//创建线程方式一步骤：继承Thread类，重写run方法，调用start开启线程

 public class test01 extends Thread{

     @Override

     public void run() {

         for (int i = 0; i < 10;i++){

             System.out.println("run方法执行..." + i);

         }

     }

     public static void main(String[] args) {

         //创建线程对象

         test01 t1 = new test01();

         //开启线程

         t1.start();

         for (int i = 0; i < 1000; i++){

             System.out.println("main方法执行..." + i);

         }

     }

 }

    <dependency>

       <groupId>commons-io</groupId>

       <artifactId>commons-io</artifactId>

       <version>2.6</version>

     </dependency>

 /**

  * 使用多线程下载图片

  * @author USTC_WZH

  * @create 2019-12-05 11:26

  */

 public class test02 extends Thread {

     //图片url地址

     private String url;

     //保存的文件名

     private String name;

     public test02(String url, String name) {

         this.url = url;

         this.name = name;

     }

     @Override

     public void run() {

         WebDownloader webDownloader = new WebDownloader();

         webDownloader.downloader(url, name);

         System.out.println("下载文件名：" + name);

     }

     public static void main(String[] args) {

         test02 t1 = new test02("http://lswhw.ustc.edu.cn/upload/20150427/20150427102635.jpg", "images/图片1.jpg");

         test02 t2 = new test02("http://lswhw.ustc.edu.cn/upload/20150427/20150427103657.jpg", "images/图片2.jpg");

         test02 t3 = new test02("http://lswhw.ustc.edu.cn/upload/20150427/20150427103010.jpg", "images/图片3.jpg");

         t1.start();

         t2.start();

         t3.start();

     }

 }

 class WebDownloader {

     public void downloader(String url, String name) {

         try {

             FileUtils.copyURLToFile(new URL(url), new File(name));

         } catch (IOException e) {

             e.printStackTrace();

             System.out.println("downloader方法出现异常");

         }

     }

 }

 /**

  * 创建线程方法二步骤：

  *          1.实现Runnable接口，重写run方法。

  *          2.执行线程需要丢入runnable接口的实现类。

  *          3.调用start方法。

  * @author USTC_WZH

  * @create 2019-12-05 14:14

  */

 public class test03 implements Runnable{

     @Override

     public void run() {

         for (int i = 0; i < 10;i++){

             System.out.println("run方法执行..." + i);

         }

     }

     public static void main(String[] args) {

         //创建runnable接口的实现类对象

         test01 t1 = new test01();

         //创建线程对象，通过线程对象来开启我们的线程，代理模式

         new Thread(t1).start();

         for (int i = 0; i < 1000; i++){

             System.out.println("main方法执行..." + i);

         }

     }

 }

 /**

  * 模拟买火车票

  *

  * @author USTC_WZH

  * @create 2019-12-05 14:32

  */

 public class testerror implements Runnable {

     //火车票个数

     private int ticketNums = 10;

     @Override

     public void run() {

         while (true) {

             if (ticketNums <= 0) {

                 break;

             }

             //模拟延时

             try {

                 Thread.sleep(100);

             } catch (InterruptedException e) {

                 e.printStackTrace();

             }

             System.out.println(Thread.currentThread().getName() + "-->拿了第" + ticketNums-- + "票");

         }

     }

     public static void main(String[] args) {

         testerror t = new testerror();

         new Thread(t, "小明").start();

         new Thread(t, "小红").start();

         new Thread(t, "花花").start();

     }

 }

 package ustc.wzh.callable;

 import org.apache.commons.io.FileUtils;

 import java.io.File;

 import java.io.IOException;

 import java.net.URL;

 import java.util.concurrent.*;

 /**

  * @author USTC_WZH

  * @create 2019-12-05 14:44

  * <p>

  * 创建线程方式三步骤：

  * 1.实现Callable接口，需要返回值类型

  * 2.重写call方法，需要抛出异常

  * 3.创建目标对象

  * 4.创建执行服务

  * 5.提交执行

  * 6.获取结果

  * 7.关闭服务

  */

 //1.实现Callable接口

 public class testCallable implements Callable<Boolean> {

     //图片url地址

     private String url;

     //保存的文件名

     private String name;

     public testCallable(String url, String name) {

         this.url = url;

         this.name = name;

     }

     //2.重写call方法

     @Override

     public Boolean call() throws Exception {

         WebDownloader webDownloader = new WebDownloader();

         webDownloader.downloader(url, name);

         System.out.println("下载文件名：" + name);

         return true;

     }

     public static void main(String[] args) throws ExecutionException, InterruptedException {

         //创建目标对象

         testCallable t1 = new testCallable("http://lswhw.ustc.edu.cn/upload/20150427/20150427102635.jpg", "images/图片1.jpg");

         testCallable t2 = new testCallable("http://lswhw.ustc.edu.cn/upload/20150427/20150427103657.jpg", "images/图片2.jpg");

         testCallable t3 = new testCallable("http://lswhw.ustc.edu.cn/upload/20150427/20150427103010.jpg", "images/图片3.jpg");

         //4.创建执行服务

         ExecutorService ser = Executors.newFixedThreadPool(3);

         //5.提交执行

         Future<Boolean> r1 = ser.submit(t1);

         Future<Boolean> r2 = ser.submit(t2);

         Future<Boolean> r3 = ser.submit(t3);

         //6.获取结果

         boolean rs1 = r1.get();

         boolean rs2 = r2.get();

         boolean rs3 = r3.get();

         System.out.println("rs1=" + rs1 + ",rs2=" + rs2 + ",rs3=" + rs3);

         //7.关闭服务

         ser.shutdownNow();

     }

 }

 class WebDownloader {

     public void downloader(String url, String name) {

         try {

             FileUtils.copyURLToFile(new URL(url), new File(name));

         } catch (IOException e) {

             e.printStackTrace();

             System.out.println("downloader方法出现异常");

         }

     }

 }