Multithreading and concurrency

There are three ways to create a thread ：

1 Inherit Thread class :

2 Realization Runnable Interface :

3 Realization callable Interface :

1. Inherit Thread class ：

First 1. Inherit Thread class

secondly 2. rewrite run Method

Last 3. class .start Open thread

2 Realization Runnable Interface :

1 Definition MyRunnable Class implementation Runnable Interface
2 rewrite run() Method , Write thread executor
3 Creating thread objects , call start() Method to start the thread

problem ： When multiple threads operate on the same resource It will cause thread insecurity Data disorder

Realization Callable Interface * understand