Thread-safe and thread synchronization in Java and iOS

Thread safety in Java is synchronized with threads:

1. Create a thread to implement the class MyThread, as the threading body;
2. Create a Test class, generate two thread objects in the main function, two objects common one line Cheng (MyThread object);
3. Thread safety: Avoid multiple threads accessing unified resources at the same time;
4. Solution: Add synchronous lock; Synchronized (this) {The resource to be accessed;}

Thread-safe synchronization with threads in IOS

1. Thread Safety: The same resource can only allow access to one thread at a time of unification
2. Workaround:
1. Method One: Add the sync lock @synchronized (self) {the resource to access;}
2. Method Two: Use lock class Nslock;  Nslock *alock; [Alock Lock]; The resources to be accessed; [Alock UnLock];

Thread-safe and thread synchronization in Java and iOS