如題
public class PrintNumThreadTest {
public static void main(String[] args) {
PrintNumOpt printNumOpt = new PrintNumOpt();
new Thread(() -> printNumOpt.print0()).start();
new Thread(() -> printNumOpt.print1()).start();
}
}
class PrintNumOpt {
int num = 0;
int opt = 0;
int maxNum = 100;
ReentrantLock lock = new ReentrantLock();
/**
* 偶數(shù)
*/
Condition condition0 = lock.newCondition();
/**
* 奇數(shù)
*/
Condition condition1 = lock.newCondition();
public void print0() {
while (this.opt == 0) {
lock.lock();
try {
for (; num < maxNum; num++) {
if (num % 2 == 0) {
System.out.println("偶數(shù)：" + num);
this.opt = 1;
condition1.signal();
condition0.await();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
}
public void print1() {
while (this.opt == 1) {
lock.lock();
try {
for (; num < maxNum; num++) {
if (num % 2 == 1) {
System.out.println("奇數(shù)：" + num);
this.opt = 0;
condition0.signal();
condition1.await();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
}
}
