线程笔记

1.java中有Thread 和 Runnable两种实现线程的方式。

　

package thread;

public class MyThread extends Thread{
 private String name;
 private int tick = 10;
 public MyThread(String name){
  this.name = name;
 }
 public void run (){
  for(int i = 1;i <= tick;i ++){
   System.out.println("线程开始："+this.name+" " +i);
  }
 }
 
 public static void main(String[] args) {
  MyThread t1 = new MyThread("线程A");
  MyThread t2 = new MyThread("线程B");
  MyThread t3 = new MyThread("线程C");
//  t1.run();
//  t2.run();
  t1.start();
  t2.start();
  t3.start();
 }
}

package thread;
public class MyRunnable implements Runnable{
 private String name;
 private int tick = 10;
 public MyRunnable(String name){
  this.name = name;
 }
 public void run() {
  
  for(int i = 0;i < 20 ;i ++){
   if(tick>0)
   System.out.println(this.name + tick--);
  }
 }
 public static void main(String[] args) {
  MyRunnable mr1 = new MyRunnable("A");
 // MyRunnable mr2 = new MyRunnable("B");
  mr1.run();
 // mr2.run();
  new Thread(mr1).start();
  new Thread(mr1).start();
  new Thread(mr1).start();
 }
}

线程池：

package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ExecuteServiceTest {
 public static void main(String[] args) {
  ExecutorService threadPool = Executors.newCachedThreadPool();
  /**
   * 缓存线程池
   */
  for(int i = 0;i < 10;i ++){
   threadPool.execute(new Runnable(){
    
    public void run(){
     for(int i = 0;i < 10;i ++){
      System.out.println(Thread.currentThread().getName());
      
      try {
       Thread.sleep(20);
      } catch (InterruptedException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
     
    }
   });
  }
 
 }
}