问题与字符串作为参数

Question

First of, sorry for my bad English. I'm pretty new to java and we are learning it in School at the moment. In my Program I want to use String as a parameter but when I try to build an object I can't type anything in for the Parameter. Here's my bytecode:

public String gender;
public Waage(String pGender)
{
    gender = pGender;
}

As you can see I want the user to type in their gender, the variable gender will then be set to be the same as the parameter pGender. If I want to create an object with Bluej now, I just get the error that it cannot find symbol - variable x (for example female). Could someone please explain to me what I'm doing wrong or how to fix it? Thank you! Also this is my first question here so if I did any big mistakes just tell me.

Edit: My full code:

public class Waage
{ 
   public String gender;

   public Waage(String pGender)
   {
       gender = pGender;
   }

   public void changeGender(String pGender)
   {
       gender = pGender;
   }

   public String giveGender()
   {
       return gender;
   }
}

And the Error Message is If I would type in female : Error: cannot find symbol - variable female

Answer 1

In the constructor,

public Waage(pGender)
{
    gender = pGender;
}

pGender is local variable of the constructor, that is taking String argument, and it is missing datatype. Edit that as below and it'll compile.

 public Waage(String pGender)
 {
     gender = pGender;
 }

Answer 2

One of the cause is not passing string in double quotes in constructor call.

You must be creating your class's object like this:

Waage waage = new Waage(female);

Either use :

Waage waage = new Waage("female");

or:

String gender = "female";
Waage waage = new Waage(gender);