JAVA生产者与消费者案例

Student.java

package cn.itcast.productAndConsumer;

public class Student {
	private String name;
	private int age;
	private boolean flag;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public boolean isFlag() {
		return flag;
	}
	public void setFlag(boolean flag) {
		this.flag = flag;
	}
}

SetThread.java

package cn.itcast.productAndConsumer;

public class SetThread implements Runnable {	
	private Student s;
	private int x = 0;
	
	public SetThread(Student s) {
		super();
		this.s = s;
	}

	@Override
	public void run() {
		while (true) {
			synchronized (s) {				
				//判断生产者有没有生产好数据
				if(s.isFlag()){
					try {
						s.wait();      // 线程执行wait方法，就会立即释放锁,将来醒过来的时候，就从这里醒来
					} catch (InterruptedException e) {						
						e.printStackTrace();
					}
				}
				
				if (x % 2 == 0) {
					s.setName("林青霞");
					s.setAge(27);
				}else{
					s.setName("王江");
					s.setAge(18);
				}
				x++;
				
				//生产者生产好了数据 ，打好标记并唤醒消费者的线程
				s.setFlag(true);
				s.notify();
			}
		}
	}
}

GetThread.java

package cn.itcast.productAndConsumer;

public class GetThread implements Runnable {	
	private Student s;	
	
	public GetThread(Student s) {
		super();
		this.s = s;
	}

	@Override
	public void run() {
		while(true){
			synchronized (s) {
				if(!s.isFlag()){
					try {
						s.wait();
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
				System.out.println(s.getName()+"---"+s.getAge());
				
				//消费者消费完了数据，打标记并唤醒生产者线程
				s.setFlag(false);
				s.notify();				
			}			
		}		
	}
}

ProductAndConsumerDemo.java

package cn.itcast.productAndConsumer;
/***
 * 等待唤醒：
 * 		Object类中提供了三个方法：
 * 			wait()        等待
 * 			notify()      唤醒单个线程
 * 			notifyAll()   唤醒所有线程
 * 
 * 		为什么这些方法不定义在Thread类中?
 * 			这些方法的调用必须通过锁对象调用，而我们刚才使用的锁对象是任意锁对象
 * 			所以这些方法必须定义在Object类中
 *
 */
public class ProductAndConsumerDemo {
	public static void main(String[] args) {
		//创建资源
		Student s = new Student();
		
		//生产者和消费者
		SetThread st1 = new SetThread(s);
		GetThread st2 = new GetThread(s);
		
		//线程类
		Thread t1 = new Thread(st1);
		Thread t2 = new Thread(st2);
		
		t1.start();
		t2.start();		
	}	
}

JAVA生产者与消费者案例

猜你喜欢