How to get the private rawCode field out of a Java Swing KeyEvent

getKeyEventRawCode.ceylon

import java.awt.event {
    KeyEvent
}
import java.lang {
    Runnable,
    JBoolean=Boolean,
    JLong=Long
}
import java.lang.reflect {
    Field
}

Field getRawCodeField() {
    value c = javaClass<KeyEvent>();
    value f = c.getDeclaredField("rawCode");
    javaClass<Field>().getMethod("setAccessible", JBoolean.\iTYPE).invoke(f, JBoolean(true));
    return f;
}
Field rawCodeField = getRawCodeField();
shared Integer getRawCode(KeyEvent e) {
    assert(is JLong v = rawCodeField.get(e));
    return v.longValue();
}

// ...
    shared actual void keyPressed(KeyEvent? keyEvent) {
        if (!exists keyEvent) { return; }
        value rawCode = getRawCode(keyEvent);
        print(rawCode);
    }

And if you want to get events for the TAB key as well, remember to do

component.focusTraversalKeysEnabled = false;