关于线程问题 - 黑马程序员技术交流社区

public class TestThread {
public static void main(String[] args) {
ThreadB b = new ThreadB();
ThreadC c = new ThreadC();
c.setName("第二线程");
b.setName("第一线程");
c.start();
System.out.println(Thread.currentThread().getName() + " is start ....");
synchronized (c) {
try {
System.out.println("Waiting for b1 to complete.....");
c.wait();
System.out.println("Completed.now back to " + Thread.currentThread().getName());
b.start();
} catch (Exception e) {
// TODO: handle exception
}
}
}
}
class ThreadB extends Thread {
int total;
public void run() {
synchronized (this) {
System.out.println(Thread.currentThread().getName() + " is running...");
for (int i = 0; i < 10; i++) {
total += i;
}
System.out.println("total is " + total);
}
}
}
class ThreadC extends Thread {
int sum = 1;
public void run() {
synchronized (this) {
System.out.println(Thread.currentThread().getName() + " is running...");
for (int i = 1; i < 10; i++) {
sum *= i;
}
System.out.println("sum is " + sum);
notify();
}
}
}

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