And the difference between the runnable thread
Reference: https: //cloud.tencent.com/developer/article/1353432
Knowledge points:
1.Java is a single inheritance, implement, if the class implements multithreading has inherited the other categories, it can not inherit the class thread;
2. override run method or implemented as the run method is run inside the encapsulation method is a code block to be executed by multi-thread;
3. Start the thread object is called the start method, start method to start the thread, run another method called by jvm;