线程创建

• 通过继承Thread类创建

class Test extends Thread{
    public void run() {
        // do something
    }
}

new Test().start();

• 通过向Thread()构造方法传递Runnabe对象创建

class MyTask implements Runnable {
 public void run() { 
    // do something
  }
}

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

• 匿名实现Runnable

new Thread(){
  public void run() {
      // do something
 }.start();

• 用Lambda表达式

new Thread( ()-> {
   // do something
} ).start();