多線程 -- sleep()方法和wait()方法區別 - Lai18.com IT技術文章收藏夾 http://www.lai18.com/content/1751290.html
Java 線程 sleep wait 深入解析 Thread - Lai18.com IT技術文章收藏夾
http://www.lai18.com/content/2439587.html
如何理解sleep持有鎖,wait釋放鎖?
如果sleep出現在synchronize塊中,sleep之後線程依然佔有鎖,其他線程不能訪問synchronize塊的代碼或函數。
如果wait出現在synchoronize塊中,wait之後線程釋放鎖,其他線程可以訪問synchronize塊的代碼或函數
如下的程序執行結果如下:
窗口二---賣出20 time=1455509031298
窗口二---賣出19 time=1455509031299
窗口二---賣出18 time=1455509031315
窗口二---賣出17 time=1455509031332
窗口二---賣出16 time=1455509031348
窗口二---賣出15 time=1455509031349
窗口二---賣出14 time=1455509031350
窗口二---賣出13 time=1455509031351
窗口二---賣出12 time=1455509031352
窗口二---賣出11 time=1455509031353
窗口二---賣出10 time=1455509031354
窗口二---賣出9 time=1455509031355
窗口二---賣出8 time=1455509031356
窗口二---賣出7 time=1455509031357
窗口二---賣出6 time=1455509031358
窗口二---賣出5 time=1455509031359
窗口二---賣出4 time=1455509031360
窗口二---賣出3 time=1455509031361
窗口二---賣出2 time=1455509031362
窗口二---賣出1 time=1455509031363
窗口二---賣出0 time=1455509031364
窗口三---賣出0 time=1455509031365
窗口一---賣出0 time=1455509031366
窗口四---賣出0 time=1455509031367
package testSynchronized;
import java.nio.charset.MalformedInputException;
public class demo2 {
public static void main(String[] args) {
Ticket2 t = new Ticket2();
Thread t1 = new Thread(t, "窗口一");
Thread t2 = new Thread(t, "窗口二");
Thread t3 = new Thread(t, "窗口三");
Thread t4 = new Thread(t, "窗口四");
t1.start();
t2.start();
t3.start();
t4.start();
}
}
class Ticket2 implements Runnable {
private int ticket = 20;
public void run() {
synchronized (this) {
while (true) {
try {
Thread.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (ticket <= 0) {
System.out.println(Thread.currentThread().getName()
+ "---賣出" + ticket + " time="
+ System.currentTimeMillis());
break;
}
System.out.println(Thread.currentThread().getName() + "---賣出"
+ ticket-- + " time=" + System.currentTimeMillis());
}
}
}
}