forked from lizeyang18/byteDanceAlgorithm
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtest40.java
More file actions
101 lines (92 loc) · 3.06 KB
/
test40.java
File metadata and controls
101 lines (92 loc) · 3.06 KB
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
package byteDance;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* Created by lizeyang on 2020/5/15.
* 循环打印ABC，使用lock和condition实现,为了显示方便，只循环打印10次
*/
public class test40 {
Lock lock = new ReentrantLock();
Condition conditionA = lock.newCondition();
Condition conditionB = lock.newCondition();
Condition conditionC = lock.newCondition();
private char currentThreadName = 'A';
class ThreadA implements Runnable {
@Override
public void run() {
for (int i = 0; i < 10; i++) {
lock.lock();
try {
while (currentThreadName != 'A') {
try {
conditionA.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("A");
currentThreadName = 'B';
conditionB.signal();
} finally {
lock.unlock();
}
}
}
}
class ThreadB implements Runnable {
@Override
public void run() {
for (int i = 0; i < 10; i++) {
lock.lock();
try {
while (currentThreadName != 'B') {
try {
conditionB.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("B");
currentThreadName = 'C';
conditionC.signal();
} finally {
lock.unlock();
}
}
}
}
class ThreadC implements Runnable {
@Override
public void run() {
for (int i = 0; i < 10; i++) {
lock.lock();
try {
while (currentThreadName != 'C') {
try {
conditionC.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("C");
currentThreadName = 'A';
conditionA.signal();
} finally {
lock.unlock();
}
}
}
}
public static void main(String[] args) {
test40 test40 = new test40();
ExecutorService service = Executors.newFixedThreadPool(3);
service.execute(test40.new ThreadA());
service.execute(test40.new ThreadB());
service.execute(test40.new ThreadC());
service.shutdown();
}
}