Java Getting Started notes 6_ threads

1. Multithreading
1.1 Creating a thread class
In Java, you can simply inherit from the thread class to create your own threading class:
public class Myfirstthread extends Thread {
public void Run () {...}
}
Description
(1) The thread class bit is Java.lang package, so you can not display import;
(2) classes inherited from the thread class are best overloaded with the run () method to run the required code;
You can instantiate and run the thread in the following ways:
Myfirstthread amft = new Myfirstthread ();
Amft.start ();
Description
(3) After instantiating the thread class, the system initializes some parameters, mainly creating a name for the thread, adding a new thread to the specified thread group, initializing the memory space required for the thread to run, specifying the priority level of the new thread, and specifying its waiting thread;
(4) The Start method is a method in the thread class that invokes the Run method and runs the specified code in a new thread;
(5) In addition to the Start method, the classes inherited from thread also have some other main methods: Stop,suspend,resume;
The following is a complete thread-derived class:
1:public class Complexthread extends Thread {
2:private int delay;
3:
4:complexthread (String name, float seconds) {
5:super (name);
6:delay = (int) seconds * 1000; Delays are in milliseconds
7:start (); Start Up ourself!
8:}
9:
10:public void Run () {
11:while (True) {
12:system.out.println (Thread.CurrentThread (). GetName ());
13:try {
14:thread.sleep (delay);
:} catch (Interruptedexception e) {
16:return;
17:}
18:}
19:}
20:
21:public static void Main (String argv[]) {
22:new complexthread ("One Potato", 1.1F);
23:new complexthread ("Two potato", 1.3F);
24:new complexthread ("Three potato", 0.5F);
25:new Complexthread ("Four", 0.7F);
26:}
27:}
1.2 Runable interface
Another way to create a multithreaded run of the specified code is to implement runable this interface when the class is created: