log.error("InterruptTest.SleeperThread.runWait(): " + ex);
System.err.println("InterruptTest.SleeperThread.runWait(): " + ex);
        void runWait() {            Object mutex=new Object();            synchronized(mutex) {                try {                    mutex.wait();                }                catch(InterruptedException ex) {                    log.error("InterruptTest.SleeperThread.runWait(): " + ex);                }            }        }