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AWT/Swing Java Discussion :

probleme de compilation


Sujet :

AWT/Swing Java

  1. #1
    Membre habitué Avatar de zangaloni
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    Par défaut probleme de compilation
    LE CODE SE COMPILE PAS;l'erreur est
    Exception in thread "main" java.lang.Error: Unresolved compilation problems:
    The method setLocationRelativeTo(null) is undefined for the type Fenetre
    The method setVisible(boolean) is undefined for the type Fenetre

    at lika.Main.main(Main.java:14)

    Code : Sélectionner tout - Visualiser dans une fenêtre à part
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    public class Fenetre {
     
        private static final long serialVersionUID = 1L;
    	   JPanel pan1=new JPanel();
     
        private JList jList1;
        private JMenuBar jMenuBar1;
        private JMenuItem jMenuItem6;
        private JMenuItem jMenuItem5;
        private JMenuItem jMenuItem4;
        private JMenu jMenu5;
        private JButton jButton4;
        private JButton jButton3;
        private JButton jButton2;
        private JButton jButton1;
        private JLabel jLabel1;
        private JMenuItem jMenuItem9;
        private JMenuItem jMenuItem10;
        private JMenuItem jMenuItem8;
        private JMenuItem jMenuItem7;
        private JMenuItem jMenuItem3;
        private JMenuItem jMenuItem2;
        private JMenuItem jMenuItem1;
        private JMenu jMenu4;
        private JMenu jMenu3;
        private JMenu jMenu2;
        private JMenu jMenu1;
        private JTextPane jTextPane1;
    	private JButton jButtonsdl;
    	private JLabel jLabel2;
    	private JLabel jLabelsdl;
    	 JPanel pan2=new JPanel();
         final JFrame frm = new JFrame();
     
        public Fenetre() {
            super();
            initZ();
     
            frm.setSize(790, 564);
            frm.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
           frm.getContentPane().add(pan2, "panel2");    //idem
            frm.getContentPane().add(pan1, "panel1");    //c'est ce texte qui sera utilisé lors de l'appel à la méthode show
     
            frm.setVisible(true);
        }
     
        public void initZ() {
     
     
            frm.getContentPane().setForeground(new java.awt.Color(255, 255, 255));
            frm.getContentPane().setBackground(new java.awt.Color(192, 192, 192));
            BorderLayout thisLayout = new BorderLayout();
            frm.getContentPane().setLayout(thisLayout);
            frm.setTitle("SDL\n");
     
            jButton1 = new JButton();
            jButton1.setText("Quitter");
            jButton1.setBackground(new java.awt.Color(0, 0, 0));
            jButton1.setFont(new java.awt.Font("Bookman Old Style", 3, 18));
            jButton1.setForeground(new java.awt.Color(255, 0, 0));
            jButton1.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                    frm.setVisible(false);
                }
            });
     
            jLabel1 = new JLabel();
            frm.getContentPane().add(jButton1, BorderLayout.SOUTH);
            jButton1.setBounds(0, 257, 514, 37);
            jButton1.setPreferredSize(new java.awt.Dimension(376, 54));
            jButton1.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton2 = new JButton();
            frm.getContentPane().add(jButton2, BorderLayout.WEST);
            jButton2.setText("S.Arb.");
            jButton2.setPreferredSize(new java.awt.Dimension(116, 145));
            jButton2.setBackground(new java.awt.Color(0, 0, 0));
            jButton2.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton2.setForeground(new java.awt.Color(255, 0, 0));
            jButton2.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton4 = new JButton();
            frm.getContentPane().add(jButton4, BorderLayout.EAST);
            jButton4.setText("Graphes");
            jButton4.setPreferredSize(new java.awt.Dimension(125, 113));
            jButton4.setBackground(new java.awt.Color(0, 0, 0));
            jButton4.setForeground(new java.awt.Color(255, 0, 0));
            jButton4.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton4.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton3 = new JButton();
            frm.getContentPane().add(jButton3, BorderLayout.CENTER);
            frm.getContentPane().add(jLabel1, BorderLayout.NORTH);
            jButton3.setText("S.Lin.");
            jButton3.setPreferredSize(new java.awt.Dimension(376, 125));
            jButton3.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton3.setForeground(new java.awt.Color(255, 0, 0));
            jButton3.setBackground(new java.awt.Color(0, 0, 0));
            jButton3.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
            jButton3.addActionListener(new ActionListener(){
                public void actionPerformed(ActionEvent evt) {
     
                	CardLayout cl = (CardLayout)(frm.getContentPane().getLayout());
                    //cl.previous(frm.getContentPane());
                    cl.show(frm.getContentPane(), "panel2");
     
     
     
               }
            }
        );
     
            ListModel jList1Model =
                new DefaultComboBoxModel(
                new String[]{" ", " ", "1.Introduction", "2.Tableaux", "3.Listes chaînées", "4.Piles", "5.Files", "6.Conclusion"});
        jList1 = new JList();
        pan2.add(jList1, BorderLayout.WEST);
        jList1.setModel(jList1Model);
        jList1.setBounds(21, 74, 146, 133);
        jList1.setBorder(BorderFactory.createEtchedBorder(BevelBorder.LOWERED));
        jList1.setFont(new java.awt.Font("Bookman Old Style", 3, 18));
        jList1.setForeground(new java.awt.Color(0, 0, 0));
        jList1.setBackground(new java.awt.Color(255, 128, 64));
        jList1.setPreferredSize(new java.awt.Dimension(216, 291));
     
     
     
     
     
            jLabel1.setText(" Bienvenue ...");
            jLabel1.setFont(new java.awt.Font("Detente", 1, 48));
            jLabel1.setBackground(new java.awt.Color(128, 128, 128));
            jLabel1.setForeground(new java.awt.Color(0, 0, 0));
            jLabel1.setBounds(0, 0, 430, 70);
            jLabel1.setPreferredSize(new java.awt.Dimension(430, 70));
          // jLabel1.setIcon(new ImageIcon(getClass().getClassLoader().getResource("mm/logo.gif")));
            jLabel1.setIconTextGap(6);
            jLabel1.setLocation(new java.awt.Point(1, 0));
            jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
            jLabel1.setHorizontalTextPosition(SwingConstants.RIGHT);
            jLabel1.setDebugGraphicsOptions(DebugGraphics.BUFFERED_OPTION);
            jLabel1.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
     
            jMenuBar1 = new JMenuBar();
            frm.setJMenuBar(jMenuBar1);
            jMenuBar1.setBackground(new java.awt.Color(0, 0, 0));
     
            jMenu1 = new JMenu();
            jMenuBar1.add(jMenu1);
            jMenu1.setText("Algorithmes");
            jMenu1.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu1.setForeground(new java.awt.Color(255, 0, 0));
     
            jMenu2 = new JMenu();
            jMenu1.add(jMenu2);
            jMenu2.setText("Structures Linéaires");
            jMenu2.setBackground(new java.awt.Color(0, 0, 0));
            jMenu2.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu2.setForeground(new java.awt.Color(255, 0, 0));
     
            jMenuItem7 = new JMenuItem();
            jMenu2.add(jMenuItem7);
            jMenuItem7.setText("Tableaux");
            jMenuItem7.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem7.setBackground(new java.awt.Color(255, 0, 0));
     
            jMenuItem8 = new JMenuItem();
            jMenu2.add(jMenuItem8);
            jMenuItem8.setText("Listes");
            jMenuItem8.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem8.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
     
            jMenuItem9 = new JMenuItem();
            jMenu2.add(jMenuItem9);
            jMenuItem9.setText("Piles");
            jMenuItem9.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem9.setBackground(new java.awt.Color(255, 0, 0));
     
            jMenuItem10 = new JMenuItem();
            jMenu2.add(jMenuItem10);
            jMenuItem10.setText("Files");
            jMenuItem10.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem10.setBackground(new java.awt.Color(255, 0, 0));
     
     
            jMenuItem1 = new JMenuItem();
            jMenu1.add(jMenuItem1);
            jMenuItem1.setText("Structures Arborescentes");
            jMenuItem1.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem1.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem1.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem2 = new JMenuItem();
            jMenu1.add(jMenuItem2);
            jMenuItem2.setText("Graphes");
            jMenuItem2.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem2.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem2.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenu3 = new JMenu();
            jMenuBar1.add(jMenu3);
            jMenu3.setText("Cours");
            jMenu3.setForeground(new java.awt.Color(255, 0, 0));
            jMenu3.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu3.setBackground(new java.awt.Color(0, 0, 0));
            jMenu3.setOpaque(false);
            jMenu3.setToolTipText("Besoin d'aide ?");
     
            jMenu4 = new JMenu();
            jMenuBar1.add(jMenu4);
            jMenu4.setText("?");
            jMenu4.setForeground(new java.awt.Color(255, 0, 0));
            jMenu4.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem3 = new JMenuItem();
            jMenu4.add(jMenuItem3);
            jMenuItem3.setText("Aide");
            jMenuItem3.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem3.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem3.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenu5 = new JMenu();
            jMenu4.add(jMenu5);
            jMenu5.setText("A propos");
            jMenu5.setBackground(new java.awt.Color(0, 0, 0));
            jMenu5.setForeground(new java.awt.Color(255, 0, 0));
            jMenu5.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem4 = new JMenuItem();
            jMenu5.add(jMenuItem4);
            jMenuItem4.setText("SDL");
            jMenuItem4.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem4.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem4.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                	   CardLayout cl = (CardLayout)(frm.getContentPane().getLayout());
    	                //cl.previous(getContentPane());
    	                cl.show(frm.getContentPane(), "panel1");
                }
                }
            );
     
     
     
            try{ 
            	frm.setTitle("SDL");
            	pan1.setLayout(null);
        	   pan1.setBackground(new java.awt.Color(0,0,0));
     
        				jTextPane1 = new JTextPane();
        				frm.getContentPane().add(jTextPane1);
        				jTextPane1.setText("   SDL est une Interface pédagogique qui facilite la compréhension et l\u2019utilisation des Structures de Données notamment les Structures Linéaires. Cette interface peut être utilisée soit par un étudiant, qui pourra tester les différents types de structures et consulter les algorithmes relatifs à chaque structure, soit par un enseignant pour expliquer les structures de données d\u2019une manière visuelle.");
        				jTextPane1.setBounds(44, 98, 692, 222);
        				jTextPane1.setFont(new java.awt.Font("Bookman Old Style",2,22));
        				jTextPane1.setBackground(new java.awt.Color(255,255,255));
        				jTextPane1.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        				jTextPane1.setEditable(false);
     
        				jButtonsdl = new JButton();
        				pan1.add(jButton2);
        		        jButtonsdl.setText("Quitter");
        				jButtonsdl.setBounds(287, 372, 187, 44);
        				jButtonsdl.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
        				jButtonsdl.setFont(new java.awt.Font("Bookman Old Style",3,18));
        				jButtonsdl.setBackground(new java.awt.Color(255,0,0));
        				jButtonsdl.addActionListener(new ActionListener() {
        					public void actionPerformed(ActionEvent evt) {
        		        		frm.setVisible(false);
        					}
        				   });
     
        				{
        					jLabelsdl = new JLabel();
        					pan1.add(jLabelsdl);
        					jLabelsdl.setIcon(new ImageIcon(getClass().getClassLoader().getResource("mm/logo.gif")));
        					jLabelsdl.setBounds(44, 18, 56, 50);
        				}
        				{
        					jLabel2 = new JLabel();
        					pan1.add(jLabel2);
        					jLabel2.setText("Structures de Données Linéaires");
        					jLabel2.setBounds(106, 18, 624, 50);
        					jLabel2.setForeground(new java.awt.Color(255,0,0));
        					jLabel2.setFont(new java.awt.Font("Goudy Stout",2,18));
        				}
     
        			frm.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        			frm.pack();
        			frm.setSize(784, 519);
               } catch (Exception e) {
       			e.printStackTrace();
       		}
     
     
     
     
            jMenuItem5 = new JMenuItem();
            jMenu5.add(jMenuItem5);
            jMenuItem5.setText("Auteurs");
            jMenuItem5.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem5.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem5.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                    jMenuItem5ActionPerformed(evt);
                }
            });
     
            jMenuItem6 = new JMenuItem();
            jMenu5.add(jMenuItem6);
            jMenuItem6.setText("References");
            jMenuItem6.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem6.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
        }
     
     
     
        private void jMenuItem5ActionPerformed(ActionEvent evt) {
            JFrame u = new JFrame();
            u.setVisible(true);
        }
     
        }

  2. #2
    Membre chevronné Avatar de guigui5931
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    Par défaut
    Apprement tu essaye d'utiliser une méthode nommée setLocationRelativeTo et une méthode setVisible qui n'existe pas dans ta classe fenêtre.
    Tu fais ça dans ta classe Main (que tu ne nous as pas montré).

    Je pense que tu veux que Fenetre soit une JFrame, dans ce cas il faut qu'elle extends JFrame.
    autant l'hiver éclate que l'hétéroclite
    le vrai geek c'est celui qui croit qu'il y a 1024 mètres dans un kilomètre

  3. #3
    Membre habitué Avatar de zangaloni
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    Par défaut
    [QUOTE=

    Je pense que tu veux que Fenetre soit une JFrame, dans ce cas il faut qu'elle extends JFrame.[/QUOTE]
    Voila j'ai changé ma classe en extends JFrame.....mais la y' une autre erreur qui flote

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    package lika;
     
    import java.awt.BorderLayout;
    import java.awt.CardLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
     
    import javax.swing.BorderFactory;
    import javax.swing.DebugGraphics;
    import javax.swing.DefaultComboBoxModel;
    import javax.swing.ImageIcon;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JList;
    import javax.swing.JMenu;
    import javax.swing.JMenuBar;
    import javax.swing.JMenuItem;
    import javax.swing.JPanel;
    import javax.swing.JTextPane;
    import javax.swing.ListModel;
    import javax.swing.SwingConstants;
    import javax.swing.WindowConstants;
    import javax.swing.border.BevelBorder;
    import javax.swing.border.SoftBevelBorder;
     
    /**
     *
     * @author zangaloni
     */
    public class Fenetre extends JFrame{
     
        private static final long serialVersionUID = 1L;
    	   JPanel pan1=new JPanel();
     
        private JList jList1;
        private JMenuBar jMenuBar1;
        private JMenuItem jMenuItem6;
        private JMenuItem jMenuItem5;
        private JMenuItem jMenuItem4;
        private JMenu jMenu5;
        private JButton jButton4;
        private JButton jButton3;
        private JButton jButton2;
        private JButton jButton1;
        private JLabel jLabel1;
        private JMenuItem jMenuItem9;
        private JMenuItem jMenuItem10;
        private JMenuItem jMenuItem8;
        private JMenuItem jMenuItem7;
        private JMenuItem jMenuItem3;
        private JMenuItem jMenuItem2;
        private JMenuItem jMenuItem1;
        private JMenu jMenu4;
        private JMenu jMenu3;
        private JMenu jMenu2;
        private JMenu jMenu1;
        private JTextPane jTextPane1;
    	private JButton jButtonsdl;
    	private JLabel jLabel2;
    	private JLabel jLabelsdl;
    	 JPanel pan2=new JPanel();
     
        public Fenetre() {
            super();
            initZ();
     
           this.setSize(790, 564);
            this.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
           this.getContentPane().add(pan2, "panel2");    //idem
            this.getContentPane().add(pan1, "panel1");    //c'est ce texte qui sera utilisé lors de l'appel à la méthode show
     
            this.setVisible(true);
        }
     
        public void initZ() {
     
     
            this.getContentPane().setForeground(new java.awt.Color(255, 255, 255));
            this.getContentPane().setBackground(new java.awt.Color(192, 192, 192));
            BorderLayout thisLayout = new BorderLayout();
            this.getContentPane().setLayout(thisLayout);
            this.setTitle("SDL\n");
     
            jButton1 = new JButton();
            jButton1.setText("Quitter");
            jButton1.setBackground(new java.awt.Color(0, 0, 0));
            jButton1.setFont(new java.awt.Font("Bookman Old Style", 3, 18));
            jButton1.setForeground(new java.awt.Color(255, 0, 0));
            jButton1.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                setVisible(false);
                }
            });
     
            jLabel1 = new JLabel();
            getContentPane().add(jButton1, BorderLayout.SOUTH);
            jButton1.setBounds(0, 257, 514, 37);
            jButton1.setPreferredSize(new java.awt.Dimension(376, 54));
            jButton1.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton2 = new JButton();
            getContentPane().add(jButton2, BorderLayout.WEST);
            jButton2.setText("S.Arb.");
            jButton2.setPreferredSize(new java.awt.Dimension(116, 145));
            jButton2.setBackground(new java.awt.Color(0, 0, 0));
            jButton2.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton2.setForeground(new java.awt.Color(255, 0, 0));
            jButton2.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton4 = new JButton();
            getContentPane().add(jButton4, BorderLayout.EAST);
            jButton4.setText("Graphes");
            jButton4.setPreferredSize(new java.awt.Dimension(125, 113));
            jButton4.setBackground(new java.awt.Color(0, 0, 0));
            jButton4.setForeground(new java.awt.Color(255, 0, 0));
            jButton4.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton4.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
     
            jButton3 = new JButton();
            getContentPane().add(jButton3, BorderLayout.CENTER);
            getContentPane().add(jLabel1, BorderLayout.NORTH);
            jButton3.setText("S.Lin.");
            jButton3.setPreferredSize(new java.awt.Dimension(376, 125));
            jButton3.setFont(new java.awt.Font("Amethyst", 1, 28));
            jButton3.setForeground(new java.awt.Color(255, 0, 0));
            jButton3.setBackground(new java.awt.Color(0, 0, 0));
            jButton3.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, new java.awt.Color(0, 0, 0)));
            jButton3.addActionListener(new ActionListener(){
                public void actionPerformed(ActionEvent evt) {
     
                	CardLayout cl = (CardLayout)(getContentPane().getLayout());
                    //cl.previous(frm.getContentPane());
                    cl.show(getContentPane(), "panel2");
     
     
     
               }
            }
        );
     
            ListModel jList1Model =
                new DefaultComboBoxModel(
                new String[]{" ", " ", "1.Introduction", "2.Tableaux", "3.Listes chaînées", "4.Piles", "5.Files", "6.Conclusion"});
        jList1 = new JList();
        pan2.add(jList1, BorderLayout.WEST);
        jList1.setModel(jList1Model);
        jList1.setBounds(21, 74, 146, 133);
        jList1.setBorder(BorderFactory.createEtchedBorder(BevelBorder.LOWERED));
        jList1.setFont(new java.awt.Font("Bookman Old Style", 3, 18));
        jList1.setForeground(new java.awt.Color(0, 0, 0));
        jList1.setBackground(new java.awt.Color(255, 128, 64));
        jList1.setPreferredSize(new java.awt.Dimension(216, 291));
     
     
     
     
     
            jLabel1.setText(" Bienvenue ...");
            jLabel1.setFont(new java.awt.Font("Detente", 1, 48));
            jLabel1.setBackground(new java.awt.Color(128, 128, 128));
            jLabel1.setForeground(new java.awt.Color(0, 0, 0));
            jLabel1.setBounds(0, 0, 430, 70);
            jLabel1.setPreferredSize(new java.awt.Dimension(430, 70));
          // jLabel1.setIcon(new ImageIcon(getClass().getClassLoader().getResource("mm/logo.gif")));
            jLabel1.setIconTextGap(6);
            jLabel1.setLocation(new java.awt.Point(1, 0));
            jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
            jLabel1.setHorizontalTextPosition(SwingConstants.RIGHT);
            jLabel1.setDebugGraphicsOptions(DebugGraphics.BUFFERED_OPTION);
            jLabel1.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
     
            jMenuBar1 = new JMenuBar();
     setJMenuBar(jMenuBar1);
            jMenuBar1.setBackground(new java.awt.Color(0, 0, 0));
     
            jMenu1 = new JMenu();
            jMenuBar1.add(jMenu1);
            jMenu1.setText("Algorithmes");
            jMenu1.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu1.setForeground(new java.awt.Color(255, 0, 0));
     
            jMenu2 = new JMenu();
            jMenu1.add(jMenu2);
            jMenu2.setText("Structures Linéaires");
            jMenu2.setBackground(new java.awt.Color(0, 0, 0));
            jMenu2.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu2.setForeground(new java.awt.Color(255, 0, 0));
     
            jMenuItem7 = new JMenuItem();
            jMenu2.add(jMenuItem7);
            jMenuItem7.setText("Tableaux");
            jMenuItem7.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem7.setBackground(new java.awt.Color(255, 0, 0));
     
            jMenuItem8 = new JMenuItem();
            jMenu2.add(jMenuItem8);
            jMenuItem8.setText("Listes");
            jMenuItem8.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem8.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
     
            jMenuItem9 = new JMenuItem();
            jMenu2.add(jMenuItem9);
            jMenuItem9.setText("Piles");
            jMenuItem9.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem9.setBackground(new java.awt.Color(255, 0, 0));
     
            jMenuItem10 = new JMenuItem();
            jMenu2.add(jMenuItem10);
            jMenuItem10.setText("Files");
            jMenuItem10.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem10.setBackground(new java.awt.Color(255, 0, 0));
     
     
            jMenuItem1 = new JMenuItem();
            jMenu1.add(jMenuItem1);
            jMenuItem1.setText("Structures Arborescentes");
            jMenuItem1.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem1.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem1.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem2 = new JMenuItem();
            jMenu1.add(jMenuItem2);
            jMenuItem2.setText("Graphes");
            jMenuItem2.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem2.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem2.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenu3 = new JMenu();
            jMenuBar1.add(jMenu3);
            jMenu3.setText("Cours");
            jMenu3.setForeground(new java.awt.Color(255, 0, 0));
            jMenu3.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
            jMenu3.setBackground(new java.awt.Color(0, 0, 0));
            jMenu3.setOpaque(false);
            jMenu3.setToolTipText("Besoin d'aide ?");
     
            jMenu4 = new JMenu();
            jMenuBar1.add(jMenu4);
            jMenu4.setText("?");
            jMenu4.setForeground(new java.awt.Color(255, 0, 0));
            jMenu4.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem3 = new JMenuItem();
            jMenu4.add(jMenuItem3);
            jMenuItem3.setText("Aide");
            jMenuItem3.setBackground(new java.awt.Color(0, 0, 0));
            jMenuItem3.setForeground(new java.awt.Color(255, 0, 0));
            jMenuItem3.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenu5 = new JMenu();
            jMenu4.add(jMenu5);
            jMenu5.setText("A propos");
            jMenu5.setBackground(new java.awt.Color(0, 0, 0));
            jMenu5.setForeground(new java.awt.Color(255, 0, 0));
            jMenu5.setFont(new java.awt.Font("Bookman Old Style", 3, 14));
     
            jMenuItem4 = new JMenuItem();
            jMenu5.add(jMenuItem4);
            jMenuItem4.setText("SDL");
            jMenuItem4.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem4.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem4.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                	   CardLayout cl = (CardLayout)(getContentPane().getLayout());
    	                //cl.previous(getContentPane());
    	                cl.show(getContentPane(), "panel1");
                }
                }
            );
     
     
     
            try{ 
            	setTitle("SDL");
            	pan1.setLayout(null);
        	   pan1.setBackground(new java.awt.Color(0,0,0));
     
        				jTextPane1 = new JTextPane();
        				getContentPane().add(jTextPane1);
        				jTextPane1.setText("   SDL est une Interface pédagogique qui facilite la compréhension et l\u2019utilisation des Structures de Données notamment les Structures Linéaires. Cette interface peut être utilisée soit par un étudiant, qui pourra tester les différents types de structures et consulter les algorithmes relatifs à chaque structure, soit par un enseignant pour expliquer les structures de données d\u2019une manière visuelle.");
        				jTextPane1.setBounds(44, 98, 692, 222);
        				jTextPane1.setFont(new java.awt.Font("Bookman Old Style",2,22));
        				jTextPane1.setBackground(new java.awt.Color(255,255,255));
        				jTextPane1.setBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
        				jTextPane1.setEditable(false);
     
        				jButtonsdl = new JButton();
        				pan1.add(jButton2);
        		        jButtonsdl.setText("Quitter");
        				jButtonsdl.setBounds(287, 372, 187, 44);
        				jButtonsdl.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
        				jButtonsdl.setFont(new java.awt.Font("Bookman Old Style",3,18));
        				jButtonsdl.setBackground(new java.awt.Color(255,0,0));
        				jButtonsdl.addActionListener(new ActionListener() {
        					public void actionPerformed(ActionEvent evt) {
        		        		setVisible(false);
        					}
        				   });
     
        				{
        					jLabelsdl = new JLabel();
        					pan1.add(jLabelsdl);
        					jLabelsdl.setIcon(new ImageIcon(getClass().getClassLoader().getResource("mm/logo.gif")));
        					jLabelsdl.setBounds(44, 18, 56, 50);
        				}
        				{
        					jLabel2 = new JLabel();
        					pan1.add(jLabel2);
        					jLabel2.setText("Structures de Données Linéaires");
        					jLabel2.setBounds(106, 18, 624, 50);
        					jLabel2.setForeground(new java.awt.Color(255,0,0));
        					jLabel2.setFont(new java.awt.Font("Goudy Stout",2,18));
        				}
     
        			this.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        			this.pack();
        			this.setSize(784, 519);
               } catch (Exception e) {
       			e.printStackTrace();
       		}
     
     
     
     
            jMenuItem5 = new JMenuItem();
            jMenu5.add(jMenuItem5);
            jMenuItem5.setText("Auteurs");
            jMenuItem5.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem5.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
            jMenuItem5.addActionListener(new ActionListener() {
     
                public void actionPerformed(ActionEvent evt) {
                    jMenuItem5ActionPerformed(evt);
                }
            });
     
            jMenuItem6 = new JMenuItem();
            jMenu5.add(jMenuItem6);
            jMenuItem6.setText("References");
            jMenuItem6.setBackground(new java.awt.Color(255, 0, 0));
            jMenuItem6.setFont(new java.awt.Font("Bookman Old Style", 2, 14));
        }
     
     
     
        private void jMenuItem5ActionPerformed(ActionEvent evt) {
            JFrame u = new JFrame();
            u.setVisible(true);
        }
     
        }
    • c 'est le code d'erreur

    java.lang.NullPointerException
    at javax.swing.ImageIcon.<init>(Unknown Source)
    at lika.Fenetre.initZ(Fenetre.java:306)
    at lika.Fenetre.<init>(Fenetre.java:66)
    at lika.Main$1.run(Main.java:13)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
    Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: cannot add to layout: unknown constraint: panel2
    at java.awt.BorderLayout.addLayoutComponent(Unknown Source)
    at java.awt.BorderLayout.addLayoutComponent(Unknown Source)
    at java.awt.Container.addImpl(Unknown Source)
    at java.awt.Container.add(Unknown Source)
    at lika.Fenetre.<init>(Fenetre.java:70)
    at lika.Main$1.run(Main.java:13)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

    voila ma methode Main
    Code : Sélectionner tout - Visualiser dans une fenêtre à part
    1
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    12
     
    public class Main {
    	public static void main(String[] args) {
    		SwingUtilities.invokeLater(new Runnable() {
    			public void run() {
    				 new Fenetre();
     
    			}
    		});
    	}
     
    }
    MERCI

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