La variable dtm n'est pas accessible.

Version imprimable

Bonjour,

J'ai écrit un programme test pour ajouter une ligne à un JTable, lorsque je clique sur l'item du menu.

Mais le programme ne compile pas car j'ai l'erreur suivante :
dtm cannot be resolved
sur cette ligne :
dtm.addRow(ob);

Le programme :

Code:

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// SimpleTable.java
// A test of the JTable class using default table models and a convenience 
// constructor.
//
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
 
import java.awt.*;
import java.awt.event.*;
 
public class TestJTable03 extends JFrame {
 
	private Action addRowAction = new AddRowAction();
 
	public class AddRowAction extends AbstractAction {
		public AddRowAction() {
			putValue(NAME, "Add Row");
			putValue(SMALL_ICON, new ImageIcon("images/up.gif"));
			putValue(SHORT_DESCRIPTION, "Add Row");
			putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_U));
		}
 
		public void actionPerformed(ActionEvent ae) {
			System.out.println("Clik sur menu");
		}
	}
 
	public TestJTable03() {
		super("Simple JTable Test");
		setSize(300, 200);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
	    DefaultTableModel dtm = new DefaultTableModel(
	                              new String[][] { 
	                                {"1", "2", "3"}, 
	                                {"4", "5", "6"} },
	                              new String[] {"Names", "In", "Order"});
	    JTable jt = new JTable(dtm);
	    Object[] ob = {"7", "8", "9"};
	    dtm.addRow(ob);
 
		JScrollPane jsp = new JScrollPane(jt);
 
		getContentPane().add(jsp, BorderLayout.CENTER);
 
		JMenuBar mb = new JMenuBar();
		JMenu menu = new JMenu("File");
		menu.add(new JMenuItem(addRowAction));
		mb.add(menu);
		setJMenuBar(mb);
	}
 
	class SampleAction extends AbstractAction {
		// This is our sample action. It must have an actionPerformed()
		// method,
		// which is called when the action should be invoked.
		public SampleAction(String text, Icon icon) {
			super(text, icon);
		}
 
		public void actionPerformed(ActionEvent e) {
		    Object[] ob = {"10", "11", "12"};
		    dtm.addRow(ob);
 
			System.out.println("Action [" + e.getActionCommand()
					+ "] performed!");
		}
	}
 
	public static void main(String args[]) {
		TestJTable03  st = new TestJTable03();
		st.setVisible(true);
	}
}

SAlut,

C'est parce que dtm n appartient pas a la classe SampleAction
une des solution serait un truc comme ca :

Code:

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// SimpleTable.java
// A test of the JTable class using default table models and a convenience 
// constructor.
//
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
 
import java.awt.*;
import java.awt.event.*;
 
public class TestJTable03 extends JFrame {
 
	private Action addRowAction = new AddRowAction();
 
	public class AddRowAction extends AbstractAction {
		public AddRowAction() {
			putValue(NAME, "Add Row");
			putValue(SMALL_ICON, new ImageIcon("images/up.gif"));
			putValue(SHORT_DESCRIPTION, "Add Row");
			putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_U));
		}
 
		public void actionPerformed(ActionEvent ae) {
			System.out.println("Clik sur menu");
		}
	}
 
	public TestJTable03() {
		super("Simple JTable Test");
		setSize(300, 200);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
	    DefaultTableModel dtm = new DefaultTableModel(
	                              new String[][] { 
	                                {"1", "2", "3"}, 
	                                {"4", "5", "6"} },
	                              new String[] {"Names", "In", "Order"});
	    JTable jt = new JTable(dtm);
	    Object[] ob = {"7", "8", "9"};
	    dtm.addRow(ob);
 
		JScrollPane jsp = new JScrollPane(jt);
 
		getContentPane().add(jsp, BorderLayout.CENTER);
 
		JMenuBar mb = new JMenuBar();
		JMenu menu = new JMenu("File");
		menu.add(new JMenuItem(addRowAction));
		mb.add(menu);
		setJMenuBar(mb);
	}
 
	class SampleAction extends AbstractAction {
                private DefaultTableModel handleModel;
		// This is our sample action. It must have an actionPerformed()
		// method,
		// which is called when the action should be invoked.
		public SampleAction(String text, Icon icon, DefaultTableModel t ) {
			super(text, icon);
                        handleModel = t;
		}
 
		public void actionPerformed(ActionEvent e) {
		    Object[] ob = {"10", "11", "12"};
		    handleModel.addRow(ob);
 
			System.out.println("Action [" + e.getActionCommand()
					+ "] performed!");
		}
	}
 
	public static void main(String args[]) {
		TestJTable03  st = new TestJTable03();
		st.setVisible(true);
	}
}

Pour ceux qui seraient intéréssés par le sujet je copie un exemple sans erreur de compile et qui ajoute une ligne à la JTable.

Tintin92

Code:

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package srcTest;
 
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
 
class FenJTable extends JFrame implements ActionListener{
	public FenJTable() {
		setTitle("Test JTable");
		setSize(300, 200);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
 
		dtm = new DefaultTableModel(new String[][] { { "1", "2", "3" },
				{ "4", "5", "6" } }, new String[] { "Names", "In", "Order" });
		JTable jt = new JTable(dtm);
		Object[] ob = { "7", "8", "9" };
		dtm.addRow(ob);
 
		JScrollPane jsp = new JScrollPane(jt);
 
		getContentPane().add(jsp, BorderLayout.CENTER);
 
		/* creation barre des menus */
		barreMenus = new JMenuBar();
		setJMenuBar(barreMenus);
		/* creation menu Couleur et ses options Rouge et Vert */
		mFile = new JMenu("File");
		barreMenus.add(mFile);
 
		jmiAddRow = new JMenuItem ("Add Row") ;
		mFile.add(jmiAddRow ) ;
		jmiAddRow.addActionListener (this) ;
 
	}
 
	public void actionPerformed(ActionEvent ev) {
		System.out.println("action sur jmiAddRow");
		Object[] ob = { "10", "11", "12" };
		dtm.addRow(ob);
	}
 
	private DefaultTableModel dtm;
 
	private JMenuBar barreMenus;
	private JMenu mFile;
	private JMenuItem jmiAddRow;
 
}
 
public class TestJTable {
	public static void main(String args[]) {
		FenJTable fen = new FenJTable();
		fen.setVisible(true);
	}
}