When a method is called, if the method has parameters, the parameters must be instantiated, that is, the parameter variables must have specific values. In Java, all the parameters of a method are value passing, that is, the value of the parameter variable in a method is a copy of the value specified by the caller. If you pass an int value to the int parameter X of the method, the value obtained by the parameter x is a copy of the passed value. Method if you change the value of the parameter, it does not affect the value of the variable “pass value” to the parameter.

public class Javase_34
{
  public static void main(String[] args)
  {
    myThread you=new myThread("你");
    myThread she=new myThread("她");
    you.start();   //激活you线程
    try{
      you.join();  //限制you线程结束后才能往下执行
    }
    catch(InterruptedException e) {}
    she.start();
    try{
      she.join();  //限制she线程结束后才能往下执行
    }
    catch(InterruptedException e) {}
    System.out.println("主方法main()运行结束！");
  }
}