TextFieldCaret.java 文件源码

@Override
public void keyTyped(KeyEvent e) {
    int ign = InputEvent.ALT_DOWN_MASK | InputEvent.CTRL_DOWN_MASK | InputEvent.META_DOWN_MASK;
    if ((e.getModifiersEx() & ign) != 0)
        return;

    char c = e.getKeyChar();
    if (c == '\n') {
        stopEditing();
    } else if (c != KeyEvent.CHAR_UNDEFINED && !Character.isISOControl(c)) {
        if (pos < curText.length()) {
            curText = curText.substring(0, pos) + c + curText.substring(pos);
        } else {
            curText += c;
        }
        ++pos;
        field.setText(curText);
    }
}