如何对所有文本组件使用 Ctrl+Z 和 Ctrl+Y？

In fact i know how to implement using CTRL+Z (Undo) and CTRL+Y (Redo) with one JTextField. But i have hundreds of Text Components in my Swing application, so is there a way to apply this for all Text Components in my application, so when i click CTRL+Z in any Text Component it would undo the last entry in that Field ?

我尝试过实施它事件队列 http://docs.oracle.com/javase/1.4.2/docs/api/java/awt/EventQueue.html，但是没有用！

要使所有文本组件“可撤消”，您可以简单地使用您自己的子类创建它们，例如：

public class MyTextField extends JTextField {
    public MyTextField() {
        final UndoManager undoMgr = new UndoManager();

        // Add listener for undoable events
        getDocument().addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent pEvt) {
                undoMgr.addEdit(pEvt.getEdit());
            }
        });

        // Add undo/redo actions
        getActionMap().put(UNDO_ACTION, new AbstractAction(UNDO_ACTION) {
            public void actionPerformed(ActionEvent pEvt) {
                try {
                    if (undoMgr.canUndo()) {
                        undoMgr.undo();
                    }
                } catch (CannotUndoException e) {
                    e.printStackTrace();
                }
            }
        });
        getActionMap().put(REDO_ACTION, new AbstractAction(REDO_ACTION) {
            public void actionPerformed(ActionEvent pEvt) {
                try {
                    if (undoMgr.canRedo()) {
                        undoMgr.redo();
                    }
                } catch (CannotRedoException e) {
                    e.printStackTrace();
                }
            }
        });

        // Create keyboard accelerators for undo/redo actions (Ctrl+Z/Ctrl+Y)
        getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK),
            UNDO_ACTION);
        getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK),
            REDO_ACTION);
    }
}

然后而不是创建JTextFields，创建MyTextFields。限制是您可能还想创建另一个子类JTextArea对于其他的依此类推JTextComponents。因此，还可以使用实用程序方法将撤消/重做功能添加到任何现有的JTextCompoent:

public final static String UNDO_ACTION = "Undo";

public final static String REDO_ACTION = "Redo";

public static void makeUndoable(JTextComponent pTextComponent) {
    final UndoManager undoMgr = new UndoManager();

    // Add listener for undoable events
    pTextComponent.getDocument().addUndoableEditListener(new UndoableEditListener() {
        public void undoableEditHappened(UndoableEditEvent evt) {
            undoMgr.addEdit(evt.getEdit());
        }
    });

    // Add undo/redo actions
    pTextComponent.getActionMap().put(UNDO_ACTION, new AbstractAction(UNDO_ACTION) {
        public void actionPerformed(ActionEvent evt) {
            try {
                if (undoMgr.canUndo()) {
                    undoMgr.undo();
                }
            } catch (CannotUndoException e) {
                e.printStackTrace();
            }
        }
    });
    pTextComponent.getActionMap().put(REDO_ACTION, new AbstractAction(REDO_ACTION) {
        public void actionPerformed(ActionEvent evt) {
            try {
                if (undoMgr.canRedo()) {
                    undoMgr.redo();
                }
            } catch (CannotRedoException e) {
                e.printStackTrace();
            }
        }
    });

    // Create keyboard accelerators for undo/redo actions (Ctrl+Z/Ctrl+Y)
    pTextComponent.getInputMap().put(
        KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK), UNDO_ACTION);
    pTextComponent.getInputMap().put(
        KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK), REDO_ACTION);
}

最终且绝对透明的解决方案是使用以下方法实现您自己的 UI 类低频特性 https://stackoverflow.com/questions/2592207/how-to-improve-look-and-feel-of-java-swing-gui，但是在使所有 TextComponents 可撤消之前，您可能需要三思而后行，因为内存消耗原因，例如，如果您经常对这些组件执行大量文本修改...