Today, he wrote a producer-consumer model, there is no problem in a single producer and consumer of exercise, a production of a data consumption data;
But when a consumer adds time, producers will produce a negative product came out, my judgment is, when the product is <0; consumers are blocked, but
Did not seem to succeed, still produce negative product;
Pursuing big God answering questions;
The following code is posted
package Thread_p_c;
public class Producer implements Runnable {
private Product p;
public Producer (Product p) {
this.p = p;
}
@Override
public void run() {
while(true) {
synchronized (p) {
if(!p.isFlag()) {
try {
p.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("生产者开始制造产品：");
int i = p.getPno();
i++;
p.setPno(i);
p.setFlag(false);
System.out.println ( "producers to produce the" + p.getPname () + "->" + p.getPno ());
System.out.println ( "producers end of production, consumption wait!");
P.notify ();
}
}
}
}
Thread_p_c Package;
public class Consumer the implements the Runnable {
Private Product P;
public Consumer (Product P) {
this.p = P;
}
@Override
public void RUN () {
the while (to true) {
the synchronized (P) {
IF (p.isFlag () || p.getPno () <= 0) {
the try {
p.wait ();
} the catch (InterruptedException E) {
// the TODO Auto-Generated Block the catch
e.printStackTrace ();
}
}
System.out.println ( "consumers into consumer shopping");
System.out.println ( "consumers are consumer products:");
System.out.println ( "consumer spending in .......");
int i = p.getPno ();
System.out.println ( "end consumer spending, consumption of" + p.getPname () + ":" + p.getPno ());
i--;
p.setPno (i);
p.setFlag (to true) ;
p.notify ();
System.out.println ( "consumer end, is to inform manufacturers to produce ...");
}
}
}
}
package Thread_p_c;
public class Product {
private int pno=0;
public Product(String pname) {
this.pname=pname;
}
private String pname ="灯泡";
private boolean flag = true;
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
public int getPno() {
return pno;
}
public void setPno(int pno) {
this.pno = pno;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
}
package Thread_p_c;
public class pc_model {
private int i = 0;
private boolean flag = true;
public static void main(String[] args) {
Product p = new Product("灯泡");
Thread t1 = new Thread(new Producer(p));
Thread t2 = new Thread(new Consumer(p));
t1.start();
t2.start();
// new Thread(new Producer(p)).start();
// new Thread(new Consumer(p)).start();
}
}