Java 这个代码有什么错误 类thread123扩展线程{ 公共线程123（int-ind，int-interval）{ i0=ind； 延迟=间隔； } 公开募捐{ 试一试{ 对于（int i=1；i thread123 t2=new thread123（2，3.0）；无效，因为thread123只接受ints delay=interval；无效，因为delay未定义，因此与delay有关的任何内容都与此相关 }否则，如果（i0=2）{是和赋值，而不是评估，这不等同于布尔值，那么这是无效的 System.out.println（“n=“+i+”，Time=“+（delay*i-delay）+”，线程三：“+（18*（i*i）-12）/（i-2）；缺少关闭）

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代码转储不会产生问题。您能解释一下您的预期结果是什么以及您的实际结果是什么吗？

}否则，如果（i0=2）{

看起来可疑

class thread123 extends Thread {

    public thread123(int ind, int interval) {
        i0 = ind;
        delay = interval;
    }

    public void run() {

        try {
            for (int i = 1; i <= 10; i++) {
                if (i0 == 1) {
                    System.out.println("n = " + i + ", Time = " + (delay * i - delay) + ", Thread one: " + (2 * i + 5));
                } else if (i0 = 2) {
                    System.out.println("n = " + i + ", Time = " + (delay * i - delay) + ", Thread Two: " + (i + 10) * 2);
                } else {
                    System.out.println("n = " + i + ", Time = " + (delay * i - delay) + ", Thread Three: " + (18 * (i * i) - 12) / (i - 2);
                }
                sleep(delay);
            }

        } catch (InterruptedException e) {
            return;
        }

    }

    private int i0;
}

class Threads {

    public static void main(String[] args) throws InterruptedException {
        thread123 t1 = new thread123(1, 20);
        thread123 t2 = new thread123(2, 3.0);
        thread123 t3 = new thread123(3, 40);
        t1.start();
        t2.start();
        t3.start();
        t1.join();
        t2.join();
        t3.join();
        System.out.println("Main thread done");
    }

}