用线按顺序打印数字

Question

我想创建两个线程，第一个是偶数，第二个是奇数，我想要有同步列表来添加这个数字，最后打印数字，以便这是我的代码

     @Override
    public void run() {
        synchronized (allNumber) {
            for (int i = 1; i <=number ; i+=2) {
                allNumber.add(i);
                try {
                    allNumber.wait();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }

        }
    }
     @Override
    public void run() {
        synchronized (allNumber){
        for (int i = 0; i <= number; i+=2) {
            allNumber.add(i);
            allNumber.notify();
        }
        }
    }
    public class Main {
    private static Scanner input = new Scanner(System.in);
    public static void main(String[] args) throws InterruptedException {

        System.out.print("Enter Your Number: ");
        int number = input.nextInt();

        List<Integer> sharedList = new ArrayList<>();

        Odd oddThread = new Odd(number, sharedList);
        Even evenThread = new Even(number, sharedList);

        Thread thread = new Thread(oddThread);

        Thread thread1 = new Thread(evenThread);

        thread.start();
        thread1.start();

        System.out.println("List: " + sharedList);

    }
}

我的输出不按顺序且不完整

Answer 1

你想要数字按顺序排列，那么你必须确保线程相互等待。 我建议你这样写： 均匀

for (int i = 1; i <=number ; i+=2) {
  if(i % 2 == 1){
    synchronized (allNumber) {
      if(i % 2 == 1){
            allNumber.add(i);
      }  
    }
  }
}

奇怪

for (int i = 0; i <=number ; i+=2) {
  if(i % 2 == 0){
    synchronized (allNumber) {
       if(i % 2 == 0){
            allNumber.add(i);
       }   
    }
  }
}