Multithreading [base]

[Base] multithreading

Tags (separated by spaces): javaweb multithreading

---

1, the concept of threads

    简单理解，一个客户端可以同时做很多事，就是多线程

2, create a thread (three ways)

1. Inherit the Thread class, for example:

   //继承Thread类，并且重写run方法
   public class LitterThread extends Thread {
       private String myName;
       private int num=5;
   
       public String getMyName() {
           return myName;
       }
   
       public void setMyName(String myName) {
           this.myName = myName;
       }
   
       @Override
       public void run() {
           super.run();
           while(num>0)
           {
               System.out.println("现在是"+this.myName+"执行啦");
               num--;
           }
       }
   }

   //实例化该线程并且调用改start方法
   public class TestThread {
       public static void main(String[] args) {
           LitterThread lt1=new LitterThread();
           lt1.setMyName("1111");
           lt1.start();
           LitterThread lt2=new LitterThread();
           lt2.setMyName("2222");
           lt2.start();   
       }
   }

2. Inherit the Thread class, for example:

   //自定义继承Runnable的类
   public class MyThread implements Runnable{
       private String myName;
       private int num=5;
   
       public String getMyName() {
           return myName;
       }
   
       public void setMyName(String myName) {
           this.myName = myName;
       }
   
       @Override
       public void run() {
           while(num>0)
           {
               System.out.println("现在是"+this.myName+"执行啦");
               num--;
           }
       }
   
   }

   //测试类用例
   public class TestThread {
       public static void main(String[] args) {
   
           MyThread lt1=new MyThread();
           lt1.setMyName("1111");
           new Thread(lt1).start();
           MyThread lt2=new MyThread();
           lt2.setMyName("2222");
           new Thread(lt2).start();  
       }
   }

3. Anonymous class

   to do more···