Java多线程wait()、notify()小demo

public class MainActivity extends AppCompatActivity {

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    LinkedList buffer = new LinkedList();    int maxSize = 10;    Thread producer = new Producer(buffer, maxSize, "PRODUCER");    Thread consumer = new Consumer(buffer, maxSize, "CONSUMER");    producer.start(); consumer.start(); }

}

//下面是两个子线程

class Consumer extends Thread {
private LinkedList queue;
private int maxSize;
public Consumer(LinkedList queue, int maxSize, String name){
super(name);
this.queue = queue;
this.maxSize = maxSize;
}
@Override public void run() {
while (true) {
synchronized (queue) {
while (queue.isEmpty()) {
Log.e(“TAG”,”Queue is empty,” + “Consumer thread is waiting” + ” for producer thread to put something in queue”);
try {
queue.wait();
} catch (Exception ex) {
ex.printStackTrace();
}
}
Log.e(“TAG”,”Consuming value : ” + queue.remove()); queue.notifyAll();
}
}
}
}

class Producer extends Thread {
private LinkedList queue;
private int maxSize;

public Producer(LinkedList queue, int maxSize, String name) {    super(name);    this.queue = queue;    this.maxSize = maxSize;}@Overridepublic void run() {    while (true) {        synchronized (queue) {            while (queue.size() == maxSize) {                try {                    Log.e("TAG","Queue is full, " + "Producer thread waiting for " + "consumer to take something from queue");                    queue.wait();                } catch (Exception ex) {                    ex.printStackTrace();                }            }            Random random = new Random();            int i = random.nextInt();            Log.e("TAG","Producing value : " + i);            queue.add(i);            queue.notifyAll();        }    }}

}