示例


public static void main( String[] args ){
Lock lock = new Lock();
final Consumer consumer = new Consumer( lock );
final Producer producer = new Producer( lock );

(new Thread( new Runnable() {
public void run() {
consumer.consume();
}
})).start();


(new Thread( new Runnable() {
public void run() {
producer.produce();
}
})).start();
}

public static final class Lock {
public Lock() {
super();
lock();
}
public boolean isAvailable() {
return available;
}
public void lock() {
available = false;
}
public void unlock() {
available = true;
}
private boolean available = false;
}

public static final class Consumer {
public Consumer( Lock lock ) {
this .lock = lock;
}

public void consume() {
System.out.println( "Consumer: consume was called" ); //$NON-NLS-1$
synchronized ( lock ) {
while ( !lock.isAvailable() ) {
System.out.println( "Consumer: waiting..." ); //$NON-NLS-1$
try {
lock.wait();
} catch (InterruptedException e) {}
}
}
System.out.println( "Consumer: exiting" ); //$NON-NLS-1$
}
private Lock lock;
}

public static final class Producer {
public Producer( Lock lock ) {
this .lock = lock;
}
public void produce() {
System.out.println( "Producer: produce was called" ); //$NON-NLS-1$
synchronized ( lock ) {
Thread.currentThread().destroy();
}
System.out.println( "Producer: exiting" ); //$NON-NLS-1$
}
private Lock lock;
}


解决方案
不要调用 destroy(),依靠缺省的线程终止。

public static void main( String[] args ){
Lock lock = new Lock();
final Consumer consumer = new Consumer( lock );
final Producer producer = new Producer( lock );

(new Thread( new Runnable() {
public void run() {
consumer.consume();
}
})).start();


(new Thread( new Runnable() {
public void run() {
producer.produce();
}
})).start();
}

public static final class Lock {
public Lock() {
super();
lock();
}
public boolean isAvailable() {
return available;
}
public void lock() {
available = false;
}
public void unlock() {
available = true;
}
private boolean available = false;
}

public static final class Consumer {
public Consumer( Lock lock ) {
this .lock = lock;
}

public void consume() {
System.out.println( "Consumer: consume was called" ); //$NON-NLS-1$
synchronized ( lock ) {
while ( !lock.isAvailable() ) {
System.out.println( "Consumer: waiting..." ); //$NON-NLS-1$
try {
lock.wait();
} catch (InterruptedException e) {}
}
}
System.out.println( "Consumer: exiting" ); //$NON-NLS-1$
}
private Lock lock;
}

public static final class Producer {
public Producer( Lock lock ) {
this .lock = lock;
}
public void produce() {
System.out.println( "Producer: produce was called" ); //$NON-NLS-1$
System.out.println( "Producer: unlocking..." ); //$NON-NLS-1$
synchronized ( lock ) {
lock.unlock();
lock.notifyAll();
}
System.out.println( "Producer: exiting" ); //$NON-NLS-1$
}
private Lock lock;
}