第一篇 多线程（一）

package com.zzp.thread;
/**
 * 
 * 创建线程：方式一
 * 1、继承thread类，重写run方法
 * 2、启动线程，调用start方法
 * 
 * @author java
 *
 */
public class StartThread extends Thread{
    //重写run()
    @Override
    public void run() {
        for(int i=0;i<10;i++){
            System.out.println("一边学习");
        }
    }

    public static void main(String[] args) {
        //创建Thread子类对象
        StartThread st = new StartThread();
        //启动，并不是立即启动，而是等待cpu调用，至于CPU何时调用，不知道
        //开启线程的时机很重要
        st.start();
        //如果直接调用run()方法，则是普通方法调用，不是开启多线程
        //st.run();
        
        for(int i=0;i<10;i++){
            System.out.println("一边听歌");
        }
    }
}

 

package com.zzp.thread;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.io.FileUtils;

/**
 * 
 * 下载工具类
 * @author java
 *
 */
public class WebDownLoader {
    public void downLoader(String url,String name){
        try {
            FileUtils.copyURLToFile(new URL(url), new File(name));
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

package com.zzp.thread;
/**
 * 
 * 创建图片下载的线程
 * @author java
 *
 */
public class TDownLoader extends Thread{
    private String url;
    private String name;
    
    public TDownLoader(String url, String name) {
        super();
        this.url = url;
        this.name = name;
    }
    //重写run()
    @Override
    public void run() {
        WebDownLoader wd = new WebDownLoader();
        wd.downLoader(url, name);
    }
    
    public static void main(String[] args) {
        TDownLoader td1 = new TDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%AE%88%E7%A0%B4%E7%A6%BB&step_word=&hs=0&pn=1&spn=0&di=79296871830&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=1435309020%2C3477682663&os=1841078546%2C3614953869&simid=4194686237%2C632091804&adpicid=0&lpn=0&ln=104&fr=&fmq=1536156608183_R&fm=&ic=undefined&s=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Ft2.qpic.cn%2Fmblogpic%2Fee290b3b55e018eb8fac%2F2000&fromurl=ippr_z2C%24qAzdH3FAzdH3Fr_z%26e3Bp_z%26e3Bqq_z%26e3Bv54AzdH3Fs5g2ojtk5AzdH3Frw2j_z%26e3Brir%3Ft1%3Dn8bdcba9acn0cl9%26st1%3D8b989dd8mbcdalmcl8db&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","spl.jpg");
        TDownLoader td2 = new TDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=false&word=%E6%9D%8E%E5%B0%8F%E9%BE%99&step_word=&hs=0&pn=0&spn=0&di=94581897410&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2752933258%2C795342213&os=1992076552%2C3728441564&simid=3465896125%2C219929152&adpicid=0&lpn=0&ln=3370&fr=&fmq=1536156674237_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=star&bdtype=0&oriquery=&objurl=http%3A%2F%2Fimgcache.cjmx.com%2Fstar%2F201607%2F20160719231717732.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Ffpw6_z%26e3Bv34x_z%26e3Bv54AzdH3Fda8ma0AzdH3F8abdba8_z%26e3Bfip4s&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","lxl.jpg");
        TDownLoader td3 = new TDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%B2%B3%E5%8D%97%E7%90%86%E5%B7%A5%E5%A4%A7%E5%AD%A6&step_word=&hs=0&pn=0&spn=0&di=115015699590&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=3620107849%2C3756859208&os=1374852277%2C1275983326&simid=4171483572%2C611783800&adpicid=0&lpn=0&ln=1851&fr=&fmq=1536156735988_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fimg.gaosan.com%2Fupload%2Fwebimg%2F1785.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3B2w5fwg_z%26e3Bv54AzdH3F2w5hw5AzdH3F88d0la_z%26e3Bip4s&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","lgd.jpg");
        
        td1.start();
        td2.start();
        td3.start();
    }
    
}

 

package com.zzp.thread;
/**
 * 
 * 创建线程：方式二
 * 1、实现runnable接口，重写run方法
 * 2、启动线程+thread类+调用start方法
 * 推荐使用，避免单继承造成的局限性
 * @author java
 *
 */
public class StartRun implements Runnable{
    //重写run()
    @Override
    public void run() {
        for(int i=0;i<10;i++){
            System.out.println("一边学习");
        }
    }

    public static void main(String[] args) {
        //创建Thread子类对象
        //StartRun sr = new StartRun();
        //创建Thread类对象
        //Thread t = new Thread(sr);
        //启动，并不是立即启动，而是等待cpu调用，至于CPU何时调用，不知道
        //开启线程的时机很重要
        //t.start();
        //如果直接调用run()方法，则是普通方法调用，不是开启多线程
        //st.run();
        
        //如果创建的对象只用一次
        new Thread(new StartRun()).start();
        
        for(int i=0;i<10;i++){
            System.out.println("一边听歌");
        }
    }
}

package com.zzp.thread;
/**
 * 
 * 创建图片下载的线程
 * @author java
 *
 */
public class IDownLoader implements Runnable{
    private String url;
    private String name;
    
    public IDownLoader(String url, String name) {
        super();
        this.url = url;
        this.name = name;
    }
    //重写run()
    @Override
    public void run() {
        WebDownLoader wd = new WebDownLoader();
        wd.downLoader(url, name);
    }
    
    public static void main(String[] args) {
        IDownLoader td1 = new IDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%AE%88%E7%A0%B4%E7%A6%BB&step_word=&hs=0&pn=1&spn=0&di=79296871830&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=1435309020%2C3477682663&os=1841078546%2C3614953869&simid=4194686237%2C632091804&adpicid=0&lpn=0&ln=104&fr=&fmq=1536156608183_R&fm=&ic=undefined&s=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Ft2.qpic.cn%2Fmblogpic%2Fee290b3b55e018eb8fac%2F2000&fromurl=ippr_z2C%24qAzdH3FAzdH3Fr_z%26e3Bp_z%26e3Bqq_z%26e3Bv54AzdH3Fs5g2ojtk5AzdH3Frw2j_z%26e3Brir%3Ft1%3Dn8bdcba9acn0cl9%26st1%3D8b989dd8mbcdalmcl8db&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","spl.jpg");
        IDownLoader td2 = new IDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=false&word=%E6%9D%8E%E5%B0%8F%E9%BE%99&step_word=&hs=0&pn=0&spn=0&di=94581897410&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2752933258%2C795342213&os=1992076552%2C3728441564&simid=3465896125%2C219929152&adpicid=0&lpn=0&ln=3370&fr=&fmq=1536156674237_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=star&bdtype=0&oriquery=&objurl=http%3A%2F%2Fimgcache.cjmx.com%2Fstar%2F201607%2F20160719231717732.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Ffpw6_z%26e3Bv34x_z%26e3Bv54AzdH3Fda8ma0AzdH3F8abdba8_z%26e3Bfip4s&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","lxl.jpg");
        IDownLoader td3 = new IDownLoader("https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%B2%B3%E5%8D%97%E7%90%86%E5%B7%A5%E5%A4%A7%E5%AD%A6&step_word=&hs=0&pn=0&spn=0&di=115015699590&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=3620107849%2C3756859208&os=1374852277%2C1275983326&simid=4171483572%2C611783800&adpicid=0&lpn=0&ln=1851&fr=&fmq=1536156735988_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fimg.gaosan.com%2Fupload%2Fwebimg%2F1785.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3B2w5fwg_z%26e3Bv54AzdH3F2w5hw5AzdH3F88d0la_z%26e3Bip4s&gsm=0&rpstart=0&rpnum=0&islist=&querylist=","lgd.jpg");
        
        new Thread(td1).start();
        new Thread(td2).start();
        new Thread(td3).start();
    }
    
}

 

package com.zzp.thread;
/**
 * 
 * 共享资源，会出现并发问题（后面要确保线程安全）
 * @author java
 *
 */
public class Web12306 implements Runnable{
    private int tikectsNum = 99;
    @Override
    public void run() {
        while(true){
            if(tikectsNum < 0){
                break;
            }
            //当设置线程延迟的时候，就会出现线程不安全的情况
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"--->"+tikectsNum--);
        }
    }
    public static void main(String[] args) {
        //一份资源
        Web12306 wb = new Web12306();
        //多份代理
        new Thread(wb,"码农").start();
        new Thread(wb,"马云").start();
        new Thread(wb,"麻黄").start();
    }
}

package com.zzp.thread;
/**
 * 
 * 模拟龟兔赛跑
 * @author java
 *
 */
public class Racer implements Runnable{
    private static String winner;
    @Override
    public void run() {
        for(int i=1;i<=100;i++){
            //兔子每走10步，休息一次
            /*if(Thread.currentThread().getName().equals("兔子") && (i%10 == 0)){
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }*/
            System.out.println(Thread.currentThread().getName()+"-->"+i);
            boolean flag = gameOver(i);
            if(flag){
                break;
            }
        }
        
    }
    public boolean gameOver(int i){
        if(winner != null){
            return true;
        }else{
            if(i==100){
                winner = Thread.currentThread().getName();
                System.out.println("winner:"+winner);
                return true;
            }
        }
        return false;
    }
    
    public static void main(String[] args) {
        Racer rc = new Racer();
        new Thread(rc,"乌龟").start();
        new Thread(rc,"兔子").start();
    }
}