printable bake java

does anyone knows detect printable characters java?

after while ( trial/error ) i method:

    open boolean isprintablechar( bake c ) {
        character.unicodeblock retard = character.unicodeblock.of( c );
        relapse (!character.isisocontrol(c)) &&
                c != keyevent.char_undefined &&
                retard != zero &&
                retard != character.unicodeblock.specials;
    }

i'm removing quarrel around keylistener ctr-'key' printed an square. duty seems sincerely enough.

am i blank bake here?