如何优雅的关闭一个线程

package test;

public class ThreadStop extends Thread {

//保证尽快开始处理
private volatile boolean shutdownRequested = false;

public final void run() {
while (!shutdownRequested) {
doWork();
}
try{
doShutDown();
}catch(InterruptedException e){
e.printStackTrace();
}
}

void doWork() {
System.out.println("doWork");
}

void doShutDown() throws InterruptedException {
shutdownRequested = true;
interrupt();

}

public static void main(String[] args) throws Exception {
ThreadStop ts = new ThreadStop();
ts.start();
ts.doShutDown();
ts.join();
}
}