Multithreading in Java

1, the main method in the thread

A) isAlive () determines whether the thread is still alive, i.e. whether the thread is not terminated

b) getpriority () Gets the priority of the thread

c) setpriority () sets the priority of the thread

d) Thread.Sleep () sets the time that the thread sleeps

e) jion () merges the current thread with the thread

f) yield () Give Cup

g) Priority of threads

I. thread.min_priority = 1 Minimum priority

II. thread.norm_priority = 5 Default Priority

Iii. thread.max_priority = 10 Maximum priority

2. Interrupt of Thread

A) Stop () is obsolete and basically does not

b) Interrupt () Simple, rough

c) It is recommended to use the SET flag bit

3. Advanced operation of Thread

A) wait () waits for the current thread until it wakes up by its thread

b) Notify () wake-up waiting thread

4, the realization of two ways of synchronization (mainly the use of synchronized)

A) lock code block

I. Synchronized (object) {block of code to lock}

b) Lock method (recommended)

I. Synchronized void method () {}

1, Java Multi-threading implementation of the main two ways, one by inheriting the thread class, one is the implementation of the Runnable interface. The main use of two methods when using multi-threading is to override the run () method to implement the code that will be executed. The second method is start (), which is used to start a thread.

2, the implementation of the thread class

1 public class Threaddemo extends thread{

2

3 public void Run () {

4 for (int i = 0; i <; i++) {

5 System.out.println (Thread.CurrentThread (). GetName () +i);

6}

7}

8 public static void Main (string[] args) {

9

Ten Threaddemo TD1 = new Threaddemo ();

Td1.setname ("Thread 1:");

12

Threaddemo TD2 = new Threaddemo ();

Td2.setname ("Thread 2:");

15

16//Get Priority

System.out.println ("Line Cheng priority is:" +td1.getpriority ());

18

19//Set the priority priority of the thread to a value of 0-10 from small to large

Td1.setpriority (min_priority);

Td2.setpriority (max_priority);

22

Td1.start ();

Td2.start ();

25

26

27}

28

29}

1, the implementation of Runnable interface

1 ublic static void Main (string[] args) {

2 ticketrunnable tr = new ticketrunnable ();

3

4 Thread TD1 = new Thread (TR);

5 td1.setname ("Window 1");

6 Thread TD2 = new Thread (TR);

7 td2.setname ("Window 2");

8 Thread td3 = new Thread (TR);

9 Td3.setname ("Window 3");

10

Td1.start ();

Td2.start ();

Td3.start ();

14}

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Multithreading in Java