剑指offer-生产者消费者模型

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模拟消费者和生产者的多线程生产。

1，Resource.java定义了一个数组，生产者向里面存入数据，消费者从里面取出数据。

2，Input.java ,生产者线程

3，Output.java, 消费者线程

//创建资源类

Resource.java

package case98_ProducerConsumer;//创建资源类public class Resource {// 创建存数数组private int[] cell = new int[50];// inPos表示存入时的数组下标，outPos表示取出时数组下标private int inPos = 0, outPos = 0;// cell[]数组里面当前的有效数数量private int count = 0;// 存数public synchronized void put(int num) {try {while (count == cell.length)this.wait();cell[inPos] = num;System.out.println(">put< 线程正在执行,并且放入数据 cell[" + inPos + "]" + "=" + cell[inPos] + "......");inPos++;if (inPos == cell.length)inPos = 0;count++;this.notify();} catch (InterruptedException ie) {ie.printStackTrace();}}// 取数public synchronized int get() {int data = 0;try {while (count == 0)this.wait();data = cell[outPos];System.out.println(">get< 线程正在执行,并且取出数据 cell[" + outPos + "]" + "=" + cell[outPos]);outPos++;if (outPos == cell.length)outPos = 0;count--;this.notify();} catch (InterruptedException e) {e.printStackTrace();}return data;}}

//创建存数线程，生产者

Input.java

package case98_ProducerConsumer;//存数线程 ,生产者线程public class Input implements Runnable {private Resource s;private int num = 0;// 构造函数public Input(Resource s) {this.s = s;}@Overridepublic void run() {while (true) {s.put(num++);if (num > 191)num = 0;}}}

//创建取数线程，消费者

Output.java

package case98_ProducerConsumer;//取数线程， 消费者线程public class Output implements Runnable {private Resource s;// 构造函数public Output(Resource s) {this.s = s;}@Overridepublic void run() {while (true)s.get(); // 循环取出元素}}

//创建主线程

ProducerConsumer.java

package case98_ProducerConsumer;public class ProducerConsumer {public static void main(String[] args) {// 创建资源对象Resource s = new Resource();// 创建input对象Input in = new Input(s);// 创建output对象Output out = new Output(s);// 创建生产者线程new Thread(in).start();// 创建消费者线程new Thread(out).start();}}

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