问题

由于某种原因，当我实现Runnable接口时，似乎无法调用start()方法

```java
public class ThreadTest implements Runnable {
  
	public void run() {
	}
		
	public static void main(String[] args) {
		ThreadTest test = new ThreadTest();		
		test.start();
	}
}

在start()下面我看到了一个红色的波浪线，提示我需要实现start方法或将test强制转换为对象类型

我在在线编译器中无法复现这个错误

我对于导致这个错误的原因感到非常困惑

<details>
<summary>英文:</summary>

for some reason i cant seem to invoke the start() method when i am implementing Runnable

public class ThreadTest implements Runnable {

public void run() {
}
	
public static void main(String[] args) {
	ThreadTest test = new ThreadTest();		
	test.start();
}

}

I am getting the red wiggle line under start() saying that I need to either implement start or type cast test to object

I am unable to reproduce this error in online compiler either


[![enter image description here][1]][1]


I am beyond baffled as to what is causing this error
[![enter image description here][2]][2]


  [1]: https://i.stack.imgur.com/DDMPk.png
  [2]: https://i.stack.imgur.com/c8vSD.png

</details>


# 答案1
**得分**: 2

请尝试这个：

```java
尝试这样做：

public class ThreadTest implements Runnable {

  public void run() {
  }

  public static void main(String[] args) {
      Thread test = new Thread(new ThreadTest());     
      test.start();
  }
}

另一种方式：

public class ThreadTest extends Thread{

  public void run() {
  }

  public static void main(String[] args) {
      ThreadTest test = new ThreadTest();     
      test.start();
  }
}

public class ThreadTest implements Runnable {

  public void run() {
  }
    
  public static void main(String[] args) {
      Thread test = new Thread(new ThreadTest());     
      test.start();
  }
}

public class ThreadTest extends Thread{

  public void run() {
  }
    
  public static void main(String[] args) {
      ThreadTest test = new ThreadTest();     
      test.start();
  }
}

答案2

得分: 0

你不应该这样调用

TestThread test=new TestThread();
test.start();

正确的方式是：

Thread thread=new Thread(new TestThread());
thread.start();

你可以继承Thread类或者实现Runnable接口，并重写run方法，这样当调用start方法时，它会执行run方法内部的代码。

TestThread test=new TestThread();
test.start();

Thread thread=new Thread(new TestThread());
thread.start();