FilesExpand file tree

 main

/

OverLocking.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

46 lines (40 loc) · 1.38 KB

 main

/

OverLocking.java

Copy path

Top

File metadata and controls

• Code
• Blame

46 lines (40 loc) · 1.38 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

package optjava;

import java.security.SecureRandom;

public final class OverLocking {

private static final Object lock = new Object();

public static void main(String[] args) {

SecureRandom sr = new SecureRandom();

Runnable r = () -> {

sr.setSeed(System.nanoTime());

final int initialSleep = Math.abs(sr.nextInt() % 10_000);

try {

Thread.sleep(initialSleep);

} catch (InterruptedException e) {

e.printStackTrace();

}

synchronized (lock) {

try {

final int sleep = Math.abs(sr.nextInt() % 2_000);

Thread.sleep(sleep);

System.out.println("Thread: "+ Thread.currentThread().getName() +" finished");

} catch (InterruptedException e) {

e.printStackTrace();

}

}

};

Thread[] t = new Thread[20];

for (int i = 0; i < t.length; i++) {

t[i] = new Thread(r);

t[i].setName("Waiter-"+ i);

t[i].start();

}

for (int i = 0; i < t.length; i++) {

try {

t[i].join();

System.out.println("Thread: "+ t[i].getName() +" joined");

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}