public class Test1
{

private double width = 10;

// accessor method
public double getWidth()
{
    return width;
}

// mutator method
public void changeWidth(double change)
{
    width = width + change;
}

public static void main(String[] args)
{    Test1 t = new Test1();
    double wid = t.getWidth();
    System.out.println("wid: " + wid);
    t.changeWidth(5);
    wid = t.getWidth();
    System.out.println("wid: " + wid);
}
}