public class Service {
private final Object lock = new Object();
private int odd = -1;
private int even = -2;
/* 线程启动先后顺序无法预料,最后启动的线程释放锁,执行notify */
private int first_start_odd = 0;
private int first_start_even = 0;
private void print_odd() {
System.out.println("entry print_odd()");
while (odd < 100) {
synchronized (lock) {
if (first_start_odd == 0) {
lock.notify();
first_start_odd += 1;
}
try {
lock.wait();
System.out.println("奇数:" + (odd += 2));
Thread.sleep(50);
lock.notify();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
private void print_even() {
System.out.println("entry print_even()");
while (even < 100) {
synchronized (lock) {
if (first_start_even == 0) {
lock.notify();
first_start_even += 1;
}
try {
lock.wait();
System.out.println("偶数:" + (even += 2));
Thread.sleep(50);
lock.notify();
} catch (Exception e) {
}
}
}
}
public static void main(String[] args) {
final Service se = new Service();
new Thread(new Runnable() {
public void run() {
se.print_even();
}
}).start();
new Thread(new Runnable() {
public void run() {
se.print_odd();
}
}).start();
}
}
java 并发 两个线程交替打印 奇数偶数
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转载自blog.csdn.net/wang603603/article/details/89349881
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