java - 使用 throw InterruptedException 时“找不到符号”

Question

我的线程同时运行，导致它们的输出混淆，所以我在第一个线程上设置了延迟，但我无法让它运行，因为 Java 拒绝接受 InterruptedException。到目前为止，以下是我的代码：

class Evens extends Thread
{
    public void run()
    {
        System.out.println("");
        System.out.println("Even numbers between 0 and 30:");
        System.out.println("");
        boolean isEven;
        for (int num = 0; num <=30; num++)  //This for loop tests for evenness and then prints it.
        {
            if(num % 2 == 0)
            {
                    isEven = true;
        }
            else
            {
                isEven = false;
        }

            if(isEven == true)
            {
                System.out.print(num + ", ");
            }
            else
            {
            }
        }
    }
}

class Odds extends Thread
{
    public void run()
    {
        System.out.println("");
        System.out.println("Odd numbers between 0 and 30:");
        System.out.println("");
        boolean isOdd;
        for (int num = 0; num < 30; num++)  //This for loop tests for oddness and then prints it.
        {
            if(num % 2 != 0)
            {
                isOdd = true;
            }
            else
            {
                isOdd = false;
            }

            if(isOdd == true)
            {
                System.out.print(num + ", ");
            }
            else
            {
            }
        }
    }
}    

class Printer
{    
    public static void main(String args[])
    {
        Evens ev = new Evens();
        Odds od = new Odds();
        throw InterruptedException("Another string is running!");
        {
            ev.start();
            Thread.sleep (4000);
            od.start();
        }       
    }
}

Answer 1

抛出new异常时需要关键字

throw new InterruptedException("...");

但sleep会抛出自己的InterruptedException，因此无需显式抛出异常

try {
    Thread.sleep (4000);
} catch (InterruptedException e) {
   ...
}

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