生產者與消費者模型

生產者與消費者模型

/**
 * 創建存儲值對象的ValueObject
 */
public class ValueObject {
    public static String value="";
}


/**
 * 生產者
 */
public class P {
    private String lock;
    public P(String lock){
        super();
        this.lock=lock;
    }
    public void setvalue(){
        try {
            synchronized (lock) {
                if (!ValueObject.value.equals("")) {
                    lock.wait();
                }

                String value = System.currentTimeMillis() + "_" + System.nanoTime();
                System.out.println("set的值是:" + value);
                ValueObject.value = value;
                lock.notify();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

/**
 * 消費者
 */
public class C {
    private String lock;
    public C(String lock){
        super();
        this.lock=lock;
    }
    public void getValue(){
        try {
            synchronized (lock) {
                if (ValueObject.value.equals("")) {
                    lock.wait();
                }
                System.out.println("get的值是:" + ValueObject.value);
                ValueObject.value = "";
                lock.notify();
            }
        }catch (InterruptedException e){
            e.printStackTrace();
        }
    }
}

/**
 * 生產者線程
 */
public class ThreadP extends Thread {
    private P p;
    public ThreadP(P p){
        this.p=p;
    }

    @Override
    public void run() {
        while(true){
            p.setvalue();
        }
    }
}

/**
 * 消費者線程
 */
public class ThreadC extends Thread{
    private C c;
    public ThreadC(C c){
        this.c=c;
    }

    @Override
    public void run() {
        while(true){
            c.getValue();
        }
    }
}

/**
 * 運行函數
 */
public class Main{
    public static void main(String args[]){
     String lock=new String("");
     P p=new P(lock);
     C c=new C(lock);
     ThreadP threadP=new ThreadP(p);
     ThreadC threadC=new ThreadC(c);
     threadP.start();
        threadC.start();
    }
}