Question

如何实现java编辑器的撤销功能

Answer 1

UndoManager undo = new UndoManager();
protected UndoableEditListener undoHandler = new UndoHandler();
// 撤消
else if (e.getSource() == mEdit_Undo || e.getSource() == popupMenu_Undo || e.getSource() == undoButton) {
Text.requestFocus();
if (undo.canUndo()) {
try {
undo.undo();

} catch (CannotUndoException ex) {
System.out.println("Unable to undo: " + ex);
ex.printStackTrace();
}

if (!undo.canUndo()) {
mEdit_Undo.setEnabled(false);
popupMenu_Undo.setEnabled(false);
undoButton.setEnabled(false);

}
}
}

Answer 2

你是普通的撤销还是怎么撤销？
还有你是什么编辑器...

Answer 3

ctr+z