Grop probleme avec mon JButton
bonsoir,
je n'arrive pas a savoir pourquoi que lors de la validation (lorsque je clique sur mon button) j'ai une erreur de compilation , ma premiere version de mon ihm était cree dans une seule methode et ça fonctionné bien .ma seconde version de mon ihm a était cree en deux methodes et la j'ai une erreur de compilation .
voici mon code premier methode
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| public void IHMArticle ()
{
ListEntreprise = new JList(Ventreprise);
ListCategorie =new JList(Vcategorie);
ListSCategorie =new JList(Vscategorie);
ListArticle =new JList(Varticle);
try{
Class.forName("com.mysql.jdbc.Driver");
System.out.println("JDBC Load categorie ok");
}
catch (ClassNotFoundException e1)
{
System.out.println(e1);
}
try{
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost/Ecommerce","root","");
System.out.println("bonne connexion 2");
String Sql="SELECT nomentreprise FROM Entreprise";
Statement st=con.createStatement();
ResultSet resul=st.executeQuery(Sql);
while(resul.next())
{
Ventreprise.addElement(new String(resul.getString("nomentreprise")));
}
ListEntreprise.setListData(Ventreprise);
String SQl="SELECT nomcategorie FROM Categorie ";
Vcategorie.clear();
resul=st.executeQuery(SQl);
while (resul.next())
{
Vcategorie.addElement(new String(resul.getString("nomcategorie")));
}
ListCategorie.setListData(Vcategorie);
String SQLE="SELECT idcategorie FROM Categorie where nomcategorie='"+NomCategorie+"'";
resul =st.executeQuery(SQLE);
if(resul.next())
{
idcategorie=resul.getInt("idcategorie");
}
System.out.println(idcategorie);
String SQL ="SELECT nomsouscategorie FROM Souscategorie WHERE idcategorie="+idcategorie;
resul =st.executeQuery(SQL);
while (resul.next())
{
Vscategorie.addElement(new String(resul.getString("nomsouscategorie")));
}
ListSCategorie.setListData(Vscategorie);
resul.close();
st.close();
con.close();
System.out.println("Element inserer reussi !!");
}catch (SQLException x)
{
System.out.println(x);
}
setSize (700,550);
Container Co =this.getContentPane();
Co.setLayout(new BorderLayout());
JPanel panel_nord =new JPanel();
JLabel titre =new JLabel("Fiche Article");
panel_nord.add(titre);
Co.add(BorderLayout.NORTH,panel_nord);
JPanel panel_centre_article =new JPanel();
panel_centre_article.setLayout(new GridLayout(3,4));
JPanel panel_grid_article1 =new JPanel();
JLabel entreprise =new JLabel("Entreprise");
panel_grid_article1.add(entreprise);
panel_centre_article.add(panel_grid_article1);
JPanel panel_grid_article2 =new JPanel();
Text_entreprise =new JTextField(10);
panel_grid_article2.add(Text_entreprise);
panel_centre_article.add(panel_grid_article2);
JPanel panel_grid_article3 =new JPanel();
ListEntreprise.addListSelectionListener(this);
JScrollPane Scroll_entreprise =new JScrollPane(ListEntreprise);
Scroll_entreprise.setPreferredSize(new Dimension (150,150));
Scroll_entreprise.setPreferredSize(new Dimension (150,150));
panel_grid_article3.add(Scroll_entreprise);
panel_centre_article.add(panel_grid_article3);
JPanel panel_grid_article4 =new JPanel();
JButton But_entreprise =new JButton("Creer Entreprise");
But_entreprise.addActionListener(this);
panel_grid_article4.add(But_entreprise);
panel_centre_article.add(panel_grid_article4);
JPanel panel_grid_article5 =new JPanel();
JLabel categorie =new JLabel("Categorie");
panel_grid_article5.add(categorie);
panel_centre_article.add(panel_grid_article5);
JPanel panel_grid_article6 =new JPanel();
Text_categorie =new JTextField(10);
panel_grid_article6.add(Text_categorie );
panel_centre_article.add(panel_grid_article6);
JPanel panel_grid_article7 =new JPanel();
ListCategorie.addListSelectionListener(this);
JScrollPane Scroll_categorie =new JScrollPane(ListCategorie);
Scroll_categorie.setPreferredSize(new Dimension(150,150));
panel_grid_article7.add(Scroll_categorie);
panel_centre_article.add(panel_grid_article7);
JPanel panel_grid_article8 =new JPanel();
JButton But_categorie =new JButton("Creer Categorie");
panel_grid_article8.add(But_categorie);
panel_centre_article.add(panel_grid_article8);
JPanel panel_grid_article9 =new JPanel();
JLabel sous_categorie =new JLabel("Sous Categorie");
panel_grid_article9.add(sous_categorie);
panel_centre_article.add(panel_grid_article9);
JPanel panel_grid_article10 =new JPanel();
Text_sous_categorie =new JTextField(10);
panel_grid_article10 .add(Text_sous_categorie);
panel_centre_article.add(panel_grid_article10);
JPanel panel_grid_article11 =new JPanel();
ListSCategorie.addListSelectionListener(this);
JScrollPane Scroll_sous_categorie =new JScrollPane(ListSCategorie);
Scroll_sous_categorie.setPreferredSize(new Dimension (150,150));
panel_grid_article11.add(Scroll_sous_categorie);
panel_centre_article.add(panel_grid_article11);
JPanel panel_grid_article12 =new JPanel();
JButton But_sous_categorie =new JButton("Creer Sous Categorie");
panel_grid_article12.add(But_sous_categorie);
panel_centre_article.add(panel_grid_article12);
Co.add(BorderLayout.CENTER,panel_centre_article);
} |
seconde methode
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| public void IHMARtcle()
{
setSize (700,550);
Container Co =this.getContentPane();
Co.setLayout(new BorderLayout());
JPanel Panel_centre =new JPanel();
Panel_centre.setLayout(new GridLayout(5,1));
JPanel panel_grid_article13 =new JPanel();
panel_grid_article13.setLayout(new FlowLayout());
JLabel nomarticle =new JLabel("Nom De l'Article");
panel_grid_article13.add(nomarticle);
Text_nom_article =new JTextField(10);
panel_grid_article13.add(Text_nom_article);
ListArticle.addListSelectionListener(this);
JScrollPane Pane_Article =new JScrollPane(ListArticle);
Pane_Article.setPreferredSize(new Dimension (150,150));
panel_grid_article13.add(Pane_Article);
Panel_centre.add(panel_grid_article13);
JPanel panel_grid_article17 =new JPanel();
panel_grid_article17.setLayout(new FlowLayout());
JLabel description1 =new JLabel("Description");
panel_grid_article17.add(description1);
Text_description1 =new JTextField(40);
panel_grid_article17.add(Text_description1);
Panel_centre.add(panel_grid_article17);
;
JPanel panel_grid_article25 =new JPanel();
panel_grid_article25.setLayout(new FlowLayout());
JLabel description2 =new JLabel("Description");
panel_grid_article25.add(description2);
Text_description2 =new JTextField(40);
panel_grid_article25.add(Text_description2);
Panel_centre.add(panel_grid_article25);
JPanel panel_grid_article33 =new JPanel();
panel_grid_article33.setLayout(new FlowLayout());
JLabel description3=new JLabel("Description");
panel_grid_article33.add(description3 );
Text_description3 =new JTextField(40);
panel_grid_article33.add(Text_description3);
Panel_centre.add(panel_grid_article33);
JPanel panel_grid_article41 =new JPanel();
panel_grid_article41.setLayout(new FlowLayout());
JLabel prixtotal =new JLabel("Prix Article");
panel_grid_article41.add(prixtotal);
Text_prix =new JTextField(15);
panel_grid_article41.add(Text_prix);
JLabel image =new JLabel("Nom De L'image");
panel_grid_article41.add(image);
Text_image =new JTextField(15);
panel_grid_article41.add(Text_image);
Panel_centre.add(panel_grid_article41);
Co.add(BorderLayout.CENTER,Panel_centre);
JPanel panel_sud_article =new JPanel();
panel_sud_article.setLayout(new FlowLayout());
JPanel flow_sud =new JPanel();
Butvalider =new JButton("Valider");
Butvalider.addActionListener(this);
flow_sud.add(Butvalider);
Butmodifier =new JButton("Modifier");
Butmodifier.addActionListener(this);
flow_sud.add(Butmodifier);
JButton Butannuler =new JButton("Annuler");
flow_sud.add(Butannuler);
JButton Butterminer =new JButton("Terminer");
flow_sud.add(Butterminer);
panel_sud_article.add(flow_sud);
Co.add(BorderLayout.SOUTH,panel_sud_article);
} |
l'erreur lorsque je clique sur le JButton valider
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| Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at Source.IhmArticle.actionPerformed(IhmArticle.java:396)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121) |
merci !
