB_Greyscale, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jB_Sepia, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jB_RGB, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jB_Negative, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jSP, javax.swing.GroupLayout.DEFAULT_SIZE, 285, Short.MAX_VALUE)) 
    ); 
    layout.setVerticalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addComponent(jSP) 
     .addGroup(layout.createSequentialGroup() 
      .addComponent(jB_Greyscale) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jB_Sepia) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jB_RGB) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jB_Negative) 
      .addGap(0, 169, Short.MAX_VALUE)) 
    ); 

    pack(); 
}// </editor-fold>       


//Create a label 
JLabel jlab = new JLabel(); 
private void jMI_OpenActionPerformed(java.awt.event.ActionEvent evt) {           
    //Creez file chooser 
    JFileChooser jfc = new JFileChooser(); 
    //Selectez poza si o afisez 
    if(jfc.showOpenDialog(jMenu1) == JFileChooser.APPROVE_OPTION){ 
     //Select the path 
     java.io.File f = jfc.getSelectedFile(); 

     //Set icon 
     jlab.setIcon(new ImageIcon(f.toString())); 

     //Alignment 
     jlab.setHorizontalAlignment(JLabel.CENTER); 

     //Add label for jScrollPane 
     jSP.getViewport().add(jlab); 

     //Save image for futher edit 
     img = jfc; 
    } 
}           

private void jMI_ClearActionPerformed(java.awt.event.ActionEvent evt) {           
    //Clear image from jlabel jlab 
    jlab.setIcon(null); 
}           



private void jB_GreyscaleActionPerformed(java.awt.event.ActionEvent evt) {            
    //Get image dimension 
    ImageEditor.write(image,"jpg",img); 
    int width = image.getWidth(); 
    int height = image.getHeight(); 
    int p = 0, a, r, g, b, avg, y, x; 

    //Convert to grayscale 
    for(y = 0; y < height; y++){ 
     for(x = 0; x < width; x++) 
      p = image.getRGB(x,y); 
      a = (p >> 24)&0xff; 
      r = (p >> 16)&0xff; 
      g = (p >> 8)&0xff; 
      b = p >> 0xff; 

      //Calculate the average 
      avg = (r+g+b)/3; 

      //Replace RGB values with the average 
      p = (a << 24) | (avg << 16) | (avg << 8) | avg; 

      image.setRGB(x, y, p); 
    }  

    File f = new File("C:\\Users\\Iulia\\Grayscale.jpg"); 
    ImageEditor.write(image, "jpg", f); 
}            

public static void main(String args[]) { 
    try { 
     for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
      if ("Nimbus".equals(info.getName())) { 
       javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
       break; 
      } 
     } 
    } catch (ClassNotFoundException ex) { 
     java.util.logging.Logger.getLogger(ImageEditor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(ImageEditor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(ImageEditor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(ImageEditor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } 
    //</editor-fold> 

    /* Create and display the form */ 
    java.awt.EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      new ImageEditor().setVisible(true); 
     } 
    }); 

} 

// Variables declaration - do not modify      
private javax.swing.JButton jB_Greyscale; 
private javax.swing.JButton jB_Negative; 
private javax.swing.JButton jB_RGB; 
private javax.swing.JButton jB_Sepia; 
private javax.swing.JMenuItem jMI_Clear; 
private javax.swing.JMenuItem jMI_Open; 
private javax.swing.JMenu jMenu1; 
private javax.swing.JMenuBar jMenuBar1; 
private javax.swing.JScrollPane jSP; 
// End of variables declaration     
} 

Et l'erreur que je reçois quand je clique sur le bouton gris:

Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet. 
at myPackage.ImageEditor.write(ImageEditor.java:33) 
at myPackage.ImageEditor.jB_GreyscaleActionPerformed(ImageEditor.java:155) 
at myPackage.ImageEditor.access$000(ImageEditor.java:21) 
at myPackage.ImageEditor$1.actionPerformed(ImageEditor.java:59) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
at java.awt.Component.processMouseEvent(Component.java:6525) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) 
at java.awt.Component.processEvent(Component.java:6290) 
at java.awt.Container.processEvent(Container.java:2234) 
at java.awt.Component.dispatchEventImpl(Component.java:4881) 
at java.awt.Container.dispatchEventImpl(Container.java:2292) 
at java.awt.Component.dispatchEvent(Component.java:4703) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462) 
at java.awt.Container.dispatchEventImpl(Container.java:2278) 
at java.awt.Window.dispatchEventImpl(Window.java:2739) 
at java.awt.Component.dispatchEvent(Component.java:4703) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746) 
at java.awt.EventQueue.access$400(EventQueue.java:97) 
at java.awt.EventQueue$3.run(EventQueue.java:697) 
at java.awt.EventQueue$3.run(EventQueue.java:691) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) 
at java.awt.EventQueue$4.run(EventQueue.java:719) 
at java.awt.EventQueue$4.run(EventQueue.java:717) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:716) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) 

Answer 1

Supprimer cette ligne de vos fonctions

throw new UnsupportedOperationException("Not supported yet.");