Recuperar hora do sitema operacional

Tenta:

SimpleDateFormat f = new SimpleDateFormat("hh:mm:ss");
f.format(new Date(System.currentTimeMillis()));

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carisio

Utilize

import java.text.*;

SimpleDateFormat sdf = new SimpleDateFormat (“HH:mm:ss”);

System.out.println(sdf.format(new java.util.Date()));