Hi,

I have a huge class, which has about 30 class variables. And the class
has many methods. Each method doesn't need all the 30 class variables,
only need a subset of them. In another word, say the 30 class variables
can be grouped into 6 groups (say group A, group B, .., group F).

public class MyHugeClass
{
    //group A class variables
    private double a, b, c, d, e;

    //group B class variables
    private double w, t;

    ..

    //group F class variables
    private double t1, t2,t3;

    public void method1()  //only need group A and F variables, but it can
access all, unfortunately
    {
        ...//code
    }

    public void method2()  //only need group B and C variables, but it can
access all, unfortunately
    {
        ...//code
    }

    ...//more methods omitted

} //end of class

The method method1() only need group A and group F class variables,
doesn't need others. The method method2() only need group B and group C
class variables, doesn't need others. But since method1() and method2()
all below to the class, so they have access to all the class variables
(from group A to group F), which is more than they need and could
introduce errors. As you can imagine, this is a huge class. More
restrictions, better, because it could force the errors to be detected.

Thank you very much.