多线程

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1、java中线程的实现 继承Thread

package com.test;public class MyThread extends Thread{private String name;public MyThread(String name){this.name = name;}public void run(){for(int i=0;i<10;i++){System.out.println(name+"运行,i="+i);}}}

主类为：

package com.test;public class Main{public static void main(String[] args){getMyThread();}public static void getMyThread(){MyThread mt1 = new MyThread("线程A");MyThread mt2 = new MyThread("线程B");mt1.start();mt2.start();}}

2、实现Runnable接口

实现Runnable接口可以实现资源共享：

package com.test;public class MyRunnable implements Runnable{private int ticket = 5;public void run(){for(int i=0;i<100;i++){if(ticket>0){System.out.println("卖票：ticket="+ticket--);}}}}

public static void main(String[] args){getRunnable();}public static void getRunnable(){MyRunnable my = new MyRunnable();new Thread(my).start();new Thread(my).start();new Thread(my).start();}

3、经典线程操作案例——生产者及消费者问题

生产的信息Info类：

package com.test;public class Info{private String name = "李老师";private String content = "Java老师";private boolean flag = false;//设置标志//加入同步public synchronized void set(String name,String content){if(!flag){try{super.wait();//加入等待} catch (Exception e){// TODO: handle exception}}this.setName(name);try{Thread.sleep(3000);//线程休眠3秒} catch (Exception e){// TODO: handle exception}this.setContent(content);flag = false;//修改标志位，表示可以取走super.notify();//唤醒等待线程}//加入同步public synchronized void get(){if(flag){try{super.wait();//加入等待} catch (Exception e){// TODO: handle exception}}try{Thread.sleep(3000);//线程休眠3秒} catch (Exception e){// TODO: handle exception}System.out.println(this.getName()+"--->"+this.getContent());flag = true;//修改标志位为true，表示可以生产super.notify();//唤醒等待线程}public String getName(){return name;}public void setName(String name){this.name = name;}public String getContent(){return content;}public void setContent(String content){this.content = content;}}

生产者类Producer：

package com.test;public class Producer implements Runnable{private Info info = null;public Producer(Info info){this.info = info;}@Overridepublic void run(){// TODO Auto-generated method stubboolean flag = false;for(int i= 0 ;i<50;i++){if(flag){this.info.set("李老师", "Java讲师");flag = false;}else {this.info.set("庐山", "美丽的风景区");flag = true;}}}}

消费者类Customer：

package com.test;public class Customer implements Runnable{private Info info = null;public Customer(Info info){this.info = info;}@Overridepublic void run(){// TODO Auto-generated method stubfor(int i = 0;i<50;i++){try{Thread.sleep(100);} catch (Exception e){// TODO: handle exception}this.info.get();}}}

主类：

public class Main{public static void main(String[] args){Info info = new Info();Producer producer = new Producer(info);Customer customer = new Customer(info);new Thread(producer).start();new Thread(customer).start();}}