关于重载重载：在一个类定义中，可以编写几个同名的方法，但是只要它们的签名参数列表不同，Java就会将它们看做唯一的方法。

　　简单的说：一个类中的方法与另一个方法同名，但是参数表不同，这种方法称之为重载方法。-With regard to overloading overloading: In a class definition, you can write a few of the same name method, but as long as they are different from the signature of the parameter list, Java will be as their only option. Simply put: a class method with another method of the same name, but different parameter table, this method is called overloaded methods.