题目:编写一段生产者/消费者的 Java 代码,其中生产者每次生产 1 个 0 到 1000 之间的随机数,消费者则把该随机数打印出来。如果产生的随机数为 0,则生产者、消费者均退出运行。要求生产者、消费者均使用线程来实现。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 import java.util.Random;import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.BlockingQueue;public class ThreadTest { public static void main (String[] args) { Storage storage = new Storage(); new Producer(storage).start(); new Customer(storage).start(); } } class Customer extends Thread { private Storage storage; public Customer (Storage storage) { this .storage = storage; } public void run () { while (true ) { try { if (Storage.NUM == 0 ) { System.out.println("打印:" + 0 + ",线程终止" ); break ; } Integer num = storage.print(); System.out.println("打印:" + num); Thread.sleep(10 ); } catch (InterruptedException e) { e.printStackTrace(); } } } } class Producer extends Thread { private Storage storage; public Producer (Storage storage) { this .storage = storage; } public void run () { while (true ) { try { Integer num = new Random().nextInt(1000 ); Storage.NUM = num; if (Storage.NUM == 0 ) { System.out.println("生产:" + 0 + ",线程终止" ); break ; } storage.put(num); System.out.println("生产:" + num); Thread.sleep(10 ); } catch (InterruptedException e) { e.printStackTrace(); } } } } class Storage { private BlockingQueue<Integer> randomData = new ArrayBlockingQueue<Integer>( 1 ); public static int NUM = -1 ; public void put (Integer number) { try { randomData.put(number); } catch (InterruptedException e) { e.printStackTrace(); } } public int print () { try { Integer number = randomData.take(); return number; } catch (InterruptedException e) { e.printStackTrace(); } return 0 ; } } import java.util.Random;import java.util.concurrent.BlockingQueue;import java.util.concurrent.SynchronousQueue;public class Test { BlockingQueue<Integer> queue = new SynchronousQueue<Integer>(); Random rd = new Random(); class Producer extends Thread { @Override public void run () { while (true ) { int number = rd.nextInt(1000 ); System.out.println("Producer Generate : " + number); try { queue.put(number); if (number == 0 ) { System.out.println("Producer stoped." ); return ; } } catch (InterruptedException e) { e.printStackTrace(); } } } } class Consumer extends Thread { @Override public void run () { while (true ) { try { if (queue.take() == 0 ) { System.out.println("Consumer stoped." ); return ; } ; } catch (InterruptedException e) { e.printStackTrace(); } } } } public void startTest () { Producer producer = new Producer(); Consumer consumer = new Consumer(); producer.start(); consumer.start(); } public static void main (String[] args) { new Test().startTest(); } } import java.util.Random;import java.util.concurrent.BlockingQueue;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.LinkedBlockingQueue;public class BlockingQueueTest { private static String FLAG="99" ; public static class Basket { BlockingQueue<String> basket = new LinkedBlockingQueue<String>(1000 ); public String produce () throws InterruptedException { int num = new Random().nextInt(1000 ); System.out.println("++放入篮子中一个数字:" +num ); basket.put(num+"" ); return num+"" ; } public String consume () throws InterruptedException { String num=basket.take(); System.out.println("--取出篮子中一个数字:" +num ); return num; } } public static void testBasket () { final Basket basket = new Basket(); class Producer implements Runnable { public void run () { try { while (true ) { if (basket.produce().equals(FLAG)){ System.out.println("!成功生产正确数字:" +FLAG); break ; } Thread.sleep(300 ); } } catch (InterruptedException ex) { } } } class Consumer implements Runnable { public void run () { try { while (true ) { if (basket.consume().equals(FLAG)){ System.out.println("!成功获取正确数字:" +FLAG); break ; } Thread.sleep(500 ); } } catch (InterruptedException ex) { } } } ExecutorService service = Executors.newCachedThreadPool(); Producer producer = new Producer(); Consumer consumer = new Consumer(); service.submit(producer); service.submit(consumer); try { Thread.sleep(60 *1000 ); } catch (InterruptedException e) { } service.shutdownNow(); } public static void main (String[] args) { BlockingQueueTest.testBasket(); } } }
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