Java multi-thread learning and application

Java implements multithreading in two ways:

1. inherit the Thread class and override the run method.

 Package  Com. bjdata. test;  Public   Class Threadtest Extends  Thread {string name = "" ;  Public  Threadtest (string N) {name = N ;}  Public   Void  Run (){ For ( Int I = 0; I <6; I ++ ) {System. Out. println (name + ": Hello:" + I );}}  Public   Static   Void  Main (string [] ARGs) {threadtest test1 = New Threadtest ("" ); Threadtest Test2 = New Threadtest ("B" ); Test1.start (); test2.start ();}} 

Note:ProgramThe start method instead of the run method is called during running.

First running result:

 
A: Hello: 0B: Hello:0B: Hello:1B: Hello:2B: Hello:3B: Hello:4B: Hello:5A: Hello:1A: Hello:2A: Hello:3A: Hello:4A: Hello:5
 

The second running result:

B: Hello: 0B: Hello:1B: Hello:2B: Hello:3B: Hello:4B: Hello:5A: Hello:0A: Hello:1A: Hello:2A: Hello:3A: Hello:4A: Hello:5
 

The two running results are inconsistent, indicating that our goal has been achieved

2. Implement runnable

 Package  Com. bjdata. test;  Public   Class Runabletest Implements Runnable {string name = "" ;  Public  Runabletest (string N) {name = N ;}  Public   Void  Run (){  For ( Int I = 0; I <6; I ++ ) {System. Out. println (name + ": Hello:" + I );}}  Public  Static   Void  Main (string [] ARGs) {runabletest test1 = New Runabletest ("" ); Runabletest Test2 = New Runabletest ("B" ); Thread thread1 = New  Thread (test1); thread thread2 = New  Thread (Test2); thread1.start (); thread2.start ();}} 

First running result

A: Hello: 0A: Hello:1A: Hello:2A: Hello:3A: Hello:4A: Hello:5B: Hello:0B: Hello:1B: Hello:2B: Hello:3B: Hello:4B: Hello:5
 

Second run

A: Hello: 0A: Hello:1A: Hello:2B: Hello:0B: Hello:1B: Hello:2B: Hello:3B: Hello:4B: Hello:5A: Hello:3A: Hello:4A: Hello:5
 

Note: During running, you must first create a thread object, pass the example that requires multi-thread running, and then call the thread run method.