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public class WaitNotifyTest {
private static final long SLEEP_INTERVAL = 3000;
private boolean running = true;
private Thread thread;
public void start() {
print("Inside start() method");
thread = new Thread(new Runnable() {
@Override
public void run() {
print("Inside run() method");
try {
Thread.sleep(SLEEP_INTERVAL);
} catch(InterruptedException e) {
Thread.currentThread().interrupt();
}
synchronized(WaitNotifyTest.this) {
running = false;
WaitNotifyTest.this.notify();
}
}
});
thread.start();
}
public void join() throws InterruptedException {
print("Inside join() method");
synchronized(this) {
while(running) {
print("Waiting for the peer thread to finish.");
wait(); //waiting, not running
}
print("Peer thread finished.");
}
}
private void print(String s) {
System.out.println(s);
}
public static void main(String[] args) throws InterruptedException {
WaitNotifyTest test = new WaitNotifyTest();
test.start();
test.join();
}
}
The wait() method causes the current thread to wait until another thread invokes the notify() or notifyAll() methods for that object. The notify() method wakes up a single thread that is waiting on that object's monitor. The notifyAll() method wakes up all threads that are waiting on that object's monitor.Jul 2, 2563 BE
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public class WaitNotifyTest {
private static final long SLEEP_INTERVAL = 3000;
private boolean running = true;
private Thread thread;
public void start() {
print("Inside start() method");
thread = new Thread(new Runnable() {
@Override
public void run() {
print("Inside run() method");
try {
Thread.sleep(SLEEP_INTERVAL);
} catch(InterruptedException e) {
Thread.currentThread().interrupt();
}
synchronized(WaitNotifyTest.this) {
running = false;
WaitNotifyTest.this.notify();
}
}
});
thread.start();
}
public void join() throws InterruptedException {
print("Inside join() method");
synchronized(this) {
while(running) {
print("Waiting for the peer thread to finish.");
wait(); //waiting, not running
}
print("Peer thread finished.");
}
}
private void print(String s) {
System.out.println(s);
}
public static void main(String[] args) throws InterruptedException {
WaitNotifyTest test = new WaitNotifyTest();
test.start();
test.join();
}
}