线程同步,synhronized,锁
0
悬赏园豆：10
[已解决问题]
解决于 2019-04-19 16:26
要求主线程执行100次，子线程执行10次，主线程执行100次，子线程执行10次。。。循环
代码如下：
public class Test_02 {
public static void main(String[] args){
MeThread me = new MeThread();
Thread t = new Thread(me);
t.start();
boolean flag = true;
int i = 1;
synchronized (me) {
while (flag) {
System.out.println(Thread.currentThread().getName() + i);
i++;
if (i % 100 == 0) {
try {
Thread.currentThread().wait();
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("===========");
me.notify();//Thread.currentThread().notifyAll();也不行
}
}
}
}
}}
class MeThread implements Runnable {
@Override
public synchronized void run() {
int i = 0;
boolean flag = true;
while (flag) {
System.out.println(Thread.currentThread().getName() + i);
i++;
if (i % 10 == 0) {
try {
Thread.currentThread().wait();
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("===========");
this.notify();//Thread.currentThread().notifyAll();也不行
}
}
}
}}
最佳答案
0
public class Test_02 {
public static void main(String[] args) {
MeThread me = new MeThread();
Thread t = new Thread(me);
t.start();
boolean flag = true;
//修改了初始值
int i = 0;
synchronized (me) {
while (flag) {
System.out.println(Thread.currentThread().getName() + i);
i++;
if (i % 100 == 0) {
try {
//方便观察效果,睡眠1s
Thread.sleep(1000);
System.out.println("main===========");
//从finally代码块中前移到wait()方法前
me.notify();
//锁对象为me
me.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}}
class MeThread implements Runnable {
@Override
public synchronized void run() {
int i = 0;
boolean flag = true;
while (flag) {
System.out.println(Thread.currentThread().getName() + i);
i++;
if (i % 10 == 0) {
try {
//方便观察
Thread.sleep(1000);
System.out.println("MeThread===========");
//同步方法锁对象为this,notify()移动到wait()方法前
this.notify();
//同步方法锁对象为this
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}}
收获园豆：10
其他回答(1)
0
平时项目开发的时候这个多线程用在哪里？怎么使用？
