Two ways to create a thread compare thread VS Runnable

1. First of all, two ways to create a thread

One way is to inherit the thread class and override the run () method

1 public class MyThread extends thread{2     @Override 3 public     void Run () {4         //TODO auto-generated method stub 5          6     } 7} 8//thread using 9 MyThread mt = new MyThread ();  Create thread Mt.start ();                   Start thread

Another way is to implement the Runnable interface

1 public class MyThread implements runnable{2     @Override 3 public     void Run () {4         //TODO auto-generated Metho D stub 5          6     } 7} 8//thread using 9 MyThread mt = new MyThread (), Thread thread = new Thread (MT),//create thread one by one Thread.Start ();                   Start thread

2. Two ways to create a thread comparison

1th: Through the creation of threads can be seen, one is to inherit one is to implement the interface, but Java can only inherit a parent class, it is possible to implement a feature of multiple interfaces, so the use of runnable method can avoid the thread mode due to Java single inheritance caused by the flaw.

2nd: runnable code can be shared by multiple threads (thread instances) and is suitable for multiple threads to handle uniform resources.

Example: Simulated sell tickets, assuming that there are 5 tickets left, two ways to create a threading simulation

Ticketthread.java//The case of using inheritance to simulate 3 windows selling 5 tickets

1 public class Ticketthread {2 public     static void Main (string[] args) {3         //Create 3 threads, simulate three windows sell ticket 4         MyThread MT1 = New MyThread ("Thread One"); 5         MyThread mt2 = new MyThread ("Thread Two"), 6         MyThread mt3 = new MyThread ("Thread Three"), 7          8         //boot thread 9         mt1.start ();         Mt2.start (),         Mt3.start (),     }13}15, class MyThread extends thread{17     private int num = 5;//mode There are 5 tickets left. The     private String name;//is used to indicate the thread name,     MyThread (string name) {         this.name = name;     @Override25 public     Void Run () {}23         (num > 0) {             num--;28             System.out.println (name+ "sold a ticket, the remaining votes are" +num);         }30     }31}

The result of the operation is:

1 Thread one sold a ticket, the remaining votes are 4 2 thread one sold a ticket, the remaining votes are 3 3 thread one sold a ticket, the remaining votes of 2 4 thread one sold a ticket, the remaining votes of 1 5 thread one sold a ticket, the remaining votes of 0 6 thread two sold a ticket, the remaining votes of 4 7 thread two sold One ticket, the remaining votes are 3 8 thread two sold a ticket, the remaining votes are 2 9 thread two sold a ticket, the remaining votes of 110 thread two sold a ticket, the remaining votes of 011 thread three sold a ticket, the remaining votes of 412 thread three sold a ticket, the remaining votes of 313 thread three sold a ticket, The remaining votes are 214 threads three sold a ticket, the remaining votes of 115 thread three sold a ticket, the remaining votes of 0

You can see that 15 tickets have been sold, and 5 tickets have been turned into each thread.

Ticketrunnable.java//with runnable implementation

1 public class tickerrunnable{2 public     static void Main (string[] args) {3         MyThread mt = new MyThread (); 4         // Also create 3 threads of 5 thread         t1 = new Thread (MT, "thread One"), 6         thread t2 = new Thread (MT, "thread Two"), 7         thread t3 = new Thread (MT , "thread Three"); 8         //Start thread 9         t1.start ();         T2.start ();         T3.start ();     }13}15 class MyThread implements RUNNABLE{17     private int num = 5;//simulation also has 5 tickets remaining     @Override20 public     void Run () {         > 0) {             num--;23             System.out.println (Thread.CurrentThread () getName () + "sold a ticket with the remaining votes" +num);     }26}

The result of the operation is:

1 Thread one sold a ticket, the remaining votes of 42 thread three sold a ticket, the remaining votes of 33 thread three sold a ticket, the remaining votes of 14 thread two sold a ticket, the remaining votes of 05 thread one sold a ticket, the remaining votes of 2

This shows that multiple threads share the 5 variable in the Runnbale, as to why the result is not the output of the remaining votes 4 3 2 1 0, this is due to thread scheduling problems, each run will see a different result.

Two ways to create a thread compare thread VS Runnable