請寫出下面程序的運行結果，代碼如下

public class ThreadA {public static void main(String[] args) {ThreadB b = new ThreadB();Threadc c = new Threadc();c.setName("第二線程");b.setName("第一線程");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("Completted.Now back to "+Thread.currentThread().getName());b.start();}catch(InterruptedException e){}}}}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);notifyAll();}} }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();}} }

2 運行結果為:

main is start... Waiting for b1 to complete... 第二線程 is running... sum is 362880 Completted.Now back to main 第一線程 is running.. total is 45

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3分析如下:

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