创建线程的四种方式
(1)继承Thread类
(2)实现Runnable接口
(3)实现Callable接口
(4)使用线程池
1 package com.example.concurrency; 2 3 import java.util.concurrent.Callable; 4 import java.util.concurrent.ExecutionException; 5 import java.util.concurrent.Executor; 6 import java.util.concurrent.ExecutorService; 7 import java.util.concurrent.Executors; 8 import java.util.concurrent.Future; 9 import java.util.concurrent.FutureTask; 10 //第一种：继承Thread类 11 class MyThread extends Thread { 12 public void run() { 13 System.out.println("线程调用"); 14 } 15 } 16 17 //第二种，实现Runnable接口 18 class MyRunnable implements Runnable { 19 private Boolean tag = true; 20 21 @Override 22 public void run() { 23 // TODO Auto-generated method stub 24 int i = 0; 25 while (tag) { 26 System.out.println("线程调用:" + i++); 27 } 28 } 29 30 public void stop() { 31 this.tag = false; 32 } 33 } 34 35 //第三种：实现Callable接口 36 class MyCallable implements Callable<Integer> { 37 38 @Override 39 public Integer call() throws Exception { 40 // TODO Auto-generated method stub 41 System.out.println("线程调用，返回123"); 42 return 123; 43 } 44 45 } 46 47 //创建线程的四种方式 48 public class demo05 { 49 50 public static void main(String[] args) throws InterruptedException, ExecutionException { 51 // 方式一：继承Thread类 52 MyThread thread3 = new MyThread(); 53 thread3.start(); 54 55 // 方式二：实现Runnable接口 56 MyRunnable instance = new MyRunnable(); 57 Thread thread = new Thread(instance); 58 thread.start(); 59 60 // 方式三-实现Callable接口： 61 MyCallable mc = new MyCallable(); 62 FutureTask<Integer> ft = new FutureTask<Integer>(mc); 63 Thread thread2 = new Thread(ft); 64 thread2.start(); 65 66 // 方式四-使用线程池： 67 ExecutorService ser = Executors.newFixedThreadPool(1);// 线程池 68 Future<Integer> ft2 = ser.submit(mc);// 执行线程 69 Integer result = ft2.get();// 获取结果 70 ser.shutdown();// 关闭 71 } 72 }
