ta.setComponentPopupMenu(popup);
popup.addPopupMenuListener(new PopupMenuListener() {
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
copy.setEnabled(ta.getSelectionStart() != ta.getSelectionEnd());
cut.setEnabled(ta.getSelectionStart() != ta.getSelectionEnd());
}
public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {}
public void popupMenuCanceled(PopupMenuEvent e) {}
});
は何をしているのでしょうか?急ぎなので簡単にお願いします、￥すみません