Con Dos faccio javac TextEditor.java e mi crea il file class.
ma quando vado a fare java TextEditor mi da il seguente errore:
Exception in thread "main" java.lang.NoClassDefFoundError: TextEditor
Questo è il codice TextEditor.java utilizzato:
codice:import javax.swing.*; import javax.swing.text.*; import java.awt.*; import java.awt.event.*; import java.io.*; public class TextEditor extends JFrame { private JTextComponent editor; private JFileChooser fileChooser; protected Action loadAction; protected Action saveAction; protected Action cutAction; protected Action copyAction; protected Action pasteAction; public TextEditor() { super("TextEditor"); setSize(300,300); createActions(); JMenuBar menuBar = createMenuBar(); JToolBar toolbar = createToolBar(); editor = createEditor(); JComponent centerPanel = createCenterComponent(); getContentPane().add(BorderLayout.NORTH,toolbar); getContentPane().add(BorderLayout.CENTER,centerPanel); setJMenuBar(menuBar); fileChooser = new JFileChooser(); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } protected void createActions() { loadAction = new AbstractAction("Open", new ImageIcon("Open24.gif")) { public void actionPerformed(ActionEvent e) { loadText(); } }; saveAction = new AbstractAction("Save", new ImageIcon("Save24.gif")) { public void actionPerformed(ActionEvent e) { saveText(); } }; cutAction = new AbstractAction("Cut", new ImageIcon("Cut24.gif")) { public void actionPerformed(ActionEvent e) { editor.cut(); } }; copyAction = new AbstractAction("Copy", new ImageIcon("Copy24.gif")) { public void actionPerformed(ActionEvent e) { editor.copy(); } }; pasteAction = new AbstractAction("Paste", new ImageIcon("Paste24.gif")) { public void actionPerformed(ActionEvent e) { editor.paste(); } }; } protected JToolBar createToolBar() { JToolBar tb = new JToolBar(); tb.add(loadAction); tb.add(saveAction); tb.addSeparator(); tb.add(cutAction); tb.add(copyAction); tb.add(pasteAction); return tb; } protected JMenuBar createMenuBar() { JMenu menu = new JMenu("Menu"); menu.add(loadAction); menu.add(saveAction); menu.addSeparator(); menu.add(cutAction); menu.add(copyAction); menu.add(pasteAction); JMenuBar menuBar = new JMenuBar(); menuBar.add(menu); return menuBar; } protected JComponent createCenterComponent() { if(editor == null) editor = createEditor(); return new JScrollPane(editor); } protected JTextComponent createEditor() { return new JTextArea(); } public void loadText() { int response = fileChooser.showOpenDialog(this); if(response==JFileChooser.APPROVE_OPTION) { try { File f = fileChooser.getSelectedFile(); Reader in = new FileReader(f); editor.read(in,null); setTitle(f.getName()); } catch(Exception e) {} } } public void saveText() { int response = fileChooser.showSaveDialog(this); if(response==JFileChooser.APPROVE_OPTION) { try { File f = fileChooser.getSelectedFile(); Writer out = new FileWriter(f); editor.write(out); setTitle(f.getName()); } catch(Exception e) {} } } public static void main(String argv[]) { TextEditor t = new TextEditor(); } }
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