子线程循环10次，接着主线程循环100次，接着又回到子线程循环10次，接着再回到主线程100次，如此循环50次

public class ThreadCommunication {
public static void main(String[] args) {
final Business business = new Business();
new Thread(new Runnable() {
public void run() {
for (int i = 1; i <= 50; i++) {
business.sub(i);
}
}

}).start();

for (int i = 1; i <= 50; i++) {
business.main(i);
}
}
}

class Business {
private boolean bShouldSub = true;

public synchronized void sub(int i) {
while (!bShouldSub) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
for (int j = 1; j <= 10; j++) {
System.out.println("sub sequence is :" + j + "   main loop is :"
+ i);
}
bShouldSub = false;
this.notify();
}

public synchronized void main(int i) {
while (bShouldSub) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
for (int j = 1; j <= 100; j++) {
System.out.println("main sequence is :" + j + "   main loop is :"
+ i);
}
bShouldSub = true;
this.notify();
}
}