public class Calculator extends Thread {
int total;
publicvoid run() {
synchronized (this) {
for (int i = 0; i < 101; i++) {
total += i;
}
}
notifyAll();
}
}
public class ReaderResult extends Thread {
Calculator c;
public ReaderResult(Calculator c) {
this.c = c;
}
public void run() {
synchronized (c) {
try {
System.out.println(Thread.currentThread() + "等待计算结果。。。");
c.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread() + "计算结果为：" + c.total);
}
}
public static void main(String[] args) {
Calculator calculator = new Calculator();
new ReaderResult(calculator).start();
new ReaderResult(calculator).start();
new ReaderResult(calculator).start();
calculator.start();
}
}
运行结果：
Thread[Thread-1,5,main]等待计算结果。。。
Thread[Thread-2,5,main]等待计算结果。。。
Thread[Thread-3,5,main]等待计算结果。。。
Exception in thread "Thread-0" java.lang.IllegalMonitorStateException: current thread not owner
at java.lang.Object.notifyAll(Native Method)
at threadtest.Calculator.run(Calculator.java:18)
Thread[Thread-1,5,main]计算结果为：5050
Thread[Thread-2,5,main]计算结果为：5050
Thread[Thread-3,5,main]计算结果为：5050
我不明白那个异常是什么意思 怎么出现的异常