# University # Java multithreading 01

* Java multithreading is basically implemented through the Thread class and runnable interface.

* Thread class Method

* Constructor

Thread ();

Thread (runnable); // used together with the interface, mainly to help the interface implement the START () method, because the runnable interface does not have the start Method

Thread (string name); // thread name

Thread (runnable, string name); // 4 = 2 + 3

* Other Methods

Start (); // start the thread

Interrupt ();//

Join (); // call other threads

Run (); // thread body

Sleep (long time); // sets the thread sleep time.

Wait (long time); // = sleep (long time)

Wait ();

Y (); // activates the thread, which is generally used with wait ().

Policyall ();

Isalive (); // check the thread status

Stop (); // force the thread to die

* The runnable interface has only one run () method. Therefore, interfaces are generally used together with tread objects.

 

* Thread Lifecycle

Create; // put the statements that require multi-thread execution into the run method.

Executable; // when the thread enables the START () method, it enters the executable state and executes the run () method.

Non-executable; // you can use the wait () and sleep () methods in the tread class to enter the "non-executable state ".

Dying; // when the run method is executed, the thread automatically disappears.

* Thread priority

The setpriority () method in the Thread class can be used to set the thread priority. The value range is 1 ~ 10. The default value is 5.

* Daemon

If all non-Background threads are finished, the background threads will also be terminated automatically.

Thread. setdaemon (Boolean on); // when the parameter is true, the thread is marked as the background thread.

Thread. isdaemon (); // determines whether the thread is a background thread.