Thread safe without using synchronization

[swetu.vc]

I am using normal method in multi threaded env. I need to make the method thread safe without using synchronization. Please suggest.

[mrmatt1111]

Use a semaphore then. Or you can use a inner synchronize:

private Object lock = new Object();

...

public void myFunction()
{
   ...
   synchronized(lock)
   {
      ...
   }
   ...
}

[Cbani]

without using synchronized keyword you can do in this below way

public class Singleton {
// Private constructor prevents instantiation from other classes
private Singleton() {}

/**
* SingletonHolder is loaded on the first execution of Singleton.getInstance()
* or the first access to SingletonHolder.INSTANCE, not before.
*/
private static class SingletonHolder {
private static final Singleton INSTANCE = new Singleton();
}

public static Singleton getInstance() {
return SingletonHolder.INSTANCE;
}
}

please go through this link for better idea : Using Synchronized keyword in Singleton Design Pattern

[Cbani]

so in the above code snippet getInstance() is a thread safe method....