java 线程（七）等待与唤醒

 

package cn.sasa.demo5;

public class Resources {
    
    private String name;
    private boolean gender;
    
    //标记
    public boolean flag;
    //如果falg==true ,赋值完成
    //如果flag==false 取值完成
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    
    public boolean isGender() {
        return gender;
    }
    public void setGender(boolean gender) {
        this.gender = gender;
    }

    private Resources() {}
    public static final Resources resource = new Resources();
}

 

package cn.sasa.demo5;

public class InputRunnable implements Runnable{
    private Resources rs = Resources.resource;
    @Override
    public void run() {
        int flag = 1000;
        while(flag > 0) {
            synchronized(rs) { //input 和 output 两个线程操作同一个数据源，必须保证同步锁是同一个锁                
                if(rs.flag) {
                    try {
                        rs.wait();
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                if(flag % 2 ==0) {
                    rs.setName("来福");
                    rs.setGender(true);
                }else {
                    rs.setName("wangcai");
                    rs.setGender(false);
                }
                rs.flag=true;
                rs.notify();
                flag--;
            }
        }
    }
    /**
     * 等待 唤醒机制
     * 
     * input先拿到cup的执行资源，wait()，等待output输出
     * 
     * output输出后，notify()唤醒input，自己再wait()
     * 
     * input被唤醒后继续执行，执行完后，notify() output线程，自己再wait()
     */
}

 

package cn.sasa.demo5;

public class OutputRunnable implements Runnable{

    private Resources rs = Resources.resource;
    @Override
    public void run() {
        int flag = 1000;
        while(flag > 0) {
            synchronized(rs) { //input 和 output 两个线程操作同一个数据源，必须保证同步锁是同一个锁
                if(!rs.flag) {
                    try {
                        rs.wait();
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                System.out.println(rs.getName() + "======" + rs.isGender() );
                rs.flag=false;
                rs.notify();
                flag--;
            }
        }
    }
}

 

package cn.sasa.demo5;

public class Test {
    public static void main(String[] args) {
        Runnable input = new InputRunnable();
        Runnable output = new OutputRunnable();
        new Thread(input).start();
        new Thread(output).start();
    }
}