// threads/SyncObject.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Synchronizing on another object

class DualSynch {

private Object syncObject = new Object();

public synchronized void f() {

for(int i = 0; i < 5; i++) {

System.out.println("f()");

Thread.yield();

}

}

public void g() {

synchronized(syncObject) {

for(int i = 0; i < 5; i++) {

System.out.println("g()");

Thread.yield();

}

}

}

}

public class SyncObject {

public static void main(String[] args) {

final DualSynch ds = new DualSynch();

new Thread() {

@Override

public void run() {

ds.f();

}

}.start();

ds.g();

}

}

/* Output:

g()

g()

g()

g()

g()

f()

f()

f()

f()

f()

*/